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Up Topic The Rybka Lounge / Computer Chess / Highest wrong evaluation by chess engine
- - By Gambit-man (**) Date 2012-04-03 23:11 Edited 2012-04-04 01:18
Hi all,
we all know that engines, even the strongest ones, are notoriously bad endgame players. this can often be seen when in an endgame where they are a whole piece up (and the evaluation confirms that), but in actual fact, the game is a draw because the opposition is somehow (varies because of different endgames) able to hold the position.
i've regularly seen evaluations of c. +/-3.50, but tonight in my engine tournament i saw Strelka 5.1 give an evaluation of between 7.00-7.50 (i'll dig out the game at the next interruption). It was KQPP (not connected) vs KRR endgame.
Has anyone seen a higher evaluation where the 'winning' engine did not win?

[EDIT] I shoulda pointed out that Strelka's opponent here, Ivanhoe 9.47b x64 evaluated the same positions as being +/-2.50-3.00
Parent - - By Bouddha (****) [ch] Date 2012-04-04 00:03
Please try this position with Rybka 4.1
That will tell us if Vas is wrong
Parent - By Gambit-man (**) Date 2012-04-04 00:32
What did he say?
Parent - - By Barnard (Bronze) Date 2012-04-04 00:17
Strelka 5.1 i nearly a clone of Houdini 1.5,so if you try the same position with Houdini 1.5 8is a free engine,and you can download free at Houdart's web page,you can see and tell us if the scores are nearly the same

i had high scores in endgames that engines didnt manage to won,but never so high like that

so please,can you download and try the position with Houdini 1.5 and Houdini 2.0?
Parent - - By Gambit-man (**) Date 2012-04-04 00:29
I don't have Rybka 4.1 or Houdini 1.5. I have Deep Rybka 4, is there an improvement in this respect to 4.1? I have Houdini 2, i suspect it'd be better than 1.5, would it not?
Parent - By Barnard (Bronze) Date 2012-04-04 00:35
i habvent rybka,so i cant answer you about the engine

about Houdini,is slightly better version 2 from 1.5,with nice features for analisis

i told you to analisse the position with Houdini 1.5a,because Strelka 5.1 is a clone of Houdini 1.5a,and is supossed will have the same errors,and maybe the errors/bad knowledge is solved in the version 2

so please,can you download the version 1.5a (go to Houdini page,and you can download free there),and test the position with Houdini 1.5a?
Parent - By Uly (Gold) [mx] Date 2012-04-04 00:50

> I don't have Rybka 4.1 or Houdini 1.5. I have Deep Rybka 4, is there an improvement in this respect to 4.1?


The improvement of Rybka 4.1 is for interactive analysis of chess positions, as she will not get stuck forever on some fail lows.

Otherwise, keep your Rybka 4, apparently it got higher ELO...
Parent - - By Permanent Brain (*****) Date 2012-04-04 00:47 Edited 2012-04-04 02:08
Strelka 5.1 simply uses bigger evaluation numbers.

Fortresses were typically misevaluated, except EGTBs could help with that. But as for late, it seems to me progress has been made even at default settings. IOW., even without the idea of reducing the 50 moves distance internally (I suppose).

8/3Q1pk1/5p2/4r3/5K2/8/8/8 w - - 0 1


Engine: Houdini 1.5a-u (128 MB), Atom N455/1.66 GHz
by Robert Houdart
GaviotaTb EGTB not available
14/24   0:01   +0.03   1.Qb7 Rg5 2.Kf3 Rg6 3.Qc8 f5 4.Kf4 Rg4+ 5.Kxf5 Rg6 6.Qc3+ Kf8 7.Qd3 Re6 8.Qd8+ Kg7 9.Qd4+ Kg8 10.Kf4 Kf8 11.Qh8+ Ke7 (639.214) 465
(...)
28/55   0:18   +0.03   1.Qb7 Rg5 2.Kf3 Rg6 3.Qc8 f5 4.Kf4 Rg4+ 5.Kxf5 Rg6 6.Qc3+ Kf8 7.Qd3 Re6 8.Qd8+ Kg7 9.Qd4+ Kg8 10.Kf4 Kf8 11.Qh8+ Ke7 12.Qh4+ Kf8 13.Qd8+ Kg7 14.Qg5+ (13.251.763) 698
best move: Qd7-b7 time: 0:19.110 min  n/s: 698.000  CPU 99.0%   n/s(1CPU): 705.050  nodes: 13.251.763

As for biggest wrong eval...

QBk4b/PRP5/1P6/8/8/8/8/7K w - -


Strelka 5.1:

46.00   0:01   +51.95 :lol:  1.Kg2 Bf6 2.Kf3 Bd4 3.Ke4 Bg7 4.Kf4 Bf6 5.Ke3 Bh8 6.Kd3 Bf6 7.Kc4 Be5 8.Kd5 Bh8 9.Kc5 Bf6 10.Kb5 Be7 11.Kc4 Bh4 12.Kd5 Bf6 13.Kc5 Bg7 14.Kb5 (556.350) 382
(...) 75.01   0:33   +52.26  1.Kg2 Bf6 2.Kf3 Bd4 3.Ke4 Bg7 4.Kf4 Bf6 5.Ke3 Bh8 6.Kd3 Bf6 7.Kc4 Be5 8.Kb5 Bd6 9.Kc6 Be5 10.Kd5 Bh8 11.Kc5 Bf6 12.Kb5 Be7 13.Kc4 Bh4 14.Kd5 (14.475.300) 435
best move: Kh1-g2 time: 0:33.369 min  n/s: 435.465  nodes: 14.475.300
Parent - By Uly (Gold) [mx] Date 2012-04-04 00:54
I'm impressed at how Stockfish got this right in one second, I actually was expecting a bigger wrong eval :lol:

Engine: Stockfish 2.1.1 G2c (128 MB)
by Tord Romstad, Marco Costalba and Joona

45/55   0:01   +23.41  1.Kg2 Ba1 2.Kf2 Be5 3.Kf1 Bb2 4.Ke2 Bc1 5.Kf3 Ba3 6.Ke4 Bc1 7.Ke5 Bb2+ 8.Kd6 Ba3+ 9.Ke6 Bb2 10.Kd5 Bc1 11.Ke4 Ba3 12.Kf4 Bc5 13.Kf5 Bf8 14.Kf6 (2.414.992) 1931
46/55   0:01   +23.26--  1.Kg2 Ba1 2.Kf2 Be5 3.Kf1 Bb2 4.Ke2 Bc1 5.Kf3 Bh6 6.Kg2 Bg7 7.Kg3 Bc3 8.Kf4 Bd2+ 9.Ke5 Bb4 10.Ke4 Bc5 11.Ke5 Be7 12.Kd5 Ba3 13.Ke6 Bb2 14.Kf5 (2.446.745) 1932
46/55   0:01   +23.10--  1.Kg2 Ba1 2.Kf2 Be5 3.Ke2 Bd4 4.Kf3 Bc5 5.Kg4 Be7 6.Kh5 Bb4 7.Kg6 Bc3 8.Kg5 Bd2+ 9.Kg4 Bc3 10.Kh4 Bf6+ 11.Kh5 Be7 12.Kg6 Bb4 13.Kf5 Bd2 14.Kg4 (2.456.466) 1940
46/55   0:01   +22.66--  1.Kg2 Ba1 2.Kf3 Bc3 3.Kf4 Bd2+ 4.Ke4 Bh6 5.Kf5 Bd2 6.Ke5 Bc3+ 7.Ke4 Bg7 8.Ke3 Bh6+ 9.Kf2 Bg7 10.Kf3 Bf8 11.Ke2 Bd6 12.Kf1 Bc5 13.Ke1 Be3 14.Kd1 (2.467.917) 1925
46/55   0:01   +22.19--  1.Kg2 Ba1 2.Kf3 Bc3 3.Kf4 Bd2+ 4.Ke4 Bh6 5.Kf5 Bg7 6.Kg5 Bf8 7.Kh4 Bb4 8.Kh3 Bf8 9.Kg2 Bc5 10.Kf3 Bf8 11.Ke2 Bd6 12.Kf1 Bc5 13.Ke1 Be3 14.Kd1 (2.471.451) 1905
46/55   0:01   +21.77--  1.Kg2 Ba1 2.Kf3 Bc3 3.Ke3 Be5 4.Ke4 Bb2 5.Kf4 Bc3 6.Ke3 (2.495.211) 1900
46/55   0:01   +21.25--  1.Kg2 Ba1 2.Kf3 Bc3 3.Ke3 Be5 4.Kd2 Bd6 5.Ke2 Ba3 6.Kd3 Bf8 7.Kd4 Bg7+ 8.Ke4 Bc3 9.Ke3 (2.551.187) 1919
46/55   0:01   +19.13--  1.Kg2 Ba1 2.Kf3 Bc3 3.Ke2 Bb2 4.Kd2 Ba3 5.Ke3 Bb2 6.Kf4 Bf6 7.Kg4 Bc3 8.Kh4 Bd2 9.Kh5 Bc1 10.Kh4 Be3 11.Kg4 Bc5 12.Kf3 Bd6 13.Ke2 Ba3 14.Kd3 (2.580.416) 1941
46/55   0:01   +18.33--  1.Kg2 Ba1 2.Kf3 Bc3 3.Ke2 Bb2 4.Kd2 Ba3 5.Kd3 Bf8 6.Kd4 Bg7+ 7.Kd5 Bb2 8.Ke6 Bc3 9.Kd6 Bg7 10.Ke7 Bd4 11.Kf7 Bc3 12.Ke7 Bd4 (2.599.071) 1933
46/55   0:01   +15.27--  1.Kg2 Ba1 2.Kf3 Bc3 3.Ke2 Bb2 4.Kd2 Ba3 5.Kd3 Bf8 6.Ke2 Bd6 7.Kf2 Bc5+ 8.Ke2 Be7 9.Ke3 Ba3 10.Kd4 Bc1 11.Kc3 Bh6 12.Kc2 Bg7 13.Kd2 Bh6+ 14.Kd1 (2.611.247) 1920
46/55   0:01   +11.88--  1.Kg2 Ba1 2.Kf3 Bc3 3.Ke2 Bb2 4.Kd2 Ba3 5.Kc2 Bf8 6.Kb3 Bc5 7.Kc2 Bf8 (2.645.486) 1923
46/55   0:01   +5.77--  1.Kg2 Ba1 2.Kf3 Bc3 3.Ke2 Bb2 4.Kd2 Ba3 5.Kc3 Bf8 6.Kc2 Bh6 7.Kd3 Bf8 8.Ke2 Bd6 9.Kf2 Bc5+ 10.Ke2 Be7 11.Ke3 Bg5+ 12.Ke4 Bf6 13.Kf5 Bd4 14.Kg6 (2.677.210) 1924
46/57   0:01    0.00   1.Kg2 Ba1 2.Kf3 Bc3 3.Ke2 Bb2 4.Kd2 Ba3 5.Kc3 Bf8 6.Kc2 Bh6 7.Kd3 Bf8 8.Kd4 Bg7+ 9.Ke3 Bh6+ 10.Kf3 Bd2 11.Ke4 Bh6 12.Kf3 (2.756.999) 1938
47/57   0:01    0.00   1.Kg2 Ba1 2.Kf3 Bc3 3.Ke2 Bb2 4.Kd2 Ba3 5.Kc3 Bf8 6.Kc2 Bh6 7.Kd3 Bf8 8.Kd4 Bg7+ 9.Ke3 Bh6+ 10.Kf3 Bd2 11.Ke4 Bh6 12.Kf3 (2.796.658) 1944
48/57   0:01    0.00   1.Kg2 Ba1 2.Kf3 Bc3 3.Ke2 Bb2 4.Kd2 Ba3 5.Kc3 Bf8 6.Kc2 Bh6 7.Kd3 Bf8 8.Kd4 Bg7+ 9.Ke3 Bb2 10.Kd3 Bg7 11.Ke3 (2.838.589) 1932
Parent - By Gambit-man (**) Date 2012-04-04 00:59
lol, nice one!
Parent - By Barnard (Bronze) Date 2012-04-04 01:08
your 2 examples are right,but the endgame that he told us,kqppkrr cant be a fortress (meaning fortess like you showed at example 1),because was the queen who has the pawns,not the player with the 2 rooks
Parent - - By kgburcham (***) [us] Date 2012-04-04 01:50
QBk4b/QRP5/QP6/PP6/8/8/8/7K w - - 0 1


Stockfish 2.2.2 JA SSE42:

1.Kg2 Bc3 2.Kh3 Be1 3.Kg4 Bf2 4.Kf4 Bd4 5.Kg5 Be5 6.Kf5 Bd6 7.Ke6 Bb4 8.Kd5 Bc3 9.Ke4 Bb4 
  +-  (54.02)   Depth: 43/50   00:00:01  2331kN
1.Kg2 Bc3 2.Kf2 Bf6 3.Ke3 Bh8 4.Ke4 Bf6 5.Kd5 Be7 6.Kd4 Bf6+ 7.Kc4 Bh4 8.Kb3 Bg3 9.Kc3 Be1+
  +-  (9.16 --)   Depth: 44/51   00:00:02  2733kN
1.Kg2 Bc3 2.Kf2 Bf6 3.Ke3 Bh8 4.Ke4 Bf6 5.Kd5 Be7 6.Kd4 Bf6+ 7.Kc4 Bh4 8.Kb3 Bg3 9.Kc3 Be1+
  +-  (9.16 --)   Depth: 44/51   00:00:02  2733kN
1.Kg2 Bc3 2.Kf2 Bf6 3.Kg1 Bd4+ 4.Kf1 Bf6 5.Ke1 Bc3+ 6.Kd1 Bg7 7.Kc2 Bh6 8.Kd1 Bf4 9.Ke1 Be5
  =  (0.00)   Depth: 61/69   00:00:02  4686kN
1.Kg2 Bc3 2.Kf2 Bf6 3.Kg1 Bd4+ 4.Kf1 Bf6 5.Ke1 Be5 6.Kd2 Bf4+ 7.Kd1 Be5 8.Kd2
  =  (0.00)   Depth: 62/69   00:00:02  4960kN

Houdini 2.0c Pro x64:

1.Kg2 Bd4 2.Kf3 Bf6 3.Ke4 Bb2 4.Kd5 Ba3 5.Ke5 Bc5 6.Ke4 Be7 7.Kd5 Bb4 8.Ke6 Bc5 9.Kf5 Bf2 
  +-  (10.72)   Depth: 25/36   00:00:01  553kN

1.Kg2 Bd4 2.Kf3 Bf6 3.Ke4 Bb2 4.Kd5 Ba3 5.Ke5 Bc5 6.Ke4 Be7 7.Kd5 Bf6 8.Kc4 Bg7 9.Kd3 Ba1
  +-  (1.84)   Depth: 39/42   00:00:02  9314kN
1.Kg2 Bd4
  +-  (1.73 --)   Depth: 40/42   00:00:02  9379kN
1.Kg2 Bd4
  +-  (1.73 --)   Depth: 41/42   00:00:02  11161kN
1.Kg2 Bd4
  +-  (1.73 --)   Depth: 46/42   00:00:03  17652kN
1.Kg2 Bd4 2.Kf3 Bf6 3.Ke4 Bb2 4.Kd5 Bf6 5.Kc5 Bc3 6.Kc4 Bb2 7.Kd3 Ba1 8.Ke3 Bc3 9.Ke4 Bg7
  +-  (1.84)   Depth: 46/42   00:00:03  19187kN
1.Kg2 Bf6
  +/-  (1.10 --)   Depth: 77/50   00:00:26  224mN
1.Kg2 Bf6
  =  (0.23 --)   Depth: 77/52   00:00:27  235mN
1.Kg2 Bf6 2.Kh3 Be7 3.Kg2 Bc5 4.Kg3 Bd6+ 5.Kf3 Be5 6.Ke3 Bb2 7.Kf2 Bc1 8.Kf1 Bg5 9.Kg2 Bh4 
  =  (0.00)   Depth: 77/55   00:00:27  241mN
1.Kg2 Bf6 2.Kh3 Be7 3.Kg2 Bc5 4.Kg3 Bd6+ 5.Kf3 Be5 6.Ke3 Bb2 7.Kf2 Bc1 8.Kf1 Bg5 9.Kg2 Bh4
  =  (0.00)   Depth: 78/55   00:00:27  242mN

Houdini 2.0c Pro x64: default settings

1.Kg2 Bf6 2.Kf3 Be5 3.Ke4 Bf6
  +-  (53.76)   Depth: 6/13   00:00:01  1kN
1.Kg2 Bf6 2.Kf3 Be5 3.Ke4 Bg7 4.Kd5 Bf8 5.Kc4 Bd6 6.Kb3 Be7 7.Kc3 Bc5 8.Kd3 Bd6 9.Kc4 Bf8
  +-  (53.86)   Depth: 99/87   00:00:03  20572kN

Deep Rybka 4.1 SSE42 x64:

1.Kg2 Bc3 2.Kf3 Bh8 3.Ke4 Bc3 4.Kd5 Bb4 5.Kd4 Bd2 6.Kc4[] Be3 7.Kd3 Bg5 8.Kc3 Be7 9.Kc2 Bf8
  +-  (40.35)   Depth: 36   00:00:01  144kN
1.Kg2 Bc3 2.Kf3 Bh8 3.Ke4 Bc3 4.Kd5 Bb4 5.Kd4 Be7 6.Kc3 Bf6+[] 7.Kc4 Be7 8.Kc3 Bf6+[] 9.Kc4 Be7
  +-  (40.35)   Depth: 53   00:02:53  103mN, tb=55

Zappa Mexico II:

1.Kg2 Be5 2.Kf3 Bd6 3.Ke4 Bc5 4.Kd3 Bb4 5.Ke3 Bd6 6.Kf3 Be5 7.Ke3 Bd6
  +-  (33.14)   Depth: 56/107   00:00:55  518mN
Parent - By Barnard (Bronze) Date 2012-04-04 02:09

>Deep Rybka 4.1 SSE42 x64:


>1.Kg2 Bc3 2.Kf3 Bh8 3.Ke4 Bc3 4.Kd5 Bb4 5.Kd4 Bd2 6.Kc4[] Be3 7.Kd3 Bg5 8.Kc3 Be7 9.Kc2 Bf8
>  +-  (40.35)   Depth: 36   00:00:01  144kN
>1.Kg2 Bc3 2.Kf3 Bh8 3.Ke4 Bc3 4.Kd5 Bb4 5.Kd4 Be7 6.Kc3 Bf6+[] 7.Kc4 Be7 8.Kc3 Bf6+[] 9.Kc4 Be7
>  +-  (40.35)   Depth: 53   00:02:53  103mN, tb=55


tb=55

can i know,in the name of god,how can rybka use tablebases in fortress with 12 pieces?so she totally not understand,and moves the king,lossing the endgame!bravo for rybka! :yell:
Parent - - By Permanent Brain (*****) Date 2012-04-04 02:13
Engine: Strelka 5.1 (64 MB)
by Jury Osipov
41.00   0:01   +101.97  1.Kh2 Be5+ 2.Kg2 Bd4 3.Kf3 Bf6 4.Kg4 Be5 5.Kf5 Bd4 6.Ke4 Bg7 7.Kd5 Bb2 8.Kc5 Bg7 9.Kc4 Ba1 10.Kd3 Bg7 11.Kc2 Bh8 12.Kb3 Bf6 13.Kb4 Bd4 14.Ka3 (439.436) 305
(...)
75.01   0:34   +102.33  1.Kh2 Be5+ 2.Kg2 Bd6 3.Kf3 Be5 4.Ke4 Bf6 5.Kf5 Bd4 6.Kg4 Be5 7.Kg5 Bg7 8.Kf4 Bf6 9.Ke4 Bg7 10.Kd5 Bb2 11.Kc5 Bg7 12.Kc4 Ba1 13.Kd3 Bg7 14.Kc2 (12.189.736) 354
best move: Kh1-h2 time: 0:34.413 min  n/s: 354.816  nodes: 12.189.736

This is a new horizon. :lol:
Parent - By Barnard (Bronze) Date 2012-04-04 02:17

>+102.33 


in the name of god... :eek: lets see if we add more queens if we can make grow up the score :lol:
Parent - - By Barnard (Bronze) Date 2012-04-04 02:28 Edited 2012-04-04 03:06
look at that:

QBk5/QRP5/QQP5/PPP5/8/2b5/8/7K w - - 0 1


1...Ac3 2.Rg1 Ad4+ 3.Rg2 Ae3 4.Rf3 Ag1 5.Rg3 Ad4 6.Rg4 Ae3 7.Rf5 Ag1 8.Re4 Af2 9.Rd3 Ag1 10.Re2 Ad4 11.Rf1 Ae3 12.Re1 Ag1 13.Rd2 Ad4 14.Rc2 Ae3 15.Rc3
  +-  (135.05)   Profundidad: 27   00:00:50  251kN

+-  (135.05)

:yell:

i think i found the highest fail

edit:chessbase GUI doesnt allow to add more queen's or pawns,so strelka wont grow up the score...but im sure that if chessbase allows to add more queens,strelka will increase the score much much more

edited2:i can add one more bishop,and the score is increased

QBk5/QRP3b1/QQP5/BPP5/1P6/8/8/7K w - - 0 1


1.Rg2 Ad4 2.Rg3 Ae5+ 3.Rh3 Af4 4.Rg4 Ae5 5.Rf3
  +-  (146.49)   Profundidad: 8   00:00:00  148kN

1.Rg2 Ac3 2.Rf3 Ae1 3.Rg4 Ac3 4.Rg5 Ae1 5.Rg6 Ad2 6.Rf5 Ae3 7.Rg4 Af4 8.Rh5 Ae3 9.Rh4 Ad2 10.Rg3 Ae1+ 11.Rf3 Ad2
  +-  (145.15)   Profundidad: 21   00:00:48  247kN

+-  (146.49)   :lol::lol::lol: if someone can find an highest fail :smile:

found myself:

QBk5/QRP3b1/QQP5/BRP5/1PP5/8/8/7K b - - 0 0


1...Af6 2.Rg2 Ad4 3.Rh2 Ag1+ 4.Rg3 Ae3 5.Rf3 Ad4 6.Rf4 Ag7 7.Re3 Ad4+ 8.Rf3 Af2 9.Rf4 Ag3+ 10.Re4 Af2 11.Rf5 Ag3 12.Re6 Ae1
  +-  (163.00)   Profundidad: 20   00:00:08  4kN

+-  (163.00)
Parent - - By Uly (Gold) [mx] Date 2012-04-04 03:02

> i think i found the highest fail


Nope, the highest fail still belongs to Rybka Beta and her jump from Black advantage -81.78 to White mates in 10. That is, if you managed to find an engine that gave a mate score to a drawn position, the fail would only be half as big as the record :smile:
Parent - - By Barnard (Bronze) Date 2012-04-04 03:08 Edited 2012-04-04 03:13
with highest fail,i mean the highest score in a draw position,or given the highest score and not being able to give check-mate

p.s.are you able to find an highest score than +-163.00? :smile:

p.s.2 sometimes8very rare,but can occur),and due to horizon effect,some engines think they are winning,and suddenly,they see are under check mate(or lossing),if they go enough deep...

so i agree what rybka had is a fail,but it can be perfectly a horizon effect (rare with that high score,but it can be)
Parent - - By Uly (Gold) [mx] Date 2012-04-04 03:47
Well, "fail" is commonly used for moves that fail (that is, moves that fail low or fail high).

You probably have the record for highest misevaluation of a draw position (not counting bugs), yes.
Parent - By Barnard (Bronze) Date 2012-04-04 17:34
i expresed myself wrong

but yes,i meant the highest misevaluation of a draw position
Parent - - By Chess_Rambo (***) [at] Date 2012-04-04 07:40
It seems the last two positions are illegal. If you used three pawns to make three queens, where does the second bishop come from?
Parent - - By Permanent Brain (*****) Date 2012-04-04 09:05
A fine observation. I try to repair this:

QBk5/QRP3b1/BQP5/QRP5/PP6/8/8/7K w - -

But the eval is "smaller" here.

68.00   0:33   +159.78  1.Kh2 Bc3 2.Kg1 Bd4+ 3.Kf1 Bg7 4.Kf2 Bc3 5.Kg3 Be5+ 6.Kh3 Bd4 7.Kh4 Bc3 8.Kg4 Be5 9.Kf5 Bh8 10.Kf4 Bd4 11.Ke4 Bg7 12.Ke3 Bc3 13.Ke2 Be5 14.Kd1 (12.673.078) 373
best move: Kh1-h2 time: 0:33.946 min  n/s: 373.374  nodes: 12.673.078
Parent - By Barnard (Bronze) Date 2012-04-04 17:30
thanks for the observation(and repair) :smile:
Parent - By Barnard (Bronze) Date 2012-04-04 17:35
thanks for the observation :smile:
Parent - By h.g.muller (***) [nl] Date 2012-04-04 11:07
The following position is evaluated by Houdini 1.5 as ~ +8.5, while it is totally lost. Note that no trapping of pieces is involved here: all white Queens are optimally active. QueeNy wins this position against Houdini > 95% of the time, however.

1nnnknn1/3ppp2/2n2n2/8/8/8/3PPP2/1Q1QK1Q1 w - - 0 1
Parent - - By Peter Grayson (***) [gb] Date 2012-04-04 17:32
Worst evaluation error ever must be by Rybka 2.3.2a MP 64 bit in this actual game when as White it blunders away the win at move 92 by playing Kf6 instead of Bd7. In analysis I gave it a little extra time and it started to make mate announcements in the drawn position. Difficult to see what could be worse particularly as this was from an actual game and not a constructed position.

PeterG

At move 92 in the attached game, Rybka 2.3.2a MP blunders away the win and given a little extra time starts announcing mate in a drawn position. 92.Bd7 must be played to retain the win.

7k/1r2KR2/4B3/6pP/8/7P/8/8 w - - 0 92


[Event "Rated game, 3m + 0s"]
[Site "Engine Room"]
[Date "2008.01.01"]
[Round "?"]
[White "Mr vegas, Rybka 2.3.2a mp"]
[Black "Gray Blitz, Rybka 2.3.2a mp"]
[Result "1/2-1/2"]
[ECO "B80"]
[WhiteElo "2646"]
[BlackElo "2682"]
[Annotator "1.01;0.03"]
[PlyCount "311"]
[EventDate "2008.12.22"]
[TimeControl "180"]

{Rybka 2.3.2a mp: 15.7 ply; 213kN/s AMD Athlon(tm) 64 X2 Dual Core Processor
4800+ 2400MHz, (2 threads), GB071230.ctg, ð`[} 1. e4 {[%eval 0,0] [%emt 0:00:
00]} c5 {[%eval 0,0] [%emt 0:00:00]} 2. Nf3 {[%eval 0,0] [%emt 0:00:00]} d6 {
[%eval 0,0] [%emt 0:00:00]} 3. d4 {[%eval 0,0] [%emt 0:00:00]} cxd4 {[%eval 0,
0] [%emt 0:00:00]} 4. Nxd4 {[%eval 0,0] [%emt 0:00:00]} Nf6 {[%eval 0,0] [%emt
0:00:00]} 5. Nc3 {[%eval 0,0] [%emt 0:00:00]} a6 {[%eval 0,0] [%emt 0:00:00]}
6. Be3 {[%eval 0,0] [%emt 0:00:00]} e6 {[%eval 0,0] [%emt 0:00:00]} 7. f3 {
[%eval 0,0] [%emt 0:00:00]} b5 {[%eval 0,0] [%emt 0:00:00]} 8. Qd2 {[%eval 0,0]
[%emt 0:00:00]} Nbd7 {[%eval 0,0] [%emt 0:00:00]} 9. g4 {[%eval 0,0] [%emt 0:
00:00]} b4 {[%eval 0,0] [%emt 0:00:00]} 10. Na4 {[%eval 0,0] [%emt 0:00:00]} h6
{[%eval 0,0] [%emt 0:00:00]} 11. O-O-O {[%eval 0,0] [%emt 0:00:00]} Ne5 {
[%eval 0,0] [%emt 0:00:00]} 12. Qxb4 {[%eval 0,0] [%emt 0:00:00]} Bd7 {[%eval
0,0] [%emt 0:00:00]} 13. Bf4 {[%eval 0,0] [%emt 0:00:00]} g5 {[%eval 3,13]
[%emt 0:00:05]} 14. Bd2 {[%eval 0,0] [%emt 0:00:00] (Bg3)} d5 {[%eval 9,13]
[%emt 0:00:05]} 15. Nc5 {[%eval 0,0] [%emt 0:00:00]} Rc8 {[%eval 36,12] [%emt
0:00:06]} 16. Ndb3 {[%eval 0,0] [%emt 0:00:00]} Nxf3 {[%eval 33,12] [%emt 0:00:
02]} 17. exd5 {[%eval 0,0] [%emt 0:00:00]} Bxc5 {[%eval 28,14] [%emt 0:00:06]}
18. Nxc5 {[%eval 0,0] [%emt 0:00:00]} Nxd5 {[%eval 27,14] [%emt 0:00:02]} 19.
Qe4 {[%eval 0,0] [%emt 0:00:00]} Rxc5 {[%eval 30,13] [%emt 0:00:01]} 20. Qxf3 {
[%eval 0,0] [%emt 0:00:00]} Qc7 {[%eval 31,12] [%emt 0:00:01]} 21. c4 {[%eval
0,0] [%emt 0:00:00] (Bd3)} Bb5 {[%eval 13,12] [%emt 0:00:05]} 22. b3 {[%eval 0,
0] [%emt 0:00:00]} Qe5 {[%eval 18,12] [%emt 0:00:01]} 23. Kb1 {[%eval 0,0]
[%emt 0:00:00]} Bc6 {[%eval 18,12] [%emt 0:00:01]} 24. Rg1 {[%eval 0,0] [%emt
0:00:00]} Nf4 {[%eval 58,14] [%emt 0:00:05]} 25. Qc3 {[%eval 0,0] [%emt 0:00:
00]} O-O {[%eval 57,15] [%emt 0:00:05]} 26. Re1 {[%eval 0,0] [%emt 0:00:00]}
Qxc3 {[%eval 60,14] [%emt 0:00:01]} 27. Bxc3 {[%eval 0,0] [%emt 0:00:00]} Rb8 {
[%eval 64,14] [%emt 0:00:03]} 28. Bd4 {[%eval 0,0] [%emt 0:00:00] (Kb2)} Ra5 {
[%eval 68,12] [%emt 0:00:01]} 29. Kb2 {[%eval 0,0] [%emt 0:00:00]} Rb7 {[%eval
82,13] [%emt 0:00:03]} 30. a3 {[%eval 0,0] [%emt 0:00:00]} Bd7 {[%eval 83,14]
[%emt 0:00:03]} 31. b4 {[%eval 0,0] [%emt 0:00:00] (Re5)} Kh7 {[%eval 98,13]
[%emt 0:00:04]} 32. Rd1 {[%eval 101,13] [%emt 0:00:07] (c5)} Ba4 {[%eval 144,
13] [%emt 0:00:03]} 33. Rd2 {[%eval 149,14] [%emt 0:00:01]} Be8 {[%eval 155,15]
[%emt 0:00:03]} 34. Bc3 {[%eval 192,16] [%emt 0:00:02]} Rb8 {[%eval 161,15]
[%emt 0:00:00]} 35. b5 {[%eval 186,16] [%emt 0:00:03] (Rd6)} Ra4 {[%eval 182,
14] [%emt 0:00:01]} 36. Be5 {[%eval 194,16] [%emt 0:00:01]} Rb7 {[%eval 189,15]
[%emt 0:00:02]} 37. Rd8 {[%eval 182,16] [%emt 0:00:02]} axb5 {[%eval 194,16]
[%emt 0:00:03]} 38. Rxe8 {[%eval 203,16] [%emt 0:00:03]} bxc4+ {[%eval 219,16]
[%emt 0:00:03]} 39. Kc2 {[%eval 224,16] [%emt 0:00:01]} Ng6 {[%eval 224,16]
[%emt 0:00:04]} 40. Bb2 {[%eval 235,16] [%emt 0:00:18]} Rc7 {[%eval 241,16]
[%emt 0:00:00] (Re7)} 41. Rg3 {[%eval 243,16] [%emt 0:00:06]} Rca7 {[%eval 252,
16] [%emt 0:00:09] (Ra6)} 42. h3 {[%eval 254,15] [%emt 0:00:04] (Be2)} Rc7 {
[%eval 252,14] [%emt 0:00:06]} 43. Re3 {[%eval 252,17] [%emt 0:00:00]} Ra6 {
[%eval 256,14] [%emt 0:00:01]} 44. Bg2 {[%eval 255,16] [%emt 0:00:02]} e5 {
[%eval 257,14] [%emt 0:00:00]} 45. Bxe5 {[%eval 256,15] [%emt 0:00:01]} Nxe5 {
[%eval 261,15] [%emt 0:00:00]} 46. R8xe5 {[%eval 261,16] [%emt 0:00:01]} Rca7 {
[%eval 263,15] [%emt 0:00:00]} 47. Kb2 {[%eval 261,15] [%emt 0:00:04]} Rb6+ {
[%eval 262,15] [%emt 0:00:00]} 48. Kc3 {[%eval 262,15] [%emt 0:00:04]} Rxa3+ {
[%eval 261,16] [%emt 0:00:05]} 49. Kxc4 {[%eval 262,17] [%emt 0:00:00]} Ra4+ {
[%eval 261,16] [%emt 0:00:01]} 50. Kc5 {[%eval 262,16] [%emt 0:00:01]} Rba6 {
[%eval 261,16] [%emt 0:00:01]} 51. Re7 {[%eval 263,15] [%emt 0:00:02]} R4a5+ {
[%eval 265,15] [%emt 0:00:06]} 52. Kd4 {[%eval 261,17] [%emt 0:00:00]} Kg6 {
[%eval 272,15] [%emt 0:00:02] (Ra4+)} 53. Be4+ {[%eval 269,12] [%emt 0:00:01]}
Kf6 {[%eval 272,16] [%emt 0:00:01]} 54. Rc7 {[%eval 272,14] [%emt 0:00:00]}
Ra4+ {[%eval 275,15] [%emt 0:00:01]} 55. Rc4 {[%eval 272,16] [%emt 0:00:02]}
Rxc4+ {[%eval 274,17] [%emt 0:00:00]} 56. Kxc4 {[%eval 272,17] [%emt 0:00:01]}
Ra4+ {[%eval 274,16] [%emt 0:00:02]} 57. Kc5 {[%eval 273,17] [%emt 0:00:00]}
Ra5+ {[%eval 275,16] [%emt 0:00:01]} 58. Kb4 {[%eval 273,17] [%emt 0:00:00]}
Ra7 {[%eval 276,16] [%emt 0:00:01]} 59. Rf3+ {[%eval 274,16] [%emt 0:00:00]
(Kb5)} Kg7 {[%eval 284,17] [%emt 0:00:02]} 60. Kc5 {[%eval 278,17] [%emt 0:00:
02] (Bd5)} Ra5+ {[%eval 279,15] [%emt 0:00:02]} 61. Kd6 {[%eval 284,18] [%emt
0:00:00]} Ra6+ {[%eval 284,15] [%emt 0:00:00]} 62. Bc6 {[%eval 284,18] [%emt 0:
00:00]} Kg6 {[%eval 284,17] [%emt 0:00:01]} 63. Kc5 {[%eval 293,17] [%emt 0:00:
00]} Ra5+ {[%eval 284,17] [%emt 0:00:01] (Ra7)} 64. Kd4 {[%eval 293,18] [%emt
0:00:02]} Ra7 {[%eval 284,18] [%emt 0:00:00] (Kg7)} 65. Be4+ {[%eval 294,17]
[%emt 0:00:01]} Kg7 {[%eval 284,20] [%emt 0:00:01]} 66. Bd5 {[%eval 293,18]
[%emt 0:00:00] (Rb3)} Kg6 {[%eval 285,17] [%emt 0:00:01]} 67. Ke5 {[%eval 293,
18] [%emt 0:00:00]} Rd7 {[%eval 288,16] [%emt 0:00:01] (Re7+)} 68. Rf6+ {
[%eval 293,17] [%emt 0:00:03]} Kg7 {[%eval 293,20] [%emt 0:00:00]} 69. Rf2 {
[%eval 293,17] [%emt 0:00:00] (Rf1)} Ra7 {[%eval 293,18] [%emt 0:00:06]} 70.
Rf3 {[%eval 293,20] [%emt 0:00:00] (Kd6)} Re7+ {[%eval 294,19] [%emt 0:00:01]}
71. Kd6 {[%eval 292,20] [%emt 0:00:03]} Ra7 {[%eval 294,22] [%emt 0:00:00]} 72.
Rf1 {[%eval 293,19] [%emt 0:00:03] (Rf2)} Ra6+ {[%eval 288,14] [%emt 0:00:00]}
73. Kc5 {[%eval 293,19] [%emt 0:00:02] (Ke5)} Ra5+ {[%eval 293,16] [%emt 0:00:
03] (Ra7)} 74. Kd4 {[%eval 293,19] [%emt 0:00:01]} Ra7 {[%eval 293,19] [%emt 0:
00:00]} 75. Rb1 {[%eval 293,18] [%emt 0:00:00] (Ke5)} Ra4+ {[%eval 288,14]
[%emt 0:00:00]} 76. Ke5 {[%eval 293,19] [%emt 0:00:01]} Rf4 {[%eval 293,17]
[%emt 0:00:00]} 77. Rb3 {[%eval 293,19] [%emt 0:00:03]} Rf1 {[%eval 305,17]
[%emt 0:00:00] (Rf2)} 78. Rf3 {[%eval 299,17] [%emt 0:00:02]} f6+ {[%eval 319,
17] [%emt 0:00:01]} 79. Kd4 {[%eval 325,17] [%emt 0:00:03] (Ke4)} Rd1+ {[%eval
316,17] [%emt 0:00:02]} 80. Rd3 {[%eval 333,19] [%emt 0:00:03]} Ra1 {[%eval
334,18] [%emt 0:00:00]} 81. Rb3 {[%eval 333,18] [%emt 0:00:01]} Rd1+ {[%eval
341,17] [%emt 0:00:00] (Ra4+)} 82. Kc5 {[%eval 337,18] [%emt 0:00:01]} Rc1+ {
[%eval 341,17] [%emt 0:00:00]} 83. Bc4 {[%eval 337,18] [%emt 0:00:00] (Kd6)}
Rh1 {[%eval 319,12] [%emt 0:00:00] (Rc2)} 84. Rb7+ {[%eval 380,14] [%emt 0:00:
03] (Bd5)} Kh8 {[%eval 357,12] [%emt 0:00:01] (Kf8)} 85. Kd6 {[%eval 461,13]
[%emt 0:00:00] (Kd5)} Re1 {[%eval 526,13] [%emt 0:00:06] (Rc1)} 86. Be6 {
[%eval 461,11] [%emt 0:00:00]} h5 {[%eval 529,10] [%emt 0:00:01] (Re3)} 87.
gxh5 {[%eval 534,11] [%emt 0:00:01]} Re5 {[%eval 530,10] [%emt 0:00:00] (Ra1)}
88. Rf7 {[%eval 463,9] [%emt 0:00:00]} Re2 {[%eval 550,9] [%emt 0:00:01] (Re1)}
89. Ke7 {[%eval 625,14] [%emt 0:00:02] (Rxf6)} (89. h6 {and Mate in 11.
Unfortunately Rybka cannot see it.}) 89... Rf2 {[%eval 591,10] [%emt 0:00:01]}
90. Rxf6 {[%eval 643,15] [%emt 0:00:02]} (90. h6 {still Mate in 10!}) 90... Rb2
{[%eval 701,14] [%emt 0:00:00] (Rxf6)} 91. Rf7 {[%eval 700,11] [%emt 0:00:01]
(Kf7)} Rb7+ {[%eval 701,11] [%emt 0:00:01] Diagram #} 92. Kf6 {[%eval 707,12]
[%emt 0:00:01] A blunder giving immediate draw!} ({Played out these moves} 92.
Kf6 {[%eval 32724,18] [%emt 0:01:11]} Rxf7+ {[%emt 0:01:27]} 93. Kxf7 {[%eval
32726,18] [%emt 0:00:00]} Kh7 {[%emt 0:01:28]} 94. Bd7 {[%eval 32734,16] [%emt
0:00:00]} Kh8 {[%emt 0:00:30] (Kh6)} 95. Be8 {[%eval 32730,14] [%emt 0:00:03]}
Kh7 {[%emt 0:00:39]} 96. h6 {[%eval 32728,16] [%emt 0:00:00]} Kh8 {[%emt 0:00:
22] (Kxh6)} 97. Bb5 {[%eval 32730,15] [%emt 0:00:03]} Kh7 {[%emt 0:00:15]} 98.
Be2 {[%eval 32732,14] [%emt 0:00:00]} Kh8 {[%emt 0:00:15] (Kxh6)} 99. Bh5 {
[%eval 32730,15] [%emt 0:00:07]} Kh7 {[%emt 0:00:23]} 100. Bd1 {[%eval 32730,
16] [%emt 0:00:00]} Kh8 {[%emt 0:00:13] (Kxh6)} 101. Kf8 {[%eval 32716,14]
[%emt 0:00:15]} Kh7 {[%emt 0:00:24]} 102. Bf3 {[%eval 32730,17] [%emt 0:00:23]}
Kh8 {[%emt 0:01:33] (Kxh6)} 103. Bh1 {[%eval 746,17] [%emt 0:05:30]} Kh7 {
[%emt 0:06:28]} 104. Be4+ {[%eval 700,18] [%emt 0:04:08]} Kh8 {[%emt 0:20:06]
(Kxh6)} 105. Ke7 {[%eval 698,17] [%emt 0:05:21]}) 92... Rxf7+ {[%eval 701,11]
[%emt 0:00:00]} 93. Kxf7 {[%eval 716,12] [%emt 0:00:01] (Bxf7)} Kh7 {[%eval
728,11] [%emt 0:00:00]} 94. Bf5+ {[%eval 758,11] [%emt 0:00:01]} Kh8 {[%eval
729,12] [%emt 0:00:00]} 95. Kg6 {[%eval 764,10] [%emt 0:00:00] (h6)} Kg8 {
[%eval 766,11] [%emt 0:00:02]} 96. Be6+ {[%eval 744,11] [%emt 0:00:00] (Kxg5)}
Kh8 {[%eval 722,10] [%emt 0:00:00] (Kf8)} 97. Bd7 {[%eval 744,11] [%emt 0:00:
01]} Kg8 {[%eval 761,13] [%emt 0:00:00]} 98. Bc6 {[%eval 708,10] [%emt 0:00:00]
(Ba4)} Kh8 {[%eval 761,11] [%emt 0:00:01] (Kf8)} 99. Be4 {[%eval 751,10] [%emt
0:00:02] (Ba4)} Kg8 {[%eval 702,11] [%emt 0:00:01]} 100. Bd5+ {[%eval 751,11]
[%emt 0:00:01] (Bh1)} Kh8 {[%eval 702,10] [%emt 0:00:00]} 101. Kf7 {[%eval 703,
12] [%emt 0:00:02] (Bc6)} Kh7 {[%eval 749,12] [%emt 0:00:01]} 102. Bc6 {[%eval
745,12] [%emt 0:00:00] (Be4+)} Kh8 {[%eval 709,11] [%emt 0:00:00] (Kh6)} 103.
Kg6 {[%eval 741,11] [%emt 0:00:01]} Kg8 {[%eval 702,12] [%emt 0:00:00]} 104. h6
{[%eval 702,10] [%emt 0:00:00] (Bd5+)} Kh8 {[%eval 723,10] [%emt 0:00:01]} 105.
Bd7 {[%eval 749,11] [%emt 0:00:01] (Ba8)} Kg8 {[%eval 702,11] [%emt 0:00:01]}
106. Bc8 {[%eval 712,11] [%emt 0:00:01] (Be8)} Kh8 {[%eval 751,11] [%emt 0:00:
00]} 107. Bf5 {[%eval 715,11] [%emt 0:00:00] (h7)} Kg8 {[%eval 723,9] [%emt 0:
00:00]} 108. Bc2 {[%eval 712,11] [%emt 0:00:01] (Be6+)} Kh8 {[%eval 703,10]
[%emt 0:00:00]} 109. Bd3 {[%eval 715,11] [%emt 0:00:01] (h7)} Kg8 {[%eval 755,
10] [%emt 0:00:00]} 110. Bf5 {[%eval 709,12] [%emt 0:00:01] (Kxg5)} Kh8 {
[%eval 702,9] [%emt 0:00:00]} 111. Bb1 {[%eval 702,12] [%emt 0:00:02] (Bd7)}
Kg8 {[%eval 709,9] [%emt 0:00:00]} 112. Bd3 {[%eval 702,11] [%emt 0:00:01]
(h7+)} Kh8 {[%eval 730,10] [%emt 0:00:00]} 113. Kh5 {[%eval 710,11] [%emt 0:00:
00] (Be4)} Kg8 {[%eval 693,10] [%emt 0:00:00]} 114. Be4 {[%eval 702,11] [%emt
0:00:00] (Bg6)} Kh8 {[%eval 694,12] [%emt 0:00:00]} 115. Kg6 {[%eval 694,12]
[%emt 0:00:00]} Kg8 {[%eval 694,11] [%emt 0:00:00]} 116. Bg2 {[%eval 721,11]
[%emt 0:00:00] (Kxg5)} Kh8 {[%eval 702,10] [%emt 0:00:00]} 117. Bd5 {[%eval
702,12] [%emt 0:00:01] (Bf1)} g4 {[%eval 511,20] [%emt 0:00:04]} 118. h4 {
[%eval 0,28] [%emt 0:00:00]} g3 {[%eval 509,28] [%emt 0:00:04]} 119. Be4 {
[%eval 0,32] [%emt 0:00:01] (Bg2)} g2 {[%eval 0,7] [%emt 0:00:00]} 120. Bxg2 {
[%eval 0,35] [%emt 0:00:00]} Kg8 {[%eval 0,1] [%emt 0:00:00]} 121. Kh5 {[%eval
0,1] [%emt 0:00:00]} Kh7 {[%eval 0,1] [%emt 0:00:00]} 122. Bh1 {[%eval 0,1]
[%emt 0:00:00]} Kh8 {[%eval 0,1] [%emt 0:00:00]} 123. Kg5 {[%eval 0,1] [%emt 0:
00:00]} Kh7 {[%eval 0,1] [%emt 0:00:00]} 124. Bg2 {[%eval 0,1] [%emt 0:00:00]}
Kh8 {[%eval 0,1] [%emt 0:00:00]} 125. Bf1 {[%eval 0,1] [%emt 0:00:00]} Kg8 {
[%eval 0,1] [%emt 0:00:00]} 126. Bd3 {[%eval 0,1] [%emt 0:00:00]} Kh8 {[%eval
0,1] [%emt 0:00:00]} 127. Bf5 {[%eval 0,1] [%emt 0:00:00]} Kg8 {[%eval 0,1]
[%emt 0:00:00]} 128. Be4 {[%eval 0,1] [%emt 0:00:00]} Kh8 {[%eval 0,1] [%emt 0:
00:00]} 129. Kf6 {[%eval 0,1] [%emt 0:00:00]} Kg8 {[%eval 0,1] [%emt 0:00:00]}
130. Bd3 {[%eval 0,1] [%emt 0:00:00]} Kh8 {[%eval 0,1] [%emt 0:00:00]} 131. Bg6
{[%eval 0,1] [%emt 0:00:00]} Kg8 {[%eval 0,1] [%emt 0:00:00]} 132. Ke6 {[%eval
0,1] [%emt 0:00:00]} Kh8 {[%eval 0,1] [%emt 0:00:00]} 133. Ke5 {[%eval 0,1]
[%emt 0:00:00]} Kg8 {[%eval 0,1] [%emt 0:00:00]} 134. Ke6 {[%eval 0,1] [%emt 0:
00:00]} Kh8 {[%eval 0,1] [%emt 0:00:00]} 135. Kd5 {[%eval 0,1] [%emt 0:00:00]}
Kg8 {[%eval 0,1] [%emt 0:00:00]} 136. Kc4 {[%eval 0,1] [%emt 0:00:00]} Kh8 {
[%eval 0,1] [%emt 0:00:00]} 137. Kc5 {[%eval 0,1] [%emt 0:00:00]} Kg8 {[%eval
0,1] [%emt 0:00:00]} 138. Kd6 {[%eval 0,1] [%emt 0:00:00]} Kh8 {[%eval 0,1]
[%emt 0:00:00]} 139. Kc5 {[%eval 0,1] [%emt 0:00:00]} Kg8 {[%eval 0,1] [%emt 0:
00:00]} 140. Kb5 {[%eval 0,1] [%emt 0:00:00]} Kh8 {[%eval 0,1] [%emt 0:00:00]}
141. Kc4 {[%eval 0,1] [%emt 0:00:00]} Kg8 {[%eval 0,1] [%emt 0:00:00]} 142. Kb4
{[%eval 0,1] [%emt 0:00:00]} Kh8 {[%eval 0,1] [%emt 0:00:00]} 143. Kb5 {[%eval
0,1] [%emt 0:00:00]} Kg8 {[%eval 0,1] [%emt 0:00:00]} 144. Ka4 {[%eval 0,1]
[%emt 0:00:00]} Kh8 {[%eval 0,1] [%emt 0:00:00]} 145. Kb3 {[%eval 0,1] [%emt 0:
00:00]} Kg8 {[%eval 0,1] [%emt 0:00:00]} 146. Ka4 {[%eval 0,1] [%emt 0:00:00]}
Kh8 {[%eval 0,1] [%emt 0:00:00]} 147. Be4 {[%eval 0,1] [%emt 0:00:00]} Kg8 {
[%eval 0,1] [%emt 0:00:00]} 148. Ka5 {[%eval 0,1] [%emt 0:00:00]} Kh8 {[%eval
0,1] [%emt 0:00:00]} 149. Kb4 {[%eval 0,1] [%emt 0:00:00]} Kg8 {[%eval 0,1]
[%emt 0:00:00]} 150. Kb5 {[%eval 0,1] [%emt 0:00:00]} Kh8 {[%eval 0,1] [%emt 0:
00:00]} 151. Kc5 {[%eval 0,1] [%emt 0:00:00]} Kg8 {[%eval 0,1] [%emt 0:00:00]}
152. Kb4 {[%eval 0,1] [%emt 0:00:00]} Kh8 {[%eval 0,1] [%emt 0:00:00]} 153. Kc3
{[%eval 0,1] [%emt 0:00:00]} Kg8 {[%eval 0,1] [%emt 0:00:00]} 154. Kb4 {[%eval
0,1] [%emt 0:00:00]} Kh8 {[%eval 0,1] [%emt 0:00:00]} 155. Kc3 {[%eval 0,1]
[%emt 0:00:00]} Kg8 {[%eval 0,1] [%emt 0:00:00]} 156. Kb4 {[%eval 0,1] [%emt 0:
00:00]} 1/2-1/2
Parent - - By Gambit-man (**) Date 2012-04-08 22:17
here is the game that i originally posted about. this is the first time i've attempted to post a game on here, i hope all works well...

[Event "EngTourn-772"]
[Site "Livingston"]
[Date "2012.04.03"]
[Round "16.5"]
[White "Strelka 5.1"]
[Black "IvanHoe 9.47b x64"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2957"]
[BlackElo "2958"]
[Annotator "1.09;0.17"]
[PlyCount "269"]
[EventDate "2012.03.26"]
[EventType "tourn"]
[Source "Kerr"]
[TimeControl "120+6"]

{AMD Athlon(tm) 7750 Dual-Core Processor 2700 MHz  W=20.3 plies; 1,691kN/s;
Aurorae1.0.ctg  B=21.0 plies; 2,849kN/s; Aurorae1.0.ctg} 1. e4 {[%eval 0,0]
[%emt 0:00:00]} c5 {[%eval 0,0] [%emt 0:00:00]} 2. Nf3 {[%eval 0,0] [%emt 0:00:
00]} d6 {[%eval 0,0] [%emt 0:00:00]} 3. d4 {[%eval 0,0] [%emt 0:00:00]} cxd4 {
[%eval 0,0] [%emt 0:00:00]} 4. Nxd4 {[%eval 0,0] [%emt 0:00:00]} Nf6 {[%eval 0,
0] [%emt 0:00:00]} 5. Nc3 {[%eval 0,0] [%emt 0:00:00]} a6 {[%eval 0,0] [%emt 0:
00:00]} 6. Be3 {[%eval 0,0] [%emt 0:00:00]} e5 {[%eval 0,0] [%emt 0:00:00]} 7.
Nb3 {[%eval 0,0] [%emt 0:00:00]} Be6 {[%eval 0,0] [%emt 0:00:00]} 8. f3 {
[%eval 0,0] [%emt 0:00:00]} Be7 {[%eval 0,0] [%emt 0:00:00]} 9. Qd2 {[%eval 0,
0] [%emt 0:00:00]} O-O {[%eval 0,0] [%emt 0:00:00]} 10. O-O-O {[%eval 0,0]
[%emt 0:00:00]} h5 {[%eval 17,20] [%emt 0:00:40]} 11. Kb1 {[%eval 109,19]
[%emt 0:00:24]} b5 {[%eval 24,19] [%emt 0:00:04] (Nbd7)} 12. h3 {[%eval 80,19]
[%emt 0:00:11]} h4 {[%eval 18,18] [%emt 0:00:03]} 13. Nd5 {[%eval 105,18]
[%emt 0:00:09]} Nxd5 {[%eval 30,20] [%emt 0:00:16]} 14. exd5 {[%eval 105,16]
[%emt 0:00:00]} Bf5 {[%eval 31,20] [%emt 0:00:05] (Xxd5)} 15. Qb4 {[%eval 97,
18] [%emt 0:00:13]} Bg5 {[%eval 18,19] [%emt 0:00:13]} 16. f4 {[%eval 110,19]
[%emt 0:00:10]} exf4 {[%eval 28,20] [%emt 0:00:22]} 17. Bxf4 {[%eval 144,18]
[%emt 0:00:11]} Qf6 {[%eval 24,20] [%emt 0:00:10] (Re8)} 18. Bxg5 {[%eval 145,
18] [%emt 0:00:08] (Bxd6)} Qxg5 {[%eval 11,16] [%emt 0:00:02]} 19. Nd4 {[%eval
153,19] [%emt 0:00:09] (Be2)} Be4 {[%eval 34,18] [%emt 0:00:03] (Nd7)} 20. Bd3
{[%eval 137,17] [%emt 0:00:09]} Bxd3 {[%eval 15,17] [%emt 0:00:03]} 21. Rxd3 {
[%eval 137,15] [%emt 0:00:00]} Qxg2 {[%eval 15,16] [%emt 0:00:00] (Xxd3)} 22.
Qe1 {[%eval 258,18] [%emt 0:00:15]} Nd7 {[%eval 30,20] [%emt 0:00:10]} 23. Rg1
{[%eval 295,18] [%emt 0:00:11]} Qxd5 {[%eval 102,20] [%emt 0:00:32] (Qh2)} 24.
Qxh4 {[%eval 329,17] [%emt 0:00:08]} g6 {[%eval 102,19] [%emt 0:00:00]} 25.
Rdg3 {[%eval 329,15] [%emt 0:00:00]} Qe5 {[%eval 116,20] [%emt 0:00:11] (Xxg6)}
26. Nc6 {[%eval 354,18] [%emt 0:00:08]} Qf6 {[%eval 131,20] [%emt 0:00:10]} 27.
Qh6 {[%eval 354,16] [%emt 0:00:00]} Ne5 {[%eval 115,20] [%emt 0:00:25] (Xxf6)}
28. Nxe5 {[%eval 386,15] [%emt 0:00:01]} dxe5 {[%eval 126,21] [%emt 0:00:20]}
29. Rxg6+ {[%eval 346,19] [%emt 0:00:09]} fxg6 {[%eval 124,21] [%emt 0:00:05]}
30. Rxg6+ {[%eval 346,18] [%emt 0:00:00]} Qxg6 {[%eval 124,20] [%emt 0:00:00]
(Xxg6)} 31. Qxg6+ {[%eval 346,17] [%emt 0:00:00]} Kh8 {[%eval 124,22] [%emt 0:
00:15]} 32. b4 {[%eval 333,20] [%emt 0:00:12]} Rfe8 {[%eval 123,21] [%emt 0:00:
06]} 33. Kc1 {[%eval 332,20] [%emt 0:00:11]} e4 {[%eval 123,21] [%emt 0:00:03]}
34. Kd2 {[%eval 337,19] [%emt 0:00:08]} Red8+ {[%eval 123,20] [%emt 0:00:02]}
35. Ke2 {[%eval 336,19] [%emt 0:00:09] (Ke3)} Rf8 {[%eval 123,20] [%emt 0:00:
08]} 36. Qh6+ {[%eval 314,18] [%emt 0:00:08]} Kg8 {[%eval 123,18] [%emt 0:00:
00]} 37. Ke3 {[%eval 314,19] [%emt 0:00:23]} Rfc8 {[%eval 123,19] [%emt 0:00:
02]} 38. Qe6+ {[%eval 324,18] [%emt 0:00:11] (Qg5+)} Kg7 {[%eval 123,19] [%emt
0:00:02]} 39. Qg4+ {[%eval 317,19] [%emt 0:00:10]} Kf8 {[%eval 123,20] [%emt 0:
00:03] (Kh8)} 40. Qf4+ {[%eval 310,19] [%emt 0:00:10]} Kg7 {[%eval 123,21]
[%emt 0:00:17]} 41. Qe5+ {[%eval 309,19] [%emt 0:00:07] (Qg5+)} Kh6 {[%eval
117,20] [%emt 0:00:12]} 42. Qd6+ {[%eval 307,19] [%emt 0:00:07] (Qf6+)} Kh5 {
[%eval 117,18] [%emt 0:00:02]} 43. Qd7 {[%eval 301,19] [%emt 0:00:12]} Kg6 {
[%eval 123,19] [%emt 0:00:11] (Kh6)} 44. h4 {[%eval 341,18] [%emt 0:00:16]
(Qg4+)} Rg8 {[%eval 134,19] [%emt 0:00:16] (Rd8)} 45. a4 {[%eval 353,18] [%emt
0:00:09]} Rab8 {[%eval 134,19] [%emt 0:00:06] (bxa4)} 46. axb5 {[%eval 365,17]
[%emt 0:00:16]} axb5 {[%eval 134,17] [%emt 0:00:00]} 47. Qg4+ {[%eval 361,20]
[%emt 0:00:09]} Kh6 {[%eval 141,21] [%emt 0:00:10]} 48. Qf5 {[%eval 365,21]
[%emt 0:00:07]} Rgc8 {[%eval 141,19] [%emt 0:00:02] (Rge8)} 49. Qf4+ {[%eval
400,19] [%emt 0:00:06]} Kg6 {[%eval 163,20] [%emt 0:00:14]} 50. Qxe4+ {[%eval
425,21] [%emt 0:00:19]} Kh5 {[%eval 159,22] [%emt 0:00:07] (Kh6)} 51. Kd2 {
[%eval 424,21] [%emt 0:00:06]} Re8 {[%eval 159,21] [%emt 0:00:01] (Rd8+)} 52.
Qf4 {[%eval 424,20] [%emt 0:00:09] (Qh7+)} Rg8 {[%eval 180,21] [%emt 0:00:10]}
53. Kc3 {[%eval 422,21] [%emt 0:00:08]} Rgc8+ {[%eval 180,21] [%emt 0:00:03]
(Kg6)} 54. Kb3 {[%eval 470,23] [%emt 0:00:08] (Kb2)} Rg8 {[%eval 188,22] [%emt
0:00:07]} 55. Kb2 {[%eval 493,22] [%emt 0:00:14]} Kg6 {[%eval 204,21] [%emt 0:
00:15]} 56. Qg5+ {[%eval 490,21] [%emt 0:00:09]} Kh7 {[%eval 216,22] [%emt 0:
00:11]} 57. Qh5+ {[%eval 494,21] [%emt 0:00:14]} Kg7 {[%eval 216,20] [%emt 0:
00:00]} 58. c4 {[%eval 515,19] [%emt 0:00:06]} bxc4 {[%eval 216,20] [%emt 0:00:
02]} 59. b5 {[%eval 510,19] [%emt 0:00:07]} Rgf8 {[%eval 216,20] [%emt 0:00:03]
} 60. Qe5+ {[%eval 537,19] [%emt 0:00:08]} Kg8 {[%eval 216,21] [%emt 0:00:08]}
61. Qd5+ {[%eval 535,20] [%emt 0:00:06]} Kh7 {[%eval 216,21] [%emt 0:00:14]}
62. Qe4+ {[%eval 552,20] [%emt 0:00:07]} Kg7 {[%eval 224,21] [%emt 0:00:12]}
63. Qd4+ {[%eval 552,20] [%emt 0:00:10]} Kg8 {[%eval 219,8] [%emt 0:00:01]
(Kh6)} 64. Kc2 {[%eval 566,19] [%emt 0:00:09] (Qxc4+)} Rb7 {[%eval 247,19]
[%emt 0:00:12]} 65. Qd5+ {[%eval 651,18] [%emt 0:00:06] (h5)} Rff7 {[%eval 275,
20] [%emt 0:00:07]} 66. h5 {[%eval 635,18] [%emt 0:00:08]} Rbd7 {[%eval 275,17]
[%emt 0:00:01] (Kh7)} 67. Qc6 {[%eval 672,18] [%emt 0:00:07]} Rc7 {[%eval 277,
17] [%emt 0:00:03] (Kf8)} 68. Qa8+ {[%eval 690,16] [%emt 0:00:00]} Kg7 {[%eval
283,18] [%emt 0:00:02] (Kf8)} 69. Qg2+ {[%eval 686,18] [%emt 0:00:06]} Kf6 {
[%eval 283,21] [%emt 0:00:07]} 70. b6 {[%eval 701,19] [%emt 0:00:08]} Rcd7 {
[%eval 283,20] [%emt 0:00:02] (Rce7)} 71. Qg4 {[%eval 701,20] [%emt 0:00:06]
(Qe4)} Ke5 {[%eval 283,21] [%emt 0:00:07]} 72. Kc3 {[%eval 702,20] [%emt 0:00:
06]} Rg7 {[%eval 283,21] [%emt 0:00:08]} 73. Qe2+ {[%eval 698,20] [%emt 0:00:
06]} Kd5 {[%eval 283,22] [%emt 0:00:07]} 74. Qxc4+ {[%eval 701,20] [%emt 0:00:
09]} Ke5 {[%eval 283,22] [%emt 0:00:03]} 75. h6 {[%eval 693,20] [%emt 0:00:05]
(Qe2+)} Rh7 {[%eval 283,21] [%emt 0:00:02] (Rge7)} 76. Qh4 {[%eval 697,20]
[%emt 0:00:08] (Qg4)} Kf5 {[%eval 283,23] [%emt 0:00:07]} 77. Qh5+ {[%eval 698,
22] [%emt 0:00:06]} Kf6 {[%eval 283,23] [%emt 0:00:02]} 78. Kb4 {[%eval 697,21]
[%emt 0:00:05] (Kc4)} Rb7 {[%eval 283,21] [%emt 0:00:02] (Rde7)} 79. Kb5 {
[%eval 697,22] [%emt 0:00:07] (Kc4)} Rbe7 {[%eval 283,20] [%emt 0:00:01] (Rbd7)
} 80. Kc4 {[%eval 697,22] [%emt 0:00:07] (Qg4)} Rb7 {[%eval 283,21] [%emt 0:00:
02] (Ref7)} 81. Kd5 {[%eval 701,22] [%emt 0:00:05] (Qg4)} Rbd7+ {[%eval 283,21]
[%emt 0:00:02]} 82. Kc5 {[%eval 701,23] [%emt 0:00:06]} Rb7 {[%eval 283,22]
[%emt 0:00:02] (Rde7)} 83. Qg4 {[%eval 702,23] [%emt 0:00:06]} Rbf7 {[%eval
283,22] [%emt 0:00:03] (Rbe7)} 84. Kd4 {[%eval 700,21] [%emt 0:00:05] (Kc4)}
Rd7+ {[%eval 283,22] [%emt 0:00:02] (Rb7)} 85. Kc4 {[%eval 697,23] [%emt 0:00:
06]} Rb7 {[%eval 283,23] [%emt 0:00:03] (Rde7)} 86. Qg3 {[%eval 698,24] [%emt
0:00:08] (Qh5)} Kf5 {[%eval 275,23] [%emt 0:00:08] (Rbe7)} 87. Qg2 {[%eval 701,
23] [%emt 0:00:05] (Kd4)} Rbe7 {[%eval 275,22] [%emt 0:00:04]} 88. Kd4 {[%eval
685,22] [%emt 0:00:05]} Rd7+ {[%eval 275,23] [%emt 0:00:04]} 89. Kc5 {[%eval
704,24] [%emt 0:00:08]} Rde7 {[%eval 275,23] [%emt 0:00:05]} 90. Qg3 {[%eval
701,22] [%emt 0:00:05] (Qc2+)} Re5+ {[%eval 275,21] [%emt 0:00:02]} 91. Kc4 {
[%eval 698,22] [%emt 0:00:05] (Kd4)} Re4+ {[%eval 275,23] [%emt 0:00:13] (Ree7)
} 92. Kd3 {[%eval 701,21] [%emt 0:00:05]} Ree7 {[%eval 275,23] [%emt 0:00:03]}
93. Qg1 {[%eval 706,22] [%emt 0:00:07] (Qf3+)} Rd7+ {[%eval 275,24] [%emt 0:00:
13]} 94. Kc4 {[%eval 699,23] [%emt 0:00:07]} Rde7 {[%eval 275,24] [%emt 0:00:
08] (Rdf7)} 95. Qg8 {[%eval 700,22] [%emt 0:00:07] (Qh2)} Rd7 {[%eval 275,23]
[%emt 0:00:08] (Re4+)} 96. Qa8 {[%eval 688,21] [%emt 0:00:06] (Qc8)} Kg5 {
[%eval 275,24] [%emt 0:00:10]} 97. Qh1 {[%eval 704,21] [%emt 0:00:05] (Qc6)}
Rdf7 {[%eval 275,23] [%emt 0:00:17] (Kg6)} 98. Kd4 {[%eval 686,20] [%emt 0:00:
05] (Qc6)} Rd7+ {[%eval 275,23] [%emt 0:00:09]} 99. Kc5 {[%eval 686,18] [%emt
0:00:00]} Rdf7 {[%eval 275,23] [%emt 0:00:03] (Xxd7)} 100. Kc4 {[%eval 689,21]
[%emt 0:00:07] (Qh3)} Rf4+ {[%eval 275,21] [%emt 0:00:02]} 101. Kd3 {[%eval
691,21] [%emt 0:00:05]} Rff7 {[%eval 275,22] [%emt 0:00:03] (Rd7+)} 102. Qc1+ {
[%eval 521,18] [%emt 0:00:05] (Kc3)} Kg6 {[%eval 275,22] [%emt 0:00:03]} 103.
Qc6+ {[%eval 517,19] [%emt 0:00:05]} Kg5 {[%eval 275,23] [%emt 0:00:04]} 104.
Kc3 {[%eval 511,19] [%emt 0:00:05] (Qh1)} Rd7 {[%eval 275,20] [%emt 0:00:02]}
105. Kb4 {[%eval 519,20] [%emt 0:00:05] (Qh1)} Rdf7 {[%eval 275,22] [%emt 0:00:
10] (Rhf7)} 106. Kc4 {[%eval 491,19] [%emt 0:00:07] (Qe6)} Rf4+ {[%eval 275,21]
[%emt 0:00:02]} 107. Kc3 {[%eval 494,19] [%emt 0:00:07] (Kd3)} Rff7 {[%eval
275,21] [%emt 0:00:04]} 108. Kb4 {[%eval 476,18] [%emt 0:00:05] (Qh1)} Rf4+ {
[%eval 275,20] [%emt 0:00:08] (Re7)} 109. Kc5 {[%eval 471,19] [%emt 0:00:05]
(Kb3)} Rf5+ {[%eval 239,20] [%emt 0:00:08]} 110. Kd4 {[%eval 471,17] [%emt 0:
00:00]} Rxh6 {[%eval 239,20] [%emt 0:00:05] (Xxf5)} 111. Qg2+ {[%eval 574,19]
[%emt 0:00:07]} Kf6 {[%eval 239,19] [%emt 0:00:00]} 112. Qe4 {[%eval 574,18]
[%emt 0:00:00]} Rh8 {[%eval 244,20] [%emt 0:00:03] (Xxf6)} 113. b7 {[%eval 579,
20] [%emt 0:00:07]} Rd8+ {[%eval 244,20] [%emt 0:00:02]} 114. Kc4 {[%eval 584,
22] [%emt 0:00:09]} Rb8 {[%eval 244,19] [%emt 0:00:00]} 115. Qc6+ {[%eval 569,
23] [%emt 0:00:06]} Kg5 {[%eval 246,22] [%emt 0:00:02]} 116. Qg2+ {[%eval 581,
24] [%emt 0:00:05]} Kf6 {[%eval 246,20] [%emt 0:00:00]} 117. Qe4 {[%eval 579,
24] [%emt 0:00:05]} Kg5 {[%eval 246,22] [%emt 0:00:02]} 118. Qe7+ {[%eval 575,
23] [%emt 0:00:05]} Kh5 {[%eval 246,23] [%emt 0:00:03]} 119. Qg7 {[%eval 574,
23] [%emt 0:00:05]} Rff8 {[%eval 246,23] [%emt 0:00:02]} 120. Kd5 {[%eval 587,
23] [%emt 0:00:06]} Rg8 {[%eval 246,23] [%emt 0:00:03]} 121. Qf7+ {[%eval 577,
24] [%emt 0:00:06] (Qe7)} Kg5 {[%eval 246,23] [%emt 0:00:02]} 122. Qe7+ {
[%eval 579,25] [%emt 0:00:10] (Kd6)} Kg6 {[%eval 246,24] [%emt 0:00:02] (Kg4)}
123. Qe6+ {[%eval 579,25] [%emt 0:00:07] (Qd6+)} Kg5 {[%eval 246,24] [%emt 0:
00:03]} 124. Qe3+ {[%eval 578,25] [%emt 0:00:09]} Kg6 {[%eval 246,24] [%emt 0:
00:02] (Kf5)} 125. Qb6+ {[%eval 581,24] [%emt 0:00:07] (Qg1+)} Kf5 {[%eval 246,
26] [%emt 0:00:11] (Kg5)} 126. Qf2+ {[%eval 581,25] [%emt 0:00:07]} Kg6 {
[%eval 246,26] [%emt 0:00:05] (Kg4)} 127. Qg3+ {[%eval 581,25] [%emt 0:00:06]
(Qg2+)} Kf5 {[%eval 246,26] [%emt 0:00:03] (Kh5)} 128. Qf3+ {[%eval 586,25]
[%emt 0:00:05]} Kg5 {[%eval 246,26] [%emt 0:00:02]} 129. Qa3 {[%eval 583,25]
[%emt 0:00:06] (Kd6)} Rbd8+ {[%eval 244,25] [%emt 0:00:15] (Kf6)} 130. Kc6 {
[%eval 577,23] [%emt 0:00:06]} Kf4 {[%eval 244,25] [%emt 0:00:02] (Kf5)} 131.
Qb4+ {[%eval 576,23] [%emt 0:00:05]} Ke5 {[%eval 244,25] [%emt 0:00:02] (Kf5)}
132. Qe1+ {[%eval 577,24] [%emt 0:00:06] (Qc3+)} Kf6 {[%eval 244,25] [%emt 0:
00:03] (Kf5)} 133. Qf1+ {[%eval 584,25] [%emt 0:00:07] (Kc7)} Ke6 {[%eval 244,
25] [%emt 0:00:03] (Ke5)} 134. Qe2+ {[%eval 579,25] [%emt 0:00:05]} Kf5 {
[%eval 244,26] [%emt 0:00:04]} 135. Qf2+ {[%eval 573,25] [%emt 0:00:06] (Kc7)}
1/2-1/2
Parent - By Peter Grayson (***) [gb] Date 2012-04-09 16:31
Game copies and pastes into GUI fine.

PeterG
Up Topic The Rybka Lounge / Computer Chess / Highest wrong evaluation by chess engine

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