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Up Topic The Rybka Lounge / Test Positions / tactics cannot be very important for chess
- - By user923005 (****) Date 2019-10-29 16:53
I did an experiment (perhaps flawed because I used this net:128x10-2019_1026_0142_45_230.pb) and LC0 is really terrible at tactics on a Nvidia TI-1080.
The engine crashed once when I was analyzing, so I restarted at the point where analysis left off, and it did not crash a second time.

I am re-running the test with a 256 net 256x20-2019_0726_0906_48_558.pb

Since LC0 performed so terribly (I gave 12 minutes per position on a test set meant to run for 15 seconds per position) and is beaten by all the strong tactical engines by a landslide, I can only conclude that tactics are not very important for the game of chess.

On the other hand, if they are important, and they can somehow be compiled into an LC0 net, perhaps LC0 would become utterly unbeatable
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
Attachment: tactics.7z - data from analysis (432k)
Parent - - By dorszcz (**) Date 2019-10-29 20:51
Thanks for these interesting results. 12 minutes on quite strong GPU is a lot. I like when engines are becoming stronger, faster, just better, but at the same time I don't want chess to be solved. So the poor result of Lc0 which is about same strenght as Stockfish is not bad news. It only confirmes there is a lot of room for improvement in both tactics and positional chess. The level of perfect play in my opinion is far beyond of 4000-4500 ELO as I could read on the chess forums a few years ago.
Parent - - By MrKris (***) Date 2019-12-13 06:07

> The level of perfect play in my opinion is far beyond of 4000-4500 ELO as I could read on the chess forums a few years ago.


Yes, perfect would be the same as a 32-man wholegame database, I think I read that that would need more bytes than atoms in the observable universe.

- - - -

With this, Stockfish did much better than Lc0.

[Event "?"]
[Site "?"]
[Date "2019.12.12"]
[Round "?"]
[White "Stockfish_19112601c0"]
[Black ""]
[Result "1-0"]
[BlackElo "2400"]
[Time "20:48:07"]
[WhiteElo "2400"]
[TimeControl "1800+5"]
[SetUp "1"]
[FEN "n1QBq1k1/5p1p/5KP1/p7/8/8/8/8 w - - 0 1"]
[Termination "normal"]
[PlyCount "23"]
[WhiteType "human"]
[BlackType "human"]

1. Bc7 Qxc8 2. gxf7+ Kh8 3. Be5 Qc5 4. Bb2 (4. Ba1 {??} Nc7 5. Bb2 a4 6.
Ba1 a3 7. Be5 Qxe5+ {-+ black M12}) 4. .. Nc7 5. Ba1 a4 6. Bb2 a3 7. Ba1 a2
8. Bb2 a1=Q 9. Bxa1 Nd5+ 10. Ke6+ Nc3 11. Bxc3+ Qxc3 12. f8=Q# *


i7-4770K/RTX 2060

Latest Stockfish:
M12 at 05:42 (min.:sec)
@ PV=7 win in 1 sec., M12 in 2 secs.

Lc0 (net high rated at https://www.sp-cc.de/lc0-testing.htm):
win at 18:17
@ PV=7 win at <12 mins. (faster even though MCTS) -but no mate announcement at 1 1/2 hours-
Lc0 could not seem to get past 11.Bxc3+, 2 plies before the mate.
FEN: n1QBq1k1/5p1p/5KP1/p7/8/8/8/8 w - - 0 1
Stockfish_19112601c0:
...
 60/15  04:47   3,218,076k  11,197k   0.00  1.gxh7+ Kh8 2.Kf5 Qb5+ 3.Kf4 Qf1+ 4.Kg5 Qg2+ 5.Kf6 Kxh7 6.Qf5+ Qg6+ 7.Qxg6+ fxg6
 61/22+  05:42   3,842,093k  11,223k  +148.97  1.Bc7
 61/24+  05:42   3,842,095k  11,223k  +M12  1.Bc7
 61/24  05:42   3,842,108k  11,223k  +M12  1.Bc7 Qxc8 2.gxf7+ Kh8 3.Be5 Qc5 4.Bb2 Nc7 5.Ba1 a4 6.Bb2 a3 7.Ba1 a2 8.Bb2 a1R 9.Bxa1 Nd5+ 10.Ke6+ Nc3 11.Bxc3+ Qxc3 12.f8Q+

FEN: n1QBq1k1/5p1p/5KP1/p7/8/8/8/8 w - - 0 1
Stockfish_19112601c0:
...                  PV=7
---------------------------------------------------------------------------
 18/35  00:01   14,579k  8,028k  -9.16  1.Kf5 hxg6+ 2.Kg4 Nb6 3.Qb8 Nd7 4.Qc8 Ne5+ 5.Kg3 Nc6 6.Qa8 Nxd8 7.Kf2 a4 8.Qa5 Qd7 9.Ke2 Qd4 10.Qa8 Kg7 11.Qa5 Qb2+ 12.Ke1 a3 13.Qa7 Qa1+ 14.Ke2 a2
 18/28  00:01   14,579k  8,028k   0.00  1.Kg5 Qe5+ 2.Kh4 Qf4+ 3.Kh3 Qf3+ 4.Kh4 Qf2+ 5.Kg4 Qg2+ 6.Kf4 Qf1+ 7.Kg4 Qd1+ 8.Kh4 Qe1+
 18/14  00:01   14,579k  8,028k   0.00  1.Qb8 Qc6+ 2.Ke5 Qc3+ 3.Ke4 Qc2+ 4.Ke3 Qc1+ 5.Kf3 Qd1+ 6.Ke3 Qe1+ 7.Kf3
 18/11  00:01   14,579k  8,028k   0.00  1.gxf7+ Qxf7+ 2.Ke5 Qe8+ 3.Kd4 Nb6 4.Qg4+ Qg6 5.Qxg6+ hxg6
 18/7  00:01   14,579k  8,028k   0.00  1.Qxa8 hxg6 2.Qd5 Qe6+ 3.Qxe6 fxe6
 18/12  00:01   14,579k  8,028k   0.00  1.gxh7+ Kh8 2.Qxa8 Qe6+ 3.Kg5 Kxh7 4.Kh4 a4 5.Qa5 a3 6.Qxa3
 18/18  00:01   14,579k  8,028k  +147.92  1.Bc7 Qxc8 2.gxf7+ Kh8 3.Be5 Qc5 4.Bb2 Nc7 5.Ba1 a4 6.Bb2 a3 7.Ba1
---------------------------------------------------------------------------
 19/37  00:02   20,897k  8,777k  -12.40  1.Kf5 hxg6+ 2.Kg4 Nb6 3.Qb8 Nd7 4.Qa8 Ne5+ 5.Kh3 Nc6 6.Kg2 a4 7.Kf1 Nxd8 8.Kf2 Qd7 9.Kg1 Qd4+ 10.Kh1 Qb6 11.Kh2 Qd6+ 12.Kh3 a3 13.Kh4 Qd4+ 14.Kh3 Qe3+ 15.Kg4 a2 16.Qxd8+ Kg7
 19/14  00:02   20,897k  8,777k   0.00  1.Kg5 Qe5+ 2.Kh4 Qf4+ 3.Kh3 Qf3+ 4.Kh4
 19/14  00:02   20,897k  8,777k   0.00  1.Qb8 Qc6+ 2.Ke5 Qc3+ 3.Ke4 Qc2+ 4.Ke3 Qc1+ 5.Kf3 Qd1+ 6.Ke3
 19/11  00:02   20,897k  8,777k   0.00  1.gxf7+ Qxf7+ 2.Ke5 Qe8+ 3.Kd4 Nb6 4.Qg4+ Qg6 5.Qxg6+ hxg6
 19/7  00:02   20,897k  8,777k   0.00  1.Qxa8 hxg6 2.Qd5 Qe6+ 3.Qxe6 fxe6
 19/12  00:02   20,897k  8,777k   0.00  1.gxh7+ Kh8 2.Qxa8 Qe6+ 3.Kg5 Kxh7 4.Kh4 a4 5.Qa5 a3 6.Qxa3
 19/22  00:02   20,897k  8,777k  +M12  1.Bc7 Qxc8 2.gxf7+ Kh8 3.Be5 Qc5 4.Bb2 Nc7 5.Ba1 a4 6.Bb2 a3 7.Ba1 a2 8.Bb2 a1Q 9.Bxa1 Qe5+ 10.Bxe5

FEN: n1QBq1k1/5p1p/5KP1/p7/8/8/8/8 w - - 0 1
Lc0-.23_T40B.4-160:
...
 13/36  18:15   41,396k  38k  +0.01  1.gxh7+ Kh8 2.Qxa8 Qe6+ 3.Kg5 Kxh7 4.Qh1+ Kg7 5.Qa1+ f6+ 6.Bxf6+
 12/36  18:17   42,840k  39k  +128.00  1.Bc7 Qxc8 2.gxf7+ Kh8 3.Be5 Qc5 4.Bb2 Nc7 5.Ba1 a4 6.Bb2 a3 7.Ba1 a2 8.Bb2 a1B 9.Bxa1 Nd5+ 10.Ke6+ Nc3 11.Bxc3+
... (depth goes backwards with 1.Bc7, no mate announcement)
 5/36  21:20   145,533k  114k  +128.00  1.Bc7 Qxc8 2.gxf7+ Kh8 3.Be5 Qc5 4.Bb2 Nc7 5.Ba1 a4 6.Bb2 a3 7.Ba1 a2 8.Bb2 a1B 9.Bxa1 Nd5+ 10.Ke6+ Nc3 11.Bxc3+

FEN: n1QBq1k1/5p1p/5KP1/p7/8/8/8/8 w - - 0 1
Lc0-.23_T40B.4-160:  
...                 PV=7
---------------------------------------------------------------------------
 13/36  10:30   23,150k  37k  -5.38  1.Qc4 Qxd8+ 2.Kf5 hxg6+ 3.Kf4 Nb6 4.Qc8 Qxc8 5.Kg3 Qc1 6.Kf2
 13/36  10:30   23,150k  37k  -1.22  1.Bc7 Qxc8 2.gxf7+ Kh8 3.Be5 Qc5 4.Bb2 Nc7 5.Ba1 a4 6.Bb2 a3 7.Ba1 a2 8.Bb2 Nb5 9.Ke6+ Nc3 10.Bxc3+ Qxc3
 13/36  10:30   23,150k  37k  -0.38  1.Kg5 hxg6 2.Qxa8 a4 3.Kf4 a3 4.Qa5 Qe2 5.Bb6 Qc4+ 6.Ke3 Qe6+ 7.Kd2 Qa2+ 8.Ke3 Qb3+ 9.Kd2 Qb2+
 13/36  10:30   23,150k  37k  -0.17  1.Qb8 Qe6+ 2.Kg5 Qxg6+ 3.Kf4 Qh6+ 4.Kg3 Qe3+ 5.Kg2 Qe4+ 6.Kf2 Kg7 7.Qb2+ Kg8 8.Qb8 Qd4+ 9.Kf1
 13/36  10:30   23,150k  37k  -0.01  1.Qxa8 hxg6 2.Qd5 Kf8 3.Qd6+ Kg8 4.Bxa5 Qe4 5.Bb4 Qh4+ 6.Ke5 Qh2+ 7.Kd5 Qxd6+
 13/36  10:30   23,150k  37k  -0.02  1.gxf7+ Qxf7+ 2.Ke5 Qe8+ 3.Kf4 Nb6 4.Qg4+ Kf7 5.Qf5+ Kg8 6.Bxb6 Qf7 7.Bxa5
 13/36  10:30   23,150k  37k  +0.01  1.gxh7+ Kh8 2.Qxa8 Qe6+ 3.Kg5 Kxh7 4.Qh1+ Kg7 5.Qa1+ f6+ 6.Bxf6+
...
---------------------------------------------------------------------------
 6/36  12:32   62,896k  84k  -5.52  1.Qc4 Qxd8+ 2.Kf5 hxg6+ 3.Kf4 Nb6 4.Qc8 Qxc8 5.Kg3 Qc1 6.Kf2
 6/36  12:32   62,896k  84k  -0.38  1.Kg5 hxg6 2.Qxa8 a4 3.Kf4 a3 4.Qa5 Qe2 5.Bb6 a2 6.Bd4 Qf1+ 7.Ke3 Qg1+ 8.Kd3 Qf1+ 9.Ke3 Qg1+ 10.Kd3
 6/36  12:32   62,896k  84k  -0.16  1.Qb8 Qe6+ 2.Kg5 Qxg6+ 3.Kf4 Qh6+ 4.Kg3 Qe3+ 5.Kg2 Qe4+ 6.Kh2 Kg7 7.Qb2+ Kf8 8.Bxa5 Qf4+ 9.Kg2
 6/36  12:32   62,896k  84k   0.00  1.Qxa8 hxg6 2.Qd5 Kf8 3.Qd6+ Kg8 4.Bxa5 Qe4 5.Bb4 Qh4+ 6.Ke5 Qh2+ 7.Kd5 Qxd6+
 6/36  12:32   62,896k  84k  -0.02  1.gxf7+ Qxf7+ 2.Ke5 Qe8+ 3.Kf4 Nb6 4.Qg4+ Kf7 5.Bxb6 Qb8+ 6.Kf3 Qb7+ 7.Kg3 Qxb6
 6/36  12:32   62,896k  84k  +0.01  1.gxh7+ Kh8 2.Qxa8 Qe6+ 3.Kg5 Kxh7 4.Qh1+ Kg7 5.Qa1+ f6+ 6.Bxf6+
 6/36  12:32   62,896k  84k  +128.00  1.Bc7 Qxc8 2.gxf7+ Kh8 3.Be5 Qc5 4.Bb2 Nc7 5.Ba1 a4 6.Bb2 a3 7.Ba1 a2 8.Bb2 a1N 9.Bxa1 Nd5+ 10.Ke6+ Nc3 11.Bxc3+
...
------but no mate announcement:---------------------------------------------------------------------
 2/36  1:29:13   2,041,319k  381k  -7.40  1.Qc4 Qxd8+ 2.Ke5 hxg6 3.Qc8 Qxc8 4.Kf4 Qc1+ 5.Ke4 Qc2+ 6.Kf4 Qb1 7.Kg3
 2/36  1:29:13   2,041,319k  381k  -0.33  1.Kg5 hxg6 2.Qxa8 a4 3.Kf4 a3 4.Qa5 Qe2 5.Bb6 a2 6.Bd4 Qf1+ 7.Ke3 Qg1+ 8.Kd3 Qf1+ 9.Ke3 Qg1+ 10.Kd3 Qf1+ 11.Ke3
 2/36  1:29:13   2,041,319k  381k  -0.16  1.Qb8 Qe6+ 2.Kg5 Qxg6+ 3.Kf4 Qh6+ 4.Kg3 Qe3+ 5.Kg2 Qe4+ 6.Kh2 Kg7 7.Qb2+ Kf8 8.Bxa5 Qf4+ 9.Kg2
 2/36  1:29:13   2,041,319k  381k   0.00  1.Qxa8 hxg6 2.Qd5 Kf8 3.Qd6+ Kg8 4.Bxa5 Qe4 5.Bb4 Qh4+ 6.Ke5 Qh2+ 7.Kd5 Qxd6+
 2/36  1:29:13   2,041,319k  381k  -0.02  1.gxf7+ Qxf7+ 2.Ke5 Qe8+ 3.Kf4 Nb6 4.Qg4+ Kf7 5.Bxb6 Qb8+ 6.Kf3 Qb7+ 7.Kg3 Qxb6
 2/36  1:29:13   2,041,319k  381k  +0.01  1.gxh7+ Kh8 2.Qxa8 Qe6+ 3.Kg5 Kxh7 4.Qh1+ Kg7 5.Qa1+ f6+ 6.Bxf6+
 2/36  1:29:13   2,041,319k  381k  +128.00  1.Bc7 Qxc8 2.gxf7+ Kh8 3.Be5 Qc5 4.Bb2 Nc7 5.Ba1 a4 6.Bb2 a3 7.Ba1 a2 8.Bb2 a1N 9.Bxa1 Nd5+ 10.Ke6+ Nc3 11.Bxc3+


Parent - By McBrain (*) Date 2019-12-14 04:49 Upvotes 1
current dev- black diamond, next release will be  Stockfish 11 is release

37    #12   1.60G  0:48.32  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
36    #12   1.54G  0:46.46  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
35    #12   37.0M    0:02.24  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
34    #12   28.7M    0:01.86  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
33    #12   22.3M    0:01.55  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
32    #12   17.7M    0:01.30  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
31    #12   14.3M    0:01.11  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
30    #12   11.1M    0:00.94  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
29    #12   9.90M    0:00.86  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
28    #12   8.68M    0:00.78  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
27    #12   7.77M    0:00.69  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
26    #12   7.47M    0:00.67  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
25    #12   6.87M    0:00.63  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
24    #12   6.69M    0:00.61  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
23    #12   6.45M    0:00.59  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
22    #12   6.20M    0:00.56  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
21    #12   6.13M    0:00.56  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
20    #12   5.93M    0:00.54  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
19    #12   5.87M    0:00.54  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
18    #12   5.81M    0:00.53  Bc7 Qxc8 gxf7+ Kh8 Be5 Qc5 Bb2 Nc7 Ba1 a4 Bb2 a3 Ba1 a2 Bb2 a1=R Bxa1 Qc3+ Bxc3 Nd5+ Kg5+ Nxc3 f8=Q#
17    0.00   3.44M    0:00.37  gxh7+ Kh8 Qxa8 Qe6+ Kg5 Kxh7 Qh1+ Kg8 Qd1 Qe4 Kh5 f6 Qb3+ Kf8 Qb5 Kg8
16    0.00   2.60M    0:00.30  gxh7+ Kh8 Qxa8 Qe6+ Kg5 Kxh7 Qh1+ Kg8 Qd1 Qe4 Kh5 f6 Qb3+ Kf8 Qb5 Kg8
15    0.00   2.29M    0:00.26  gxh7+ Kh8 Qxa8 Qe6+ Kg5 Kxh7 Qh1+ Kg8 Qd1 Qe4 Kh5 f6 Qb3+ Kf8 Qb5 Kg8
14    0.00   1.41M    0:00.19  gxh7+ Kh8 Qxa8 Qe6+ Kg5 Kxh7 Qh1+ Kg8 Qd1 Qe4 Kh5 f6 Qb3+ Kf8 Qb5 Kg8
13    0.00   1.21M    0:00.17  gxh7+ Kh8 Qxa8 Qe6+ Kg5 Kxh7 Qh1+ Kg8 Qd1 Qe4 Kh5 f6 Qb3+ Kf8 Bxf6
12    0.00   973257  0:00.14  gxh7+ Kh8 Qxa8 Qe6+ Kg5 Kxh7 Qh1+ Kg8 Qd1 Qe4 Kh5 a4 Bg5 Qe5 Kh4 Qh2+ Kg4 f5+ Kxf5
11    0.00   816401  0:00.12  gxh7+ Kh8 Qxa8 Qe6+ Kg5 Kxh7 Qh1+ Kg8 Qd1 Qe4 Kh5 f6 Qb3+ Kf8 Bxf6
10    0.00   684307  0:00.10  gxh7+ Kh8 Qxa8 Qe6+ Kg5 Kxh7 Qh1+ Kg8 Qd1 Qe4 Kh5 f6 Qb3+ Kf8 Bxf6
  9    0.00   623424  0:00.10  gxh7+ Kh8 Qxa8 Qe6+ Kg5 Kxh7 Qh1+ Kg8 Qd1 Qe4 Kh5 a4 Qa1 a3 Qxa3
  8    0.00   391182  0:00.08  gxh7+ Kh8 Kf5 Qb5+ Kf4 Kxh7 Bf6 Qf1+ Ke5 Nb6 Qf5+ Qxf5+ Kxf5
  7    0.00   331892  0:00.07  gxh7+ Kh8 Kf5 Qb5+ Kf4 Kxh7 Bf6 Qf1+ Ke5 Nb6 Qf5+ Qxf5+ Kxf5
  6  +0.49   101930  0:00.04  gxh7+ Kh8 Qxa8 Qe6+ Kg5 Kxh7 Qh1+ Kg7 Qf3
  5  +0.37   60075    0:00.04  gxh7+ Kh8 Qxa8 Qe6+ Kg5 Qe5+ Kg4 Qd4+ Kg3
  4  +0.23   20570    0:00.02  gxh7+ Kh8 Qxa8 Qe6+ Kg5 Qe5+ Kg4 Kxh7
  3  +0.29   13126    0:00.01  gxh7+ Kh8 Qxa8 Qe6+ Kg5 Kxh7
  2  +0.29   8550      0:00.00  gxh7+ Kh8 Qxa8
  1  +0.31   3294      0:00.00  gxh7+ Kxh7
  0  #
Up Topic The Rybka Lounge / Test Positions / tactics cannot be very important for chess

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