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Up Topic The Rybka Lounge / Chess / Who can see this beautiful move?
- - By Gaмßito (****) [cr] Date 2007-02-11 10:03
Hi!

Look at this game!  It´s and old game from 1935.


[White "Glücksberg"]
[Black "Najdorf Miguel "]
[Result "0-1"]
[ECO "A85"]

1. d4 f5 2. c4 Nf6 3. Nc3 e6 4. Nf3 d5 5. e3 c6 6. Bd3 Bd6 7. O-O O-O 8. Ne2
Nbd7 9. Ng5 Bxh2+ 10. Kh1 Ng4 11. f4 Qe8 12. g3 Qh5 13. Kg2 Bg1!! 14. Nxg1 Qh2+
15. Kf3 e5!! 16. dxe5 Ndxe5!+ 17. fxe5 Nxe5+ 18. Kf4 Ng6+ 19. Kf3 f4 20. exf4 Bg4!+
21. Kxg4 Ne5+ 22. fxe5 h5# 0-1   Very, very Pretty!

In move 13 After White played his King to g2! there are a magical and very deep move that finished the game in Black favor.
It is a brilliant move, that still today programs, many strong programs are not available to understand neither to calculate in depth.

Here is the position :  
r1b2rk1/pp1n2pp/2p1p3/3p1pNq/2PP1Pn1/3BP1P1/PP2N1Kb/R1BQ1R2 b - - 0 13


 
What can i really play here?  Can your engine find the best move here, but all the logical line that win for Black after 12.Kg2 ?

Vas, why is this move so difficult to find for some programs??? 

Regards!

Gambitto
Parent - - By Hamlet (**) [fi] Date 2007-02-11 15:33
You have to realize that White blundered several times during this game. Without these blunders this move is not a winning move.

Here are examples:
14.Ne2xg1  ?!
Why not play:
Rybka 2.2 mp: 14.Ng5-f3 Bg1xe3 15.Rf1–h1 Qh5-e8 16.Qd1–b3 Qe8-e7 17.c4-c5 b7-b6 18.Nf3-h2 b6xc5 19.Nh2xg4 c5-c4 20.Bd3xc4 -0.78/16

16.d4xe5  ?!
Why not play:
Rybka 2.2 mp: 16.c4xd5 e5-e4+ 17.Bd3xe4 f5xe4+ 18.Kf3xe4 Nd7-b6 19.Ke4-d3 c6xd5 20.Kd3-c3 Bc8-f5 21.e3-e4 Rf8-c8+ 22.Kc3-b3 d5xe4 -1.71/15

21.Kf3xg4  ??
Why not play:
Rybka 2.2 mp: 21.Kf3-e3 Bg4xd1 22.Rf1xd1 Qh2xg3+ 23.Ng5-f3 Ng6xf4 24.Ke3-d4 Nf4-h3 25.Kd4-c3 Rf8xf3 26.Ng1xf3 Qg3xf3 27.Rd1–d2 Nh3-f2 -3.07/16

And finally. Rybka finds this move quite easily after 13.Kh1–g2 :

1: Glücksberg - Najdorf Miguel
r1b2rk1/pp1n2pp/2p1p3/3p1pNq/2PP1Pn1/3BP1P1/PP2N1Kb/R1BQ1R2 b - - 0 1


Analysis by Rybka 2.2 mp:

13...Nd7-b6
  µ  (-0.73)   Depth: 2   00:00:00
13...Nd7-f6
  µ  (-0.96)   Depth: 2   00:00:00
13...Nd7-f6
  µ  (-0.83)   Depth: 3   00:00:00
13...Nd7-f6
  µ  (-0.93)   Depth: 4   00:00:00
13...Nd7-f6 14.Rf1-h1
  µ  (-0.82)   Depth: 5   00:00:00
13...Nd7-f6 14.Rf1-h1 d5xc4
  µ  (-0.83)   Depth: 6   00:00:00  19kN
13...Nd7-f6 14.Rf1-h1 d5xc4 15.Bd3xc4 b7-b5
  µ  (-0.73)   Depth: 7   00:00:00  26kN
13...Nd7-f6 14.Rf1-h1 d5xc4 15.Bd3xc4 b7-b5 16.Bc4-b3
  =  (-0.19)   Depth: 8   00:00:01  71kN
13...Nd7-b6 14.b2-b3 d5xc4 15.b3xc4 Rf8-f6 16.Bc1-d2
  ³  (-0.65)   Depth: 8   00:00:01  94kN
13...d5xc4 14.Bd3xc4 Nd7-b6 15.Bc4xe6+ Bc8xe6 16.Ng5xe6 Nb6-d5 17.Qd1-b3 Ng4xe3+ 18.Bc1xe3 Qh5xe2+ 19.Be3-f2
  µ  (-0.77)   Depth: 8   00:00:01  118kN
13...d5xc4 14.Bd3xc4 Nd7-b6 15.Qd1-b3 Nb6xc4 16.Qb3xc4 Rf8-f6 17.Rf1-h1
  µ  (-0.74)   Depth: 9   00:00:01  148kN
13...d5xc4 14.Bd3xc4 Nd7-b6 15.Qd1-b3 Nb6xc4 16.Qb3xc4 Rf8-f6 17.Rf1-h1 Bc8-d7
  ³  (-0.70)   Depth: 10   00:00:02  254kN
13...d5xc4 14.Bd3xc4 Nd7-b6 15.Qd1-b3 Nb6xc4 16.Qb3xc4 Rf8-f6 17.Rf1-h1 Bc8-d7 18.Bc1-d2
  µ  (-0.71)   Depth: 11   00:00:02  375kN
13...d5xc4 14.Bd3xc4 Nd7-b6 15.Qd1-b3 Nb6xc4 16.Qb3xc4 Rf8-f6 17.Rf1-h1 Bc8-d7 18.Bc1-d2 Rf6-h6
  ³  (-0.63)   Depth: 12   00:00:03  754kN
13...Nd7-f6 14.Rf1-h1 d5xc4 15.Bd3xc4 b7-b5 16.Bc4-b3 c6-c5 17.Bb3xe6+ Bc8xe6 18.Ng5xe6 Rf8-e8 19.d4-d5 Nf6-e4
  µ  (-0.83)   Depth: 12   00:00:10  2470kN
13...Nd7-f6 14.Rf1-h1 d5xc4 15.Bd3xc4 b7-b5 16.Bc4-b3 c6-c5 17.Bb3xe6+ Bc8xe6 18.Ng5xe6 Rf8-e8 19.d4-d5 Nf6-e4 20.Qd1-g1
  µ  (-0.76)   Depth: 13   00:00:12  2881kN
13...Nd7-f6 14.Rf1-h1 d5xc4 15.Bd3xc4 b7-b5 16.Bc4-b3 c6-c5 17.Bb3xe6+ Bc8xe6 18.Ng5xe6 Rf8-e8 19.d4-d5 Ra8-b8 20.a2-a4
  ³  (-0.64)   Depth: 14   00:00:14  3513kN
13...Nd7-f6 14.Ng5-f3 d5xc4 15.Bd3xc4 Nf6-e4 16.Bc4-d3 Rf8-f6 17.Bd3xe4 f5xe4 18.Nf3-h4 g7-g5 19.f4xg5 Rf6xf1 20.Qd1xf1
  ³  (-0.53)   Depth: 15   00:01:07  7651kN
13...Nd7-f6 14.Ng5-f3 d5xc4 15.Bd3xc4 Nf6-e4 16.Bc4-d3 Rf8-f6 17.Bd3xe4 f5xe4 18.Nf3-h4 g7-g5 19.f4xg5 Rf6xf1 20.Qd1xf1
  ³  (-0.53)   Depth: 16   00:01:07  13474kN
13...Nd7-f6 14.Ng5-f3 d5xc4 15.Bd3xc4 b7-b5 16.Bc4-b3 Nf6-e4 17.Bb3-c2 Rf8-f6 18.Bc2xe4 f5xe4 19.Nf3-h4 b5-b4 20.Qd1-c2
  ³  (-0.70)   Depth: 17   00:01:29  21513kN
13...Nd7-f6 14.Ng5-f3 d5xc4 15.Bd3xc4 b7-b5 16.Bc4-b3 Nf6-e4 17.Bb3-c2 Rf8-f6 18.Bc2xe4 f5xe4 19.Nf3-h4 Bc8-a6 20.b2-b4
  ³  (-0.64)   Depth: 18   00:02:16  29405kN
13...Nd7-f6 14.Ng5-f3 d5xc4 15.Bd3xc4 b7-b5 16.Bc4-b3 Nf6-e4 17.Bb3-c2 Rf8-f6 18.Bc2xe4 f5xe4 19.Nf3-h4 Bc8-a6 20.b2-b4
  ³  (-0.64)   Depth: 19   00:06:04  49148kN
13...Bh2-g1 14.Ng5-f3 Bg1xe3 15.Rf1-h1 Qh5-e8 16.Qd1-b3 Nd7-f6 17.Nf3-e5 d5xc4 18.Ne5xc4 Be3xc1 19.Ra1xc1 Nf6-d5 20.Nc4-e5
  ³  (-0.69)   Depth: 19   00:08:58  134mN
13...Bh2-g1 14.Ng5-f3 Bg1xe3 15.Rf1-h1 Qh5-e8 16.Qd1-b3 Nd7-f6 17.Nf3-e5 d5xc4 18.Ne5xc4 Be3xc1 19.Ra1xc1 b7-b5 20.Nc4-e5
  µ  (-0.75)   Depth: 20   00:10:32  157mN
13...Bh2-g1 14.Ng5-f3 Bg1xe3 15.Rf1-h1 Qh5-e8 16.Qd1-b3 Nd7-f6 17.Nf3-e5 d5xc4 18.Ne5xc4 Be3xc1 19.Ra1xc1 b7-b5 20.Nc4-e5
  µ  (-0.74)   Depth: 21   00:14:24  216mN

Regards,
Hamlet
Parent - By Gaмßito (****) [cr] Date 2007-02-11 21:28
Hello!

- You have to realize that White blundered several times during this game. Without these blunders this move is not a winning move. -

Bg1 is the best move for black after White plays his King to g2. White plays some inferior moves after this, but the position is also very critical for white after Kg2.

Like you said : Rybka 2.2 mp: 14.Ng5-f3 Bg1xe3 15.Rf1–h1 Qh5-e8 16.Qd1–b3 Qe8-e7 17.c4-c5 b7-b6 18.Nf3-h2 b6xc5 19.Nh2xg4 c5-c4 20.Bd3xc4 -0.78/16  is indeed a better line, but always it is very difficult for white to deffend.

16.c4xd5 e5-e4+ 17.Bd3xe4 f5xe4+ and here white is also very bad. 

21.Kf3-e3 Bg4xd1 22.Rf1xd1 Qh2xg3+ 23.Ng5-f3 Ng6xf4 24.Ke3-d4  This line is also loosing for white. There are no defense.


- And finally. Rybka finds this move quite easily after 13.Kh1–g2  -

No.. Rybka does not find this move quite easily. It takes about 8 minutes to see it is the best move : Bg1.

Look again your line :

13...Bh2-g1 14.Ng5-f3 Bg1xe3 15.Rf1-h1 Qh5-e8 16.Qd1-b3 Nd7-f6 17.Nf3-e5 d5xc4 18.Ne5xc4 Be3xc1 19.Ra1xc1 Nf6-d5 20.Nc4-e5
  ³  (-0.69)   Depth: 19   00:08:58   134mN

There are no way that the program can´t find this move in a blitz time game. Also in a tournament game time is difficult, but only if the program run in a very powerfull hardware.

Zap!chess also does not find this tactical move in a normal time.
 

   Regards!
 
   Gambitto
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