Korchnoi-Svidler, St. Petersburg 1997

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jdart
Posts: 4366
Joined: Fri Mar 10, 2006 5:23 am
Location: http://www.arasanchess.org

Korchnoi-Svidler, St. Petersburg 1997

Post by jdart »

This was an incredible win by Korchnoi:

[Event "St Petersburg"]
[Site "St Petersburg"]
[Date "1997.04.23"]
[Round "7"]
[White "Kortschnoj, Viktor"]
[Black "Svidler, Peter"]
[Result "1-0"]
[ECO "E94"]
[WhiteElo "2635"]
[BlackElo "2640"]
[PlyCount "61"]
[EventDate "1997.04.17"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "RUS"]
[EventCategory "14"]
[Source "ChessBase"]
[SourceDate "1997.08.01"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Be2 d6 6. Nf3 e5 7. O-O Nbd7 8. Be3
Qe7 9. Qc2 Ng4 10. Bg5 f6 11. Bd2 c6 12. d5 f5 13. Ng5 Ndf6 14. f3 Nh6 15. c5
cxd5 16. Nxd5 Nxd5 17. Bc4 f4 18. Bxd5+ Kh8 19. h4 dxc5 20. Rac1 Ng8 21. Qxc5
h6 22. Qxe7 Nxe7 23. Nf7+ Kg8 24. Bb3 Rxf7 25. Rc7 Bf6 26. Bb4 Kg7 27. Rfc1 a5
28. Ba3 b5 29. Bc5 Ba6 30. Bxf7 Kxf7 31. h5 1-0

24. Bb3! was best (winning, in fact) but Nxh6+ was also good.

The interesting move for me is 27. Rfc1:

[D] r1b5/ppR1nrk1/5bpp/4p3/1B2Pp1P/1B3P2/PP4P1/5RK1 w - -

Rybka plays this on my quad in 17 seconds with a large + score (it also sees the followup 28. Ba3!). Rybka is amazing.

Crafty 23.1 does not find it even after 10 minutes. Crafty's PV is :

no 23 581270 +1 1982005958 1. h5 a5 2. Bd6 Ra6 3. Bxe7 Rxe7 4. Rxc8
gxh5 5. Rfc1 Rd6 6. Bd5 Red7 7. R1c7 b6
8. Kf2 Rxc7 9. Rxc7+ Kg6 10. Bf7+ Kg5 11.
Bd5 Kg6

Arasan has trouble with this too.
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zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Korchnoi-Svidler, St. Petersburg 1997

Post by zullil »

jdart wrote:
The interesting move for me is 27. Rfc1:

[D] r1b5/ppR1nrk1/5bpp/4p3/1B2Pp1P/1B3P2/PP4P1/5RK1 w - -

Rybka plays this on my quad in 17 seconds with a large + score (it also sees the followup 28. Ba3!). Rybka is amazing.
The official Stockfish-1.6.2 (just two threads on my 2GHz MacBook) finds Rfc1 in just 12 seconds. So Stockfish is amazing too. :D

Code: Select all

Searching: r1b5/ppR1nrk1/5bpp/4p3/1B2Pp1P/1B3P2/PP4P1/5RK1 w - -
infinite: 0 ponder: 0 time: 0 increment: 0 moves to go: 0
 2     -0.97   00:00      278 Bxf7 Kxf7 Bd6 Be6 
 2     -0.85   00:00      315 Rfc1 a5 Bxf7 Kxf7 Bxe7 
 3     -0.57   00:00      574 Rfc1 a5 Bxe7 Rxe7 Rxc8 Rxc8 Rxc8 Bxh4 Bd5 
 4     -0.57   00:00      994 Rfc1 a5 Bxe7 Rxe7 Rxc8 Rxc8 Rxc8 Bxh4 Bd5 
 5     -0.20   00:00     1504 Rfc1 a5 Bd6 Ra6 Bxe7 Rxe7 Rxc8 Bxh4 Bc4 Rb6 
 6  >  +0.81   00:00     2607 Rfc1 a5 Ba3 Bxh4 Bxf7 Kxf7 Bxe7 Bxe7 Rxc8 Rxc8 
                              Rxc8 b6 Kf2 Bc5+ Ke2 Bd4 Kd3 h5 Kc4 Kg7 Rc7+ Kf6 
                              Rc6+ Kg7 Kd5 g5 Ke6 Kg6 Rc8 g4 Rg8+ Kh7 Rg5 gxf3 
                              Kf7 Kh6 Rg6+ Kh7 gxf3 h4 
 7     +0.93   00:00     3252 Rfc1 a5 Ba3 Bxh4 Bxf7 Kxf7 Bxe7 Bxe7 Rxc8 Rxc8 
                              Rxc8 b6 Kf2 Bc5+ Ke2 Bd4 Kd3 h5 Kc4 Kg7 Rc7+ Kf6 
                              Rc6+ Kg7 Kd5 g5 Ke6 Kg6 Rc8 g4 Rg8+ Kh7 Rg5 gxf3 
                              Kf7 Kh6 Rg6+ Kh7 gxf3 h4 
 8     +0.24   00:00     6113 Rfc1 a5 Ba3 b5 Bxf7 b4 Bd5 Rb8 Rxc8 Rxc8 Rxc8 
                              Nxc8 
 8     +0.93   00:00     8938 Rd1 Bxh4 Bxf7 Kxf7 Bxe7 Bxe7 Rd8 b6 Rdxc8 Rxc8 
                              Rxc8 Kf6 Ra8 Bc5+ Kf1 
 9     +1.01   00:00    43401 Rd1 a5 Bd6 Nd5 Bxd5 Rxc7 Bxc7 Ra7 Bb6 Ra6 Bc7 Ra7 
10  <  +0.81   00&#58;00    56873 Rd1 a5 Bd6 a4 Bc4 b6 
11     +0.97   00&#58;00    94594 Rd1 a5 Bd6 Ra6 Bxf7 Rxd6 Rxd6 Kxf7 Rd8 Be6 Rxb7 
                              Bxa2 Ra8 Bxh4 Rxa5 Bc4 Rxe5 
12     +1.21   00&#58;00   159791 Rd1 a5 Bd6 Ra6 Bxf7 Rxd6 Rxd6 Kxf7 Rd8 Be6 Rxb7 
                              Bxa2 Ra8 Bxh4 Rxa5 Be6 Rxe5 Bf6 Ra5 Bd4+ Kf1 
13     +1.17   00&#58;00   221510 Rd1 a5 Bd6 Ra6 Bxf7 Rxd6 Rxd6 Kxf7 b3 Bxh4 Rd8 
                              Be6 Rxb7 h5 Kf1 a4 bxa4 Bc4+ Kg1 Be1 Rdd7 Bh4 
                              Rbc7 
14     +1.21   00&#58;00   471649 Rd1 a5 Bd6 Nd5 Bxd5 Rxc7 Bxc7 Kf8 Bc4 Kg7 a4 Kf8 
                              Kf1 Ke8 Ke2 Bd7 b3 Rc8 Bxa5 Bxa4 
15     +1.29   00&#58;00   868316 Rd1 a5 Bd6 Nd5 Bxd5 Rxc7 Bxc7 Kf8 Bc4 Kg7 a4 Kf8 
                              Kf1 Ke8 Ke2 Bd7 b3 Rc8 Bxa5 Bxh4 Bc3 
16     +1.21   00&#58;00    1630k Rd1 a5 Bd6 Nd5 Bxd5 Rxc7 Bxc7 Ra7 Rc1 Bd7 Kh2 h5 
                              g3 fxg3+ Kxg3 a4 Rc2 a3 Bb8 axb2 Rxb2 Ra6 Rxb7 
17     +1.29   00&#58;01    3239k Rd1 a5 Bd6 Nd5 Bxd5 Rxc7 Bxc7 Ra7 Rc1 Bd7 Kh2 h5 
                              g3 fxg3+ Kxg3 a4 Rc2 a3 Bb8 Ra8 Rc7 Rxb8 Rxd7+ 
                              Kh6 bxa3 Ra8 Rxb7 Rxa3 
18     +1.17   00&#58;03    7873k Rd1 a5 Bd6 Nd5 Bxd5 Rxc7 Bxc7 a4 Rc1 Kf8 Bd6+ Ke8 
                              Rc7 Ra6 Bb4 Kd8 Rh7 h5 Bc3 b5 Kf1 Be6 Rb7 Bxd5 
                              exd5 Rd6 Rxb5 Bxh4 Bxe5 
19     +1.17   00&#58;07   15123k Rd1 a5 Bd6 Nd5 Bxd5 Rxc7 Bxc7 a4 Rc1 Kf8 Bd6+ Ke8 
                              Rc7 Ra6 Bb4 Kd8 Rh7 h5 Bc3 b5 Kf1 Be6 Rb7 Bxd5 
                              exd5 Rd6 Rxb5 Bxh4 Bxe5 
20     +1.25   00&#58;11   24200k Rd1 a5 Bd6 Nd5 Bxd5 Rxc7 Bxc7 a4 Rc1 Kf8 Bd6+ Ke8 
                              Rc7 Ra6 Bb4 Kd8 Rh7 h5 Bc3 b5 Kf1 Be6 Rb7 Bd7 Ke2 
                              Ke7 a3 Bxh4 Bxe5 g5 
20  >  +1.37   00&#58;12   26838k Rfc1 a5 Ba3 b5 Bc5 Ba6 Bxf7 Kxf7 h5 gxh5 Bxe7 
                              Bxe7 R1c6 b4 Rxh6 Kg7 Re6 
21     +1.41   00&#58;16   35709k Rfc1 a5 Ba3 Bxh4 Bxf7 Kxf7 Bxe7 Bxe7 Rxc8 Rxc8 
                              Rxc8 b6 Kf2 Bc5+ Ke2 Bd4 Kd3 h5 Kc4 g5 Rh8 Kg6 
                              Rg8+ Kf6 b3 g4 fxg4 Kf7 Rg5 hxg4 Rxg4 Kf6 Kd3 
22     +1.41   00&#58;21   47462k Rfc1 a5 Ba3 Bxh4 Bxf7 Kxf7 Bxe7 Bxe7 Rxc8 Rxc8 
                              Rxc8 b6 Kf2 Bc5+ Ke2 Bd4 Kd3 h5 Kc4 g5 Rh8 Kg6 
                              Rg8+ Kf6 b3 g4 fxg4 Kf7 Rg5 hxg4 Rxg4 Kf6 Kd3 
23     +1.33   00&#58;28   65802k Rfc1 a5 Ba3 Bxh4 Bxf7 Kxf7 Bxe7 Bxe7 Rxc8 Rxc8 
                              Rxc8 b6 Kf2 Bc5+ Ke2 Bd4 Kd3 h5 Kc4 Kg7 Rc7+ Kf6 
                              Rc6+ Kg7 a3 g5 b4 axb4 axb4 g4 fxg4 hxg4 Kd5 f3 
24     +1.25   00&#58;48  114579k Rfc1 a5 Ba3 Bxh4 Bxf7 Kxf7 Bxe7 Bxe7 Rxc8 Rxc8 
                              Rxc8 b6 Kf2 Bc5+ Ke2 Bd4 Kd3 h5 Kc4 Kg7 Rc7+ Kf6 
                              Rc6+ Kg7 b4 axb4 Kxb4 g5 Rc7+ Kf6 Rc6+ Ke7 
25  >  +1.49   01&#58;49  255703k Rfc1 Bxh4 Bxf7 Kxf7 Bxe7 Bxe7 Rxc8 Rxc8 Rxc8 Bd6 
                              Kf1 a6 Ra8 Kf6 Ra7 
26     +1.49   02&#58;58  411770k Rfc1 a5 Ba3 Bxh4 Bxf7 Kxf7 Bxe7 Bxe7 Rxc8 Rxc8 
                              Rxc8 b6 Kf2 Bc5+ Ke2 Bd4 Rc7+ Kf6 Rh7 Kg5 b3 Bc5 
                              Rd7 Bd4 Kd3 Bc5 Rh7 Bd4 Rc7 b5 Rc6 a4 bxa4 bxa4 
                              Ra6 
27     +1.54   06&#58;00  826644k Rfc1 a5 Ba3 Bxh4 Bxf7 Kxf7 Bxe7 Bxe7 Rxc8 Rxc8 
                              Rxc8 b6 Kf2 Bc5+ Ke2 Bd4 Rc7+ Kf6 Rh7 Kg5 b3 Bc5 
                              Rd7 Bd4 Kd3 Bc5 Rh7 Bd4 Kc4 Bc5 Kd5 Bd4 Rc7 Kf6 
                              Rc6+ Kg5 a4 h5 
Nodes&#58; 1005590157
Nodes/second&#58; 2281563
Best move&#58; Rfc1
Ponder move&#58; a5
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ernst
Posts: 352
Joined: Thu Mar 09, 2006 6:00 pm

Re: Korchnoi-Svidler, St. Petersburg 1997

Post by ernst »

Funny as over here it needs 26 ply on 4 threads.

Code: Select all

20.01  0&#58;08   +1.09    1.Rd1 a5 2.Bd6 Nd5 3.Bxd5 Rxc7 
                       4.Bxc7 a4 5.Rc1 Kf8 6.Bd6+ Ke8 7.Rc7 Ra6 
                       8.Bb4 Kd8 9.Rh7 h5 10.Bc3 Be6 
                       11.Bxe6 Rxe6 12.Rxb7 Bxh4 13.Ra7 Rd6 
                       14.Kf1 &#40;51.941.307&#41; 5800 

21.01  0&#58;11   +1.09    1.Rd1 a5 2.Bd6 Nd5 3.Bxd5 Rxc7 
                       4.Bxc7 a4 5.Rc1 Kf8 6.Bd6+ Ke8 7.Rc7 Ra6 
                       8.Bb4 Kd8 9.Rh7 h5 10.Bc3 Be6 
                       11.Bxe6 Rxe6 12.Rxb7 Bxh4 13.Ra7 Rd6 
                       14.Kf1 &#40;68.817.940&#41; 5858 

22.01  0&#58;21   +1.29++  1.Rd1 Bxh4 2.Bxf7 Kxf7 3.Bxe7 Bxe7 
                       4.Rd8 Kf6 5.Rdxc8 Bd6 6.Rxa8 Bxc7 
                       7.Kf1 Bb6 8.Rb8 &#40;126.526.813&#41; 5889 

23.01  0&#58;29   +1.21    1.Rd1 a5 2.Bd6 Nd5 3.Bxd5 Rxc7 
                       4.Bxc7 a4 5.Rc1 Ra6 6.Bxe5 Bxe5 
                       7.Rxc8 Bxb2 8.Bxb7 Bd4+ 9.Kh2 Rb6 
                       10.Bd5 Kf6 11.Rc4 Bf2 12.Kh3 a3 
                       13.Rc3 Ke5 14.Rxa3 &#40;175.565.279&#41; 5989 

24.01  0&#58;51   +1.17    1.Rd1 a5 2.Bd6 Nd5 3.Bxd5 Rxc7 
                       4.Bxc7 a4 5.Rc1 Ra6 6.Bxe5 Bxe5 
                       7.Rxc8 h5 8.Rg8+ Kh6 9.Bxb7 Rb6 
                       10.Bd5 Bf6 11.b3 axb3 12.axb3 Bxh4 
                       13.Kf1 Bf6 14.Ke2 &#40;308.670.889&#41; 6034 

25.01  1&#58;25   +1.21    1.Rd1 a5 2.Bd6 Nd5 3.Bxd5 Rxc7 
                       4.Bxc7 a4 5.Rc1 Ra6 6.Bxe5 Bxe5 
                       7.Rxc8 h5 8.Kf2 Bxb2 9.g4 Rb6 10.Ke2 hxg4 
                       11.fxg4 Kh6 12.Kf3 g5 13.hxg5+ Kxg5 
                       14.Rf8 &#40;520.379.391&#41; 6096 

&#91;b&#93;25.06  1&#58;50   +1.53++  1.Rfc1 a5 2.Ba3 b5 3.Bc5 Ba6 4.Bxf7 Kxf7 
                       5.h5 Ke6 6.Rc2 gxh5 7.Bxe7 Bxe7 
                       8.R2c6+ Kf7 9.Rxh6 Kg7 10.Re6 &#40;673.815.418&#41; 6111 &#91;/b&#93;

26.01  2&#58;48   +1.53    1.Rfc1 a5 2.Ba3 Bxh4 3.Bxf7 Kxf7 
                       4.Bxe7 Bxe7 5.Rxc8 Rxc8 6.Rxc8 b6 
                       7.Kf1 Bc5 8.Rc7+ Kf6 9.Rc6+ Kg5 
                       10.b3 Bd4 11.Ke2 Bc5 12.Kd3 Bd4 
                       13.Kc4 Bc5 14.Kc3 &#40;1.031.797.042&#41; 6126 

best move&#58; Rf1-c1 time&#58; 3&#58;00.244 min  n/s&#58; 6.120.371  nodes&#58; 1.103.154.043
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zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Korchnoi-Svidler, St. Petersburg 1997

Post by zullil »

ernst wrote:Funny as over here it needs 26 ply on 4 threads.
Oops, I must have forgotten to clear hash after several previous runs. :oops:

Actually it takes about a minute and a half, at depth 23. Thanks for challenging my erroneous claim.

Code: Select all

Searching&#58; r1b5/ppR1nrk1/5bpp/4p3/1B2Pp1P/1B3P2/PP4P1/5RK1 w - -
infinite&#58; 0 ponder&#58; 0 time&#58; 0 increment&#58; 0 moves to go&#58; 0
 2     -0.97   00&#58;00      284 Bxf7 Kxf7 Bd6 
 2     -0.85   00&#58;00      420 Bd6 Kf8 Bxf7 Kxf7 
 3     -0.85   00&#58;00      745 Bd6 Kf8 Bxf7 Kxf7 
 3     -0.65   00&#58;00     1292 Rfc1 Bxh4 Bxe7 Rxe7 Rxc8 Rxc8 Rxc8 
 4     -0.65   00&#58;00     1806 Rfc1 Bxh4 Bxe7 Rxe7 Rxc8 Rxc8 Rxc8 
 5     -0.57   00&#58;00     3242 Rfc1 a5 Bxe7 Rxe7 Rxc8 Rxc8 Rxc8 Bxh4 
 6     -0.57   00&#58;00     4717 Rfc1 a5 Bxe7 Rxe7 Rxc8 Rxc8 Rxc8 Bxh4 
 7  >  -0.36   00&#58;00     8062 Rfc1 a5 Bd6 b5 Bxf7 Kxf7 h5 
 8     -0.08   00&#58;00    13997 Rfc1 a5 Bd6 Ra6 Bxe7 Rxe7 Rxe7+ Bxe7 Rxc8 a4 Bd5 
                              Bxh4 Bxb7 
 9     -0.24   00&#58;00    32414 Rfc1 a5 Bd6 Ra6 Bxe7 Rxe7 Rxe7+ Bxe7 Rxc8 Rc6 
                              Rxc6 bxc6 h5 gxh5 Kf2 Kf6 
10     -0.04   00&#58;00    57629 Rfc1 a5 Bd6 Ra6 Bxe7 Rxe7 Rxe7+ Bxe7 Rxc8 Rc6 
                              Rg8+ Kh7 Rb8 Rc7 Bd5 Bxh4 Rxb7 Rxb7 Bxb7 
11     -0.08   00&#58;00   177203 Rfc1 a5 Bd6 Ra6 Bxe7 Rxe7 Rxe7+ Bxe7 Rc7 Kf6 Rxc8 
                              Rb6 Ra8 Bb4 Kf1 Rc6 Ke2 
12     -0.16   00&#58;00   310827 Rfc1 a5 Bd6 Ra6 Bxe7 Rxe7 Rxe7+ Bxe7 Rc7 Kf6 Rxc8 
                              Rc6 Rxc6+ bxc6 Ba4 Bc5+ Kf1 Bd4 Ke2 Bxb2 Bxc6 Bd4 
12     +0.12   00&#58;00   485636 h5 a5 Ba3 b5 Bxf7 b4 Bxb4 axb4 hxg6 Ra5 Rfc1 Ba6 
                              Bd5 Kxg6 
13     +0.16   00&#58;01   589148 h5 a5 Ba3 b5 Bxf7 b4 Bxb4 axb4 hxg6 Ra5 Rfc1 Ba6 
                              Rd1 Nxg6 Rd6 Ne7 
14  <  -0.12   00&#58;01   838184 h5 a5 Bd6 Ra6 Bxe7 Be6 Bxf6+ Kxf6 
15     -0.04   00&#58;01    1514k h5 a5 Bd6 Ra6 Bxe7 Be6 Bxf6+ Kxf6 Rxf7+ Kxf7 
                              hxg6+ Kxg6 Bxe6 Rxe6 Rc1 a4 Kf2 Rb6 Rc2 Kg5 Ke2 
                              Kf6 Rd2 Rc6 
15  >  +1.05   00&#58;02    2989k Rd1 a5 Bd6 b6 Bxf7 Kxf7 Bxe7 Bxe7 Rd8 Bb7 Rdd7 
16     +1.33   00&#58;03    6576k Rd1 Bxh4 Bxf7 Kxf7 Rd8 b6 Bxe7 Bxe7 Rcxc8 Rxc8 
                              Rxc8 Kf6 Kf2 Bc5+ Ke2 Bd4 Rc6+ Kg5 b4 a5 bxa5 
                              bxa5 
17     +1.25   00&#58;04    7864k Rd1 Bxh4 Bxf7 Kxf7 Rd8 b6 Bxe7 Bxe7 Rcxc8 Rxc8 
                              Rxc8 Kf6 Kf2 Bc5+ Ke2 Kg5 Rc6 h5 Rc7 a5 Rc6 Bd4 
18     +1.37   00&#58;05   10816k Rd1 Bxh4 Bxf7 Kxf7 Rd8 b6 Bxe7 Bxe7 Rcxc8 Rxc8 
                              Rxc8 Kf6 Kf2 Bc5+ Ke2 Kg5 Rc6 h5 Kd3 Bd4 b4 h4 a4 
                              a5 bxa5 bxa5 
19     +1.21   00&#58;08   16660k Rd1 a5 Bd6 Nd5 Bxd5 Rxc7 Bxc7 Ra7 Rc1 Bd7 Kf1 a4 
                              Ke2 h5 Kd3 a3 b3 b5 Bb6 Ra6 Rc7 Rxb6 Rxd7+ Kh6 
20     +1.13   00&#58;21   45926k Rd1 a5 Bd6 Nd5 Bxd5 Rxc7 Bxc7 Ra6 Rc1 a4 Bxe5 
                              Bxe5 Rxc8 Bxb2 Rc7+ Kf6 Rxb7 Bd4+ Kh2 Rb6 Rh7 Rb1 
                              Rf7+ Ke5 Re7+ Kf6 Re6+ Kg7 Ra6 Bf2 
21     +1.13   00&#58;28   62421k Rd1 a5 Bd6 Nd5 Bxd5 Rxc7 Bxc7 Ra6 Rc1 a4 Bxe5 
                              Bxe5 Rxc8 Bxb2 Bxb7 Rb6 Bd5 Bf6 Rg8+ Kh7 Rf8 Bxh4 
                              Rf7+ Kh8 Rxf4 Bf6 Kf2 Rb2+ Kg3 Kg7 
22     +1.13   00&#58;40   92301k Rd1 a5 Bd6 Nd5 Bxd5 Rxc7 Bxc7 Ra6 Rc1 a4 Bxe5 
                              Bxe5 Rxc8 Bxb2 Bxb7 Rb6 Bd5 Bf6 Rc7+ Kf8 h5 gxh5 
                              Kf1 Ke8 Bc6+ Kd8 Rd7+ Kc8 Bxa4 Rb1+ Ke2 Rb2+ Rd2 
                              Rxd2+ Kxd2 
23     +1.05   01&#58;09  158117k Rd1 a5 Bd6 Nd5 Bxd5 Rxc7 Bxc7 Ra6 Rc1 a4 Bxe5 
                              Bxe5 Rxc8 Bxb2 Bxb7 Rb6 Bd5 Bd4+ Kh2 h5 Rg8+ Kf6 
                              Re8 Rb2 Re6+ Kg7 Re7+ Kf6 Re8 Rb6 g3 Rb2+ Kh3 
                              fxg3 Re6+ Kg7 Kxg3 Bf2+ Kh3 
23  >  +1.33   01&#58;26  200144k Rfc1 a5 Ba3 b5 Bc5 Ba6 Bxf7 Kxf7 h5 gxh5 Bxe7 
                              Bxe7 R1c6 b4 Rxh6 Kg7 Re6 
24     +1.58   01&#58;55  269264k Rfc1 a5 Ba3 Bxh4 Bxf7 Kxf7 Bxe7 Bxe7 Rxc8 Rxc8 
                              Rxc8 b6 Kf1 Bc5 Rc6 Bd4 Ke2 Kg7 Kd3 Kf7 Kc4 h5 
                              Kd5 h4 Rc7+ Kf6 Rc6+ Kf7 a4 g5 b3 Ke7 Re6+ Kf7 
25     +1.58   02&#58;32  355324k Rfc1 a5 Ba3 Bxh4 Bxf7 Kxf7 Bxe7 Bxe7 Rxc8 Rxc8 
                              Rxc8 b6 Kf1 Bc5 Ke2 h5 Kd3 Bd4 Kc4 g5 Rh8 Kg6 
                              Rg8+ Kf6 b3 Bc5 Rh8 Kg6 Kd5 Bd4 Rg8+ Kf6 Rf8+ Kg6 
                              Rd8 g4 Rd6+ Kg7 fxg4 hxg4 
26     +1.41   03&#58;38  512623k Rfc1 a5 Ba3 Bxh4 Bxf7 Kxf7 Bxe7 Bxe7 Rxc8 Rxc8 
                              Rxc8 b6 Kf2 Bc5+ Ke2 h5 Kd3 Kg7 Kc4 Bd4 Rc7+ Kf6 
                              Rc6+ Kg7 Kd5 g5 Ke6 Kg6 Rc8 g4 Rg8+ Kh7 Rg5 Kh6 
                              Kf5 b5 Rg6+ Kh7 Kg5 Bxb2 Rh6+ Kg7 Rxh5 gxf3 
Nodes&#58; 656179016
Nodes/second&#58; 2334425
Best move&#58; Rfc1
Ponder move&#58; a5
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User avatar
Eelco de Groot
Posts: 4563
Joined: Sun Mar 12, 2006 2:40 am
Full name:   

Rybka in danger? Re: Korchnoi-Svidler, St. Petersburg 1997

Post by Eelco de Groot »

[D]r1b5/ppR1nrk1/5bpp/4p3/1B2Pp1P/1B3P2/PP4P1/5RK1 w - -

Engine: Stockfish 1.6.3s(dc) Build 016 (Athlon 2009 MHz, 128 MB)
by Tord Romstad, Marco Costalba, Joona Kiiski Modifications by Dann Corbit

1.00 0:00 -0.88 27.Bxf7 (206) 1

2.00 0:00 -0.96 27.Bxf7 Kxf7 28.Bd6 (284) 2

3.00 0:00 -1.41 27.Bxf7 Kxf7 28.h5 gxh5 (778) 6

3.00 0:00 -1.01 27.Bd6 a5 28.Bxf7 Kxf7 (1.389) 11

3.00 0:00 -0.64 27.Rfc1 Bxh4 28.Bxe7 Rxe7 29.Rxc8 Rxc8
30.Rxc8 (1.566) 12

4.00 0:00 -0.64 27.Rfc1 Bxh4 28.Bxe7 Rxe7 29.Rxc8 Rxc8
30.Rxc8 (2.019) 16

5.00 0:00 -0.56 27.Rfc1 a5 28.Bxe7 Rxe7 29.Rxc8 Rxc8
30.Rxc8 Bxh4 (3.376) 27

6.00 0:00 -0.36++ 27.Rfc1 a5 28.Bd6 a4 29.Bc4 (4.530) 32

7.00 0:00 -0.20 27.Rfc1 a5 28.Bd6 Ra6 29.Bxe7 Rxe7
30.Rxc8 Bxh4 (7.218) 51

8.00 0:00 -0.08 27.Rfc1 a5 28.Bd6 Ra6 29.Bxe7 Rxe7
30.Rxe7+ Bxe7 31.Rxc8 Rc6 32.Rxc6 bxc6
33.Ba4 Bxh4 34.Bxc6 (18.306) 116

9.00 0:00 0.00 27.Rfc1 a5 28.Bd6 Ra6 29.Bxe7 Rxe7
30.Rxe7+ Bxe7 31.Rc7 Kf6 32.Rxc8 a4
33.Bd5 Rb6 34.b3 axb3 35.axb3 (29.076) 169

10.00 0:00 +0.04 27.Rfc1 a5 28.Bd6 Ra6 29.Bxe7 Rxe7
30.Rxe7+ Bxe7 31.Rc7 Kf6 32.Rxc8 Rc6
33.Rxc6+ bxc6 34.Kf2 Kg7 35.g3 Bc5+
36.Kg2 fxg3 37.Kxg3 (50.696) 249

11.00 0:00 +0.24++ 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 (127.304) 406

12.00 0:00 -0.16 27.Rfc1 a5 28.Bd6 Ra6 29.Bxe7 Rxe7
30.Rxe7+ Bxe7 31.Rc7 Kf6 32.Rxc8 Rc6
33.Rxc6+ bxc6 34.Kf1 Kg7 35.h5 gxh5
36.Ke2 Kf6 (198.720) 488

13.00 0:00 +0.16 27.Rfc1 a5 28.Bc5 b6 29.Bxe7 Rxe7
30.Bd5 Rb8 31.Rxc8 Rxc8 32.Rxc8 Bxh4
33.Rg8+ Kf6 34.Rb8 Kg5 35.Rxb6 Rc7
36.Rd6 (576.317) 646

14.00 0:01 0.00 27.Rfc1 a5 28.Bc5 b6 29.Bxe7 Rxe7
30.Bd5 Rb8 31.Rxc8 Rxc8 32.Rxc8 Bxh4
33.Rg8+ Kf6 34.Rb8 Kg5 35.Rxb6 Rc7
36.Rc6 Rxc6 37.Bxc6 h5 38.Bd5 Bg3 (842.179) 681

15.01 0:02 +0.44 27.Rfc1 a5 28.Ba3 b5 29.Bxf7 b4
30.Bd5 Rb8 31.Bxb4 axb4 32.h5 gxh5
33.R1c6 b3 34.Bxb3 Ra8 35.Rd6 Ba6
36.Bd5 Rc8 37.Rxc8 Bxc8 (1.527.016) 723

16.01 0:03 0.00 27.Rfc1 a5 28.Ba3 b5 29.Bxf7 b4
30.Bd5 Rb8 31.Bxb4 axb4 32.h5 gxh5
33.R1c6 Bg5 34.Rd6 Bf6 35.Rdc6 (2.626.349) 746

17.01 0:08 +0.64 27.Rfc1 a5 28.Ba3 b5 29.Bxf7 b4
30.Bd5 Rb8 31.Bxb4 axb4 32.h5 g5
33.R1c6 g4 34.Rd6 gxf3 35.gxf3 Bg5
36.Kg2 Bf6 37.Rdc6 Bg5 38.Rg6+ Kf8
39.Rd6 Nxd5 40.Rxd5 (6.166.147) 745

17.05 0:12 +1.01 27.Rd1 a5 28.Bd6 Ra6 29.Bxf7 Rxd6
30.Rxd6 Kxf7 31.b3 Bxh4 32.Rd8 Be6
33.Rxb7 Kf6 34.Rc7 Be1 35.Kf1 Bb4
36.Ke2 Kf7 37.Kd3 Kf6 (8.980.991) 735

18.01 0:21 +1.21 27.Rd1 a5 28.Bd6 Nd5 29.Bxd5 Rxc7
30.Bxc7 a4 31.Rc1 Ra6 32.Kf1 b5
33.Ke2 b4 34.Ba5 Rxa5 35.Rc7+ Bd7
36.Rxd7+ Kh8 37.h5 gxh5 38.a3 bxa3
39.bxa3 (15.386.834) 728

19.01 0:31 +1.29 27.Rd1 a5 28.Bd6 Nd5 29.Bxd5 Rxc7
30.Bxc7 a4 31.Rc1 Ra6 32.Kf1 Kf8
33.Bxe5 Bxe5 34.Rxc8+ Ke7 35.Ke2 Bxb2
36.Rc7+ Kd6 37.Rxb7 Bf6 38.h5 gxh5
39.Rh7 Rb6 40.Rxh6 (23.031.753) 733

20.01 0:33 +1.29 27.Rd1 a5 28.Bd6 Nd5 29.Bxd5 Rxc7
30.Bxc7 a4 31.Rc1 Ra6 32.Kf1 Kf8
33.Bxe5 Bxe5 34.Rxc8+ Ke7 35.Ke2 Bxb2
36.Rc7+ Kd6 37.Rxb7 Bf6 38.h5 gxh5
39.Rh7 Rb6 40.Rxh6 (24.702.120) 735

21.01 0:51 +1.17 27.Rd1 a5 28.Bd6 Nd5 29.Bxd5 Rxc7
30.Bxc7 a4 31.Rc1 Ra6 32.Kh2 b5
33.Bxe5 Bxe5 34.Rxc8 Kf6 35.Kh3 h5
36.Rc5 Rb6 37.b3 Bd4 38.Rc8 axb3
39.Rf8+ Ke5 40.Re8+ (37.520.280) 732

22.01 1:04 +1.13 27.Rd1 a5 28.Bd6 Nd5 29.Bxd5 Rxc7
30.Bxc7 a4 31.Rc1 Ra6 32.Kh2 b5
33.Bxe5 Bxe5 34.Rxc8 Kf6 35.Kh3 h5
36.Rc5 Rb6 37.b3 Bd4 38.Rc8 axb3
39.axb3 Ra6 40.g3 (47.628.615) 733

23.01 1:38 +1.09 27.Rd1 a5 28.Bd6 Nd5 29.Bxd5 Rxc7
30.Bxc7 a4 31.Rc1 Ra6 32.Kh2 b5
33.Bxe5 Bxe5 34.Rxc8 Kf6 35.Kh3 h5
36.Rc5 Rb6 37.b3 axb3 38.Bxb3 b4
39.Bd5 Ra6 40.Bc4 (72.402.693) 732

24.01 2:24 +1.09 27.Rd1 a5 28.Bd6 Nd5 29.Bxd5 Rxc7
30.Bxc7 a4 31.Rc1 Ra6 32.Kh2 b5
33.Bxe5 Bxe5 34.Rxc8 Kf6 35.Kh3 h5
36.Rc2 Rb6 37.b3 axb3 38.axb3 Ra6
39.Rc5 b4 40.Bc4 (105.215.943) 726

24.03 3:18 +1.29++ 27.Rfc1 a5 28.Ba3 b5 29.Bc5 Ba6
30.Bxf7 Kxf7 31.h5 gxh5 32.Bxe7 Bxe7
33.R1c6 h4 34.Rxh6 Kg7 35.Re6 (144.022.143) 725

25.01 4:03 +1.49 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 Bd6
33.Kf1 h5 34.Ke2 b6 35.Kd3 Bc5
36.Rc7+ Kf6 37.Rc6+ Kg5 38.Kc4 Bd4
39.Kd5 h4 40.a4 (177.454.083) 728

26.01 4:34 +1.41 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 b6
33.Kf1 Bc5 34.Ke2 h5 35.Rc7+ Kf6
36.Rc6+ Kg7 37.Kd3 Bd4 38.a3 g5
39.a4 Kf7 40.Kc4 (200.762.932) 730

27.01 5:41 +1.45 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 b6
33.Kf1 Bc5 34.Ke2 h5 35.Rc7+ Kf6
36.Rc6+ Kg7 37.Rc8 Bd4 38.Rc7+ Kf6
39.Rc6+ Kf7 40.Kd3 (250.763.360) 733

28.01 7:09 +1.45 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 b6
33.Kf1 Bc5 34.Ke2 h5 35.Rc7+ Kf6
36.Rc6+ Kg7 37.Rc8 Bd4 38.Rc7+ Kf6
39.Rc6+ Kf7 40.Kd3 (314.135.311) 731

29.01 10:40 +1.41 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 b6
33.Kf1 Bc5 34.Ke2 h5 35.Rc7+ Kf6
36.Rc6+ Kg7 37.Rc8 Bd4 38.Rc7+ Kf6
39.Rc6+ Kg7 40.b3 (465.172.782) 725

30.01 15:49 +1.41 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 b6
33.Kf1 Bc5 34.Ke2 h5 35.Rc7+ Kf6
36.Rc6+ Kg7 37.Rc8 Bd4 38.Rc7+ Kf6
39.Rc6+ Kg7 40.b3 (681.736.900) 717

31.01 28:13 +1.61++ 27.Rfc1 Bxh4 28.Bxf7 (1.196.368.902) 706

32.01 50:09 +1.85 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 b6
33.Kf1 Bc5 34.Ke2 Bd4 35.Kd3 Kg7
36.Rc7+ Kf6 37.Rc6+ Kf7 38.Kc4 h5
39.Kd5 a4 40.Kc4 (2.119.739.773) 704

33.01 128:59 +2.06 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 b6
33.Kf1 Bc5 34.Ke2 Bd4 35.Kd3 g5
36.Kc4 Kg6 37.Rc6+ Kh5 38.Kd3 g4
39.fxg4+ Kxg4 40.Rxh6 (5.547.395.765) 716

best move: Rf1-c1 time: 183:09.844 min n/s: 709.261 nodes: 7.794.660.138

This was build 16 the only version so far that was stable. But as of 30 minutes ago, the build 16 is now superseded! I finally got another stable version. Results for Korchnoi- Svidler are coming in a few minutes!

Eelco
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
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User avatar
Eelco de Groot
Posts: 4563
Joined: Sun Mar 12, 2006 2:40 am
Full name:   

Re: Rybka in danger? Re: Korchnoi-Svidler, St. Petersburg 19

Post by Eelco de Groot »

r1b5/ppR1nrk1/5bpp/4p3/1B2Pp1P/1B3P2/PP4P1/5RK1 w - -

Engine: Stockfish 1.6.3s(dc) Build 024 (Athlon 2009 MHz, 128 MB)
by Tord Romstad, Marco Costalba, Joona Kiiski Modifications by Dann Corbit

1.00 0:00 -0.88 27.Bxf7 (206) 1

2.00 0:00 -0.96 27.Bxf7 Kxf7 28.Bd6 (284) 1

3.00 0:00 -1.41 27.Bxf7 Kxf7 28.h5 gxh5 (778) 4

3.00 0:00 -1.01 27.Bd6 a5 28.Bxf7 Kxf7 (1.389) 8

3.00 0:00 -0.64 27.Rfc1 Bxh4 28.Bxe7 Rxe7 29.Rxc8 Rxc8
30.Rxc8 (1.566) 9

4.00 0:00 -0.64 27.Rfc1 Bxh4 28.Bxe7 Rxe7 29.Rxc8 Rxc8
30.Rxc8 (2.019) 11

5.00 0:00 -0.56 27.Rfc1 a5 28.Bxe7 Rxe7 29.Rxc8 Rxc8
30.Rxc8 Bxh4 (3.376) 19

6.00 0:00 -0.36++ 27.Rfc1 a5 28.Bd6 a4 29.Bc4 (4.530) 26

7.00 0:00 -0.20 27.Rfc1 a5 28.Bd6 Ra6 29.Bxe7 Rxe7
30.Rxc8 Bxh4 (7.218) 42

8.00 0:00 -0.08 27.Rfc1 a5 28.Bd6 Ra6 29.Bxe7 Rxe7
30.Rxe7+ Bxe7 31.Rxc8 Rc6 32.Rxc6 bxc6
33.Ba4 Bxh4 34.Bxc6 (18.306) 97

9.00 0:00 0.00 27.Rfc1 a5 28.Bd6 Ra6 29.Bxe7 Rxe7
30.Rxe7+ Bxe7 31.Rc7 Kf6 32.Rxc8 a4
33.Bd5 Rb6 34.b3 axb3 35.axb3 (29.076) 133

10.00 0:00 +0.04 27.Rfc1 a5 28.Bd6 Ra6 29.Bxe7 Rxe7
30.Rxe7+ Bxe7 31.Rc7 Kf6 32.Rxc8 Rc6
33.Rxc6+ bxc6 34.Kf2 Kg7 35.g3 Bc5+
36.Kg2 fxg3 37.Kxg3 (50.696) 202

11.00 0:00 +0.24++ 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 (127.304) 354

12.00 0:00 -0.16 27.Rfc1 a5 28.Bd6 Ra6 29.Bxe7 Rxe7
30.Rxe7+ Bxe7 31.Rc7 Kf6 32.Rxc8 Rc6
33.Rxc6+ bxc6 34.Kf1 Kg7 35.h5 gxh5
36.Ke2 Kf6 (198.939) 439

13.00 0:00 -0.08 27.Rfc1 a5 28.Bd6 Ra6 29.Bxe7 Rxe7
30.Rxe7+ Bxe7 31.Rc7 Kf6 32.Rxc8 Rc6
33.Rxc6+ bxc6 34.Kf1 Kg7 35.h5 gxh5
36.Ba4 c5 37.Be8 h4 38.Ke2 (399.843) 556

14.00 0:01 -0.08 27.Rfc1 a5 28.Bd6 Ra6 29.Bxe7 Rxe7
30.Rxe7+ Bxe7 31.Rc7 Kf6 32.Rxc8 Rc6
33.Rxc6+ bxc6 34.Kf1 Kg7 35.h5 gxh5
36.Ba4 c5 37.Be8 h4 38.Ke2 Kf6
39.Kd3 (844.771) 643

15.01 0:02 -0.08 27.Rfc1 a5 28.Bd6 Ra6 29.Bxe7 Rxe7
30.Rxe7+ Bxe7 31.Rc7 Kf6 32.Rxc8 Rc6
33.Rxc6+ bxc6 34.Kf1 Kg7 35.h5 gxh5
36.Ba4 c5 37.Be8 h4 38.Ke2 Kf6
39.Kd3 (1.714.504) 690

16.01 0:03 -0.08 27.Rfc1 a5 28.Bd6 Ra6 29.Bxe7 Rxe7
30.Rxe7+ Bxe7 31.Rc7 Kf6 32.Rxc8 Rc6
33.Rxc6+ bxc6 34.Kf1 Kg7 35.h5 gxh5
36.Ba4 c5 37.Be8 h4 38.Ke2 Kf6
39.Kd3 (2.619.261) 716

16.02 0:05 0.00 27.h5 a5 28.Ba3 gxh5 29.Rfc1 b5
30.Bxf7 b4 31.Bxb4 axb4 32.Bd5 Rb8
33.R1c6 Bh4 34.Rd6 Bf6 35.Rdc6 (3.652.453) 721

17.01 0:05 0.00 27.h5 a5 28.Ba3 b5 29.Bxf7 Kxf7
30.hxg6+ Ke8 31.Bxe7 Bxe7 32.Rfc1 Be6
33.b3 a4 34.R1c6 Bg8 35.bxa4 Rxa4
36.Rc8+ Kd7 37.R6c7+ Kd6 38.Rc6+ Kd7 (4.314.603) 728

17.02 0:06 +0.20++ 27.Rfc1 a5 28.Ba3 b5 29.Bc5 Ba6
30.Bxf7 Kxf7 31.Bxe7 Bxe7 32.h5 gxh5
33.R1c6 b4 34.Rxh6 Ke8 35.Re6 (4.964.400) 735

18.01 0:07 +1.09++ 27.Rfc1 a5 28.Ba3 b5 29.Bc5 Ba6
30.Bxf7 Kxf7 31.h5 Re8 32.hxg6+ Kxg6
33.Bxe7 Rxe7 34.Rxe7 Bxe7 35.Rc6+ (5.781.921) 734

19.01 0:12 +1.41 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 Bd6
33.Kf1 Kf6 34.Ke2 h5 35.Ra8 b6
36.Rc8 Bc5 37.Rc6+ Kg5 38.Kd3 Bd4
39.b3 h4 40.a4 (8.995.813) 739

20.01 0:15 +1.53 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 Bd6
33.Kf1 Kf6 34.Ke2 h5 35.Kd3 Ke6
36.Ra8 b6 37.Rc8 Bc5 38.Rc6+ Kf7
39.a3 Bd4 40.b4 (11.326.739) 748

21.01 0:19 +1.49 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 Bd6
33.Kf1 b6 34.Ke2 Bc5 35.Rc6 Bd4
36.Kd3 h5 37.Kc4 h4 38.Kd3 Bc5 39.a3 Bd4
40.b3 (14.873.483) 756

22.01 0:30 +1.61 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 Bd6
33.Kf1 b6 34.Ke2 Bc5 35.Rc6 h5
36.Kd3 h4 37.a3 Bd4 38.b3 Be3 39.b4 axb4
40.axb4 (22.740.662) 755

23.01 0:46 +1.65 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 Bd6
33.Kf1 b6 34.Ke2 Bc5 35.Rc6 h5
36.Kd3 h4 37.a3 Bd4 38.b3 Be3 39.Kc4 Bd4
40.Kd5 (35.475.429) 761

24.01 0:55 +1.45-- 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 a4
33.Rc7 b5 34.Rc6 h5 35.Kf1 g5 36.Rh6 h4
37.Rc6 Ke8 38.Re6 (42.915.588) 768

25.01 1:25 +1.45 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 b6
33.Kf2 Bc5+ 34.Ke2 Bd4 35.Kd3 h5
36.Rc7+ Kf6 37.Rc6+ Kg7 38.Ke2 g5
39.b3 g4 40.a3 (65.182.268) 762

26.01 2:27 +1.37 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 b6
33.Kf2 Bc5+ 34.Ke2 Bd4 35.Kd3 h5
36.Rc7+ Kf6 37.Rc6+ Kg7 38.Ke2 g5
39.b3 g4 40.a3 (109.682.219) 743

27.01 5:13 +1.73++ 27.Rfc1 Bxh4 28.Bxf7 Kxf7 29.Bxe7 Bxe7
30.Rxc8 Rxc8 31.Rxc8 Bd6 32.Kf1 Kf6 (226.218.097) 722

28.01 6:31 +1.69 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 b6
33.Kf1 Bc5 34.Ke2 h5 35.Kd3 Bd4
36.Kc4 Kg7 37.Rc7+ Kf6 38.Rc6+ Kg7
39.Kd5 Kf7 40.b3 (288.315.455) 737

29.01 11:15 +1.69 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 b6
33.Kf1 Bc5 34.Ke2 Kf6 35.Rc6+ Kg7
36.Kd3 Bd4 37.Kc4 g5 38.Kd5 a4 39.b4 axb3
40.axb3 (488.210.308) 722

30.01 16:56 +1.97 {Just short of +2. This version has even more singular extensions, a simple idea but the implementation kept crashing. But it seems I found the bug. Not sure about a release or if I could give it another name. I think I would like to if only as an analysis engine, not as an official Stockfish new version. Changes in eval.cpp are untuned but I think I can keep some of it. Well it is also Dann's version, so maybe I will just leave the name as it is and leave it up to Dann if he wants there to be an 1.6.3s(dc) version or better not yet release this.}
27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 b6
33.Kf1 Bc5 34.Ke2 Kf6 35.Rc6+ Kg7
36.Kd3 Bd4 37.Kc4 Kf7 38.Kd5 a4
39.Rc7+ Kf6 40.Rc6+ (724.979.702) 712

31.01 25:25 +1.97 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 b6
33.Kf1 Bc5 34.Ke2 Kf6 35.Rc6+ Kg7
36.Kd3 Bd4 37.Kc4 Kf7 38.Kd5 a4
39.Rc7+ Kf6 40.Rc6+ (1.077.428.943) 706

32.01 35:28 +1.97 27.Rfc1 a5 28.Ba3 Bxh4 29.Bxf7 Kxf7
30.Bxe7 Bxe7 31.Rxc8 Rxc8 32.Rxc8 b6
33.Kf1 Bc5 34.Ke2 Kf6 35.Rc6+ Kg7
36.Kd3 Bd4 37.Kc4 Kf7 38.Kd5 a4
39.Rc7+ Kf6 40.Rc6+ (1.503.979.617) 706

best move: Rf1-c1 time: 39:39.766 min n/s: 703.931 nodes: 1.675.170.255
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
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