Test Position: Exchange or not (Javanbakht-Girish, 2012)

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Vinvin
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Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Test Position: Exchange or not (Javanbakht-Girish, 2012)

Post by Vinvin »

zullil wrote: Latest Stockfish also finds it very quickly:
Let SF run with 3-best-moves mode to see the score difference between d6 and Bxf5
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Eelco de Groot
Posts: 4702
Joined: Sun Mar 12, 2006 2:40 am
Full name:   Eelco de Groot

Re: Test Position: Exchange or not (Javanbakht-Girish, 2012)

Post by Eelco de Groot »

zullil wrote: Latest Stockfish also finds it very quickly:
Stockfish now plays it practically immediately. But it does not seem to be a forced win or something, I see a rook endgame with an extra passer for White. Komodo just does not seem to like it very much, positionally.

r4rk1/p1q1p1bp/1p4p1/n2P1b2/2p1BP2/2P1B3/P3N1PP/2RQ1RK1 w - -

Engine: Rainbow Serpent Sf20150412_019 MOD MP (Q6700, 32 bit, 512 MB)
by Tord Romstad, Marco Costalba and Joona Kiiski

19/31 0:01 +0.98 1.Bxf5 Rxf5 2.g4 Rf7 3.Nd4 Bxd4
4.Qxd4 Qd6 5.f5 gxf5 6.gxf5 Rd8
7.Rcd1 Qf6 8.Qe4 Kf8 9.Bd4 Qd6
10.Be5 Qh6 11.Kh1 Nb7 12.Qg4 Nd6 (2.985.863) 2477

20/34 0:01 +0.93 1.Bxf5 Rxf5 2.g4 Rf7 3.Nd4 Bxd4
4.Qxd4 Qd6 5.f5 Rd8 6.Rcd1 Nb7
7.Qxc4 gxf5 8.Rxf5 Rxf5 9.gxf5 Qf6
10.d6+ Qf7 11.Qg4+ Qg7 12.Qxg7+ Kxg7
13.Bd4+ Kf7 14.dxe7 (4.067.893) 2536

.
.
.

35/57 10:39 +1.09 1.Bxf5 Rxf5 2.g4 Rf7 3.Nd4 Bxd4
4.Qxd4 Nb7 5.f5 Rd8 6.fxg6 Rxf1+
7.Rxf1 hxg6 8.Rf2 Nc5 9.Qxc4 Qe5
10.Bxc5 bxc5 11.Qd3 Qe6 12.c4 Qxg4+
13.Rg2 Qd4+ 14.Qxd4 (1.963.904.909) 3069

best move: Be4xf5 time: 10:46.765 min n/s: 3.069.642 nodes: 1.982.955.738


34 9:47 +1.09 1.Bxf5 Rxf5 2.g4 Rf7 3.Nd4 Bxd4
4.Qxd4 Rd8 5.f5 Qd6 6.Rcd1 Nb7
7.Qxc4 gxf5 8.Rxf5 Rxf5 9.gxf5 Qf6
10.d6+ Qf7 11.Qg4+ Qg7 12.Qxg7+ Kxg7
13.Bd4+ Kf7 14.dxe7 (1.717.717.328) 2925

34 9:47 +0.79 1.d6 Qxd6 2.Qxd6 exd6 3.Bd5+ Kh8
4.Bxa8 Rxa8 5.Bd4 Bd3 6.Rfe1 Nc6
7.Bxg7+ Kxg7 8.Rcd1 Rd8 9.f5 Re8
10.fxg6 hxg6 11.Nf4 Ne5 12.h3 g5
13.Nd5 Rc8 14.Ne3 (1.717.717.328) 2925
________________________________________________

35 15:20 +1.07 1.Bxf5 Rxf5 2.g4 Rf6 3.Bd4 Rd8
4.Bxf6 Bxf6 5.Ng3 Qc5+ 6.Rf2 Nb7
7.Ne4 Qxd5 8.Qxd5+ Rxd5 9.Re2 Kf7
10.Rce1 Bh4 11.Rf1 Bf6 12.Rf3 h5
13.h3 Nc5 14.Nxc5 (2.717.983.198) 2954

35 15:20 +0.73 1.d6 Qxd6 2.Qxd6 exd6 3.Bd5+ Kh8
4.Bxa8 Rxa8 5.Bd4 Bd3 6.Rfe1 Nc6
7.Bxg7+ Kxg7 8.Rcd1 Rd8 9.f5 Re8
10.fxg6 hxg6 11.Nf4 Ne5 12.h3 g5
13.Nd5 Rc8 14.Ne3 (2.717.983.198) 2954
________________________________________________

36 34:36 +1.05 1.Bxf5 Rxf5 2.g4 Rf7 3.Nd4 Bxd4
4.Qxd4 Rd8 5.f5 Nc6 6.Qxc4 Qe5
7.dxc6 Qxe3+ 8.Kh1 Qc5 9.Qxc5 bxc5
10.fxg6 hxg6 11.Rfe1 Rd6 12.c7 Rc6
13.Re6 Rxc7 14.Rxg6+
{[d]6k1/p1r1pr2/6R1/2p5/6P1/2P5/P6P/2R4K b - -} (6.231.078.290) 3001

36 34:36 +0.87 1.d6 Qxd6 2.Qxd6 exd6 3.Bd5+ Kh8
4.Bxa8 Rxa8 5.Bd4 Bd3 6.Bxg7+ Kxg7
7.Rfe1 Nc6 8.Rcd1 Rd8 9.f5 Rb8
10.fxg6 hxg6 11.Nf4 Ne5 12.Rd2 b5
13.Nd5 a5 14.a3 (6.231.078.290) 3001
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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MikeB
Posts: 4889
Joined: Thu Mar 09, 2006 6:34 am
Location: Pen Argyl, Pennsylvania

Re: Test Position: Exchange or not (Javanbakht-Girish, 2012)

Post by MikeB »

Current Unreleased Crafty:

Code: Select all

iMac:crafty michaelbyrne$ ./crafty
choose from 3 best moves.
  ..book random set to 1.
usage:  book [option] [filename] [maxply] [minplay]
EGTB access enabled
using tbpath=/volumes/RAMDisk/egtb
5 piece tablebase files found
14010kb of RAM used for TB indices and decompression tables
Warning--  xboard 'memory' option disabled
hash table memory = 2G bytes (128M entries).
Warning--  xboard 'memory' option disabled
pawn hash table memory = 1G bytes (32M entries).
EGTB cache memory = 512M bytes.
Warning--  xboard 'cores' option disabled
max threads set to 4.

Crafty vXX.x (4 cpus)

White(1): st 999999
search time set to 999999.04.
White(1): setb r4rk1/p1q1p1bp/1p4p1/n2P1b2/2p1BP2/2P1B3/P3N1PP/2RQ1RK1 w - - 0 17
White(1): go
        time surplus   0.00  time limit 16666:39 (16666:39)
        depth     time       score   variation (1)
starting thread 1 2 3 <done>
         19     1.03          0.51   1. d6 Qxd6 2. Qxd6 exd6 3. Bxa8 Rxa8 4.
                                     Nd4 Bd7 5. Rfe1 Re8 6. g3 Nb7 7. Nf3 Nc5
                                     8. Bxc5 dxc5 9. Rxe8+ Bxe8 10. Ne5 Bf7
                                     11. Nxf7 Kxf7
         19->   1.03          0.53   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd7 5. h3 e6 6. Rcd1 exd5 7. Qxd5 Rd8 8.
                                     Qe5 Qxd1 9. Rxd1 Rxd1+ 10. Kg2 Rfd7 (s=2)
         20     1.15          0.69   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd7 5. h3 e6 6. d6 Nc6 7. Qxc4 Na5 8. Qe4
                                     Rd8 9. Rcd1 Nb7 10. f5 exf5 (s=2)
         20->   1.28          0.69   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd7 5. h3 e6 6. d6 Nc6 7. Qxc4 Na5 8. Qe4
                                     Rd8 9. Rcd1 Nb7 10. f5 exf5 (s=2)
         21     1.50          0.75   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd7 5. f5 gxf5 6. Qe5 Qd6 7. Rxf5 Rxf5
                                     8. Qxf5 Rd8 9. Rd1 Rf8 10. Qg5+ Qg6 11.
                                     Rf1 Qxg5 12. Bxg5 Rxf1+ 13. Kxf1 (s=2)
         21->   1.63          0.75   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd7 5. f5 gxf5 6. Qe5 Qd6 7. Rxf5 Rxf5
                                     8. Qxf5 Rd8 9. Rd1 Rf8 10. Qg5+ Qg6 11.
                                     Rf1 Qxg5 12. Bxg5 Rxf1+ 13. Kxf1 (s=2)
         22     2.24          0.87   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. Qe4 b5 6. f5 Rd8 7. Rcd1 a6 8. fxg6
                                     Rxf1+ 9. Rxf1 hxg6 10. Bd4 Rf8 11. Rxf8+
                                     Kxf8 12. Kg2 Kf7 13. Qf3+ Kg8 (s=2)
         22->   2.35          0.87   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. Qe4 b5 6. f5 Rd8 7. Rcd1 a6 8. fxg6
                                     Rxf1+ 9. Rxf1 hxg6 10. Bd4 Rf8 11. Rxf8+
                                     Kxf8 12. Kg2 Kf7 13. Qf3+ Kg8
         23     2.71          0.87   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. Qe4 b5 6. f5 Rd8 7. Rcd1 a6 8. fxg6
                                     Rxf1+ 9. Rxf1 hxg6 10. Bd4 Rf8 11. Rxf8+
                                     Kxf8 12. Kg2 Kf7 13. Qf3+ Kg8
         23->   2.77          0.87   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. Qe4 b5 6. f5 Rd8 7. Rcd1 a6 8. fxg6
                                     Rxf1+ 9. Rxf1 hxg6 10. Bd4 Rf8 11. Rxf8+
                                     Kxf8 12. Kg2 Kf7 13. Qf3+ Kg8
         24     3.44          0.86   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. Qe4 b5 6. f5 Nb7 7. fxg6 Qxg6 8.
                                     Qxg6+ hxg6 9. Rxf7 Kxf7 10. Rf1+ Kg8 11.
                                     Re1 Kf7 12. Bg5 Re8 13. Rf1+ Kg7 14. Kg2
         24->   3.65          0.86   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. Qe4 b5 6. f5 Nb7 7. fxg6 Qxg6 8.
                                     Qxg6+ hxg6 9. Rxf7 Kxf7 10. Rf1+ Kg8 11.
                                     Re1 Kf7 12. Bg5 Re8 13. Rf1+ Kg7 14. Kg2
         25     4.80          0.75   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. Qe4 b5 6. f5 Nb7 7. fxg6 Qxg6 8.
                                     Qxg6+ hxg6 9. Rxf7 Kxf7 10. Rb1 Nd6 11.
                                     Bd4 Ke8 12. Kg2 Kd7 13. Rf1 Ne4
         25->   5.61          0.75   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. Qe4 b5 6. f5 Nb7 7. fxg6 Qxg6 8.
                                     Qxg6+ hxg6 9. Rxf7 Kxf7 10. Rb1 Nd6 11.
                                     Bd4 Ke8 12. Kg2 Kd7 13. Rf1 Ne4
         26     7.59          0.82   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. Qe4 b5 6. f5 Nb7 7. fxg6 Qxg6 8.
                                     Qxg6+ hxg6 9. Rxf7 Kxf7 10. Rf1+ Ke8 11.
                                     h4 Rd8 12. Rd1 Nd6 13. h5 Ne4 14. hxg6
                                     Nxc3
         26->   8.12          0.82   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. Qe4 b5 6. f5 Nb7 7. fxg6 Qxg6 8.
                                     Qxg6+ hxg6 9. Rxf7 Kxf7 10. Rf1+ Ke8 11.
                                     h4 Rd8 12. Rd1 Nd6 13. h5 Ne4 14. hxg6
                                     Nxc3
         27    13.69          0.83   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. Qe4 b5 6. f5 Nb7 7. Kh1 Rd8 8. Rcd1
                                     a5 9. Qd4 a4 10. Qe4 Rd7 11. Qb1 Qa6 12.
                                     Kg2 gxf5 13. Rxf5 Nd6 14. Rxf7 Nxf7
         27->  14.35          0.83   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. Qe4 b5 6. f5 Nb7 7. Kh1 Rd8 8. Rcd1
                                     a5 9. Qd4 a4 10. Qe4 Rd7 11. Qb1 Qa6 12.
                                     Kg2 gxf5 13. Rxf5 Nd6 14. Rxf7 Nxf7
         28    20.47          0.98   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. f5 Rd8 6. Rcd1 gxf5 7. Rxf5 Rxf5
                                     8. gxf5 Qf6 9. Qe4 Kf8 10. Re1 Rd7 11.
                                     Bd4 Qf7 12. Qe5 Nb7 13. Re2 Qxd5 14. Qg7+
                                     Ke8 15. Qh8+ Kf7 16. Qxh7+ Ke8
         28->  22.46          0.98   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. f5 Rd8 6. Rcd1 gxf5 7. Rxf5 Rxf5
                                     8. gxf5 Qf6 9. Qe4 Kf8 10. Re1 Rd7 11.
                                     Bd4 Qf7 12. Qe5 Nb7 13. Re2 Qxd5 14. Qg7+
                                     Ke8 15. Qh8+ Kf7 16. Qxh7+ Ke8
         29    28.26          0.97   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. f5 Rd8 6. Rcd1 gxf5 7. Rxf5 Rxf5
                                     8. gxf5 Qf6 9. Qe4 Kf8 10. Re1 Rd7 11.
                                     Bd4 Qf7 12. Qe5 Nb7 13. Re2 Nd6 14. Kh1
                                     Qf6 15. Qe6 Qxe6 16. fxe6
         29->  31.06          0.97   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. f5 Rd8 6. Rcd1 gxf5 7. Rxf5 Rxf5
                                     8. gxf5 Qf6 9. Qe4 Kf8 10. Re1 Rd7 11.
                                     Bd4 Qf7 12. Qe5 Nb7 13. Re2 Nd6 14. Kh1
                                     Qf6 15. Qe6 Qxe6 16. fxe6
         30    44.20          1.02   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. f5 Rd8 6. Rcd1 gxf5 7. Rxf5 Rxf5
                                     8. gxf5 Qf6 9. Qe4 Kf8 10. Re1 Rd7 11.
                                     Bd4 Qf7 12. Qe5 Nb7 13. Re2 Ke8 14. Qh8+
                                     Qf8 15. Qxh7 Rxd5 16. Qg6+ Kd8
         30->  46.62          1.02   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. f5 Rd8 6. Rcd1 gxf5 7. Rxf5 Rxf5
                                     8. gxf5 Qf6 9. Qe4 Kf8 10. Re1 Rd7 11.
                                     Bd4 Qf7 12. Qe5 Nb7 13. Re2 Ke8 14. Qh8+
                                     Qf8 15. Qxh7 Rxd5 16. Qg6+ Kd8
         31     1:25          1.14   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. f5 Rd8 6. Rcd1 gxf5 7. Rxf5 Rxf5
                                     8. gxf5 Qf6 9. Qe4 Kf8 10. Re1 Qf7 11.
                                     Bh6+ Ke8 12. Bg5 Rxd5 13. Qxe7+ Qxe7 14.
                                     Rxe7+ Kf8 15. Rxh7 Rxf5 16. Bh6+ Ke8 17.
                                     Rxa7 Nc6 18. Rg7
         31->   1:28          1.14   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Bxd4 4. Qxd4
                                     Qd6 5. f5 Rd8 6. Rcd1 gxf5 7. Rxf5 Rxf5
                                     8. gxf5 Qf6 9. Qe4 Kf8 10. Re1 Qf7 11.
                                     Bh6+ Ke8 12. Bg5 Rxd5 13. Qxe7+ Qxe7 14.
                                     Rxe7+ Kf8 15. Rxh7 Rxf5 16. Bh6+ Ke8 17.
                                     Rxa7 Nc6 18. Rg7
         32     2:10          1.27   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Qc5 4. Qf3
                                     Bxd4 5. Bxd4 Qd6 6. Rce1 Rd8 7. Re5 Nb7
                                     8. Qe3 Nc5 9. Bxc5 Qxc5 10. Qxc5 bxc5 11.
                                     Kg2 Rf6 12. Kf3 Ra6 13. Rf2 Ra3 14. Rc2
                                     Kf7 15. f5 Rb8 16. Kf4 Ra6
         32->   2:12          1.27   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Qc5 4. Qf3
                                     Bxd4 5. Bxd4 Qd6 6. Rce1 Rd8 7. Re5 Nb7
                                     8. Qe3 Nc5 9. Bxc5 Qxc5 10. Qxc5 bxc5 11.
                                     Kg2 Rf6 12. Kf3 Ra6 13. Rf2 Ra3 14. Rc2
                                     Kf7 15. f5 Rb8 16. Kf4 Ra6
?         33     3:16          1.16   1. Bxf5 Rxf5 2. g4 Rf7 3. Nd4 Qc5 4. Qf3
                                     Bxd4 5. Bxd4 Qd6 6. Rce1 Rd8 7. Re5 Nb7
                                     8. Qe3 Nc5 9. Bxc5 Qxc5 10. Qxc5 bxc5 11.
                                     Kg2 Rf6 12. Kf3 Rd7 13. Rfe1 Rfd6 14. Ke4
                                     Kf7 15. f5 Rb6 16. fxg6+ Kxg6 17. Rf1 Rb2
                                     18. Re6+ Kg5
         33     3:16          5/34*  1. ... Bf3     (26.5Mnps)             
        time=3:16(99%)  nodes=5224808392(5.2B)  fh1=88%  pred=0  nps=26.5M
        checks=137.9M  qchecks=231.6M  fp=1.8B  mcp=262.8M  reversible=0
        LMReductions:  1/130.8M  2/86.4M  3/40.2M  4/2.9M  5/34.6K  6/20
        null-move (R):  3/177.5M  4/17.4M  5/724.7K  6/49.8K  7/2.1K  8/16
        splits=58.4K  aborts=10.9K  joins=107.0K  data=18%  tbhits=0
White(1): Bxf5
              time used:   3:16
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User avatar
Eelco de Groot
Posts: 4702
Joined: Sun Mar 12, 2006 2:40 am
Full name:   Eelco de Groot

Re: Test Position: Exchange or not (Javanbakht-Girish, 2012)

Post by Eelco de Groot »

Trying to get a bit clearer picture, there was a small rise for the eval of Bxf5. But I had to stop at depth 43.


37 41:30 +1.04 1.Bxf5 Rxf5 2.g4 Rf7 3.Nd4 Bxd4
4.Qxd4 Rd8 5.Rcd1 Nb7 6.f5 Nd6
7.Qe5 Ne8 8.Qe6 Qc8 9.fxg6 Qxe6
10.gxh7+ Kxh7 11.dxe6 Rxf1+ 12.Rxf1 Nf6
13.Bd4 Kg6 14.h3 (7.413.360.499) 2976

37 41:30 +0.83 1.d6 Qxd6 2.Qxd6 exd6 3.Bd5+ Kh8
4.Bxa8 Rxa8 5.Bd4 Bd3 6.Bxg7+ Kxg7
7.Rfe1 Nc6 8.Rcd1 Rd8 9.f5 Re8
10.Nf4 Ne5 11.Re3 Rb8 12.fxg6 hxg6
13.Rd2 b5 14.Nd5 (7.413.360.499) 2976
_____________________________________________________________

38 58:27 +1.14 1.Bxf5 Rxf5 2.g4 Rf7 3.Nd4 Bxd4
4.Qxd4 Qd6 5.f5 Rd8 6.Rcd1 Qf6 7.Qe4 Nb7
8.Bd4 Nc5 9.Qe2 Qd6 10.Be5 Qd7
11.Qxc4 Qa4 12.Qxa4 Nxa4 13.fxg6 hxg6
14.c4 (9.804.855.047) 2795

38 58:27 +0.86 1.d6 Qxd6 2.Qxd6 exd6 3.Bd5+ Kh8
4.Bxa8 Rxa8 5.Bd4 Nc6 6.Bxg7+ Kxg7
7.Rfe1 Bd3 8.Rcd1 Rd8 9.f5 Re8
10.Nf4 Ne5 11.Re3 Kf7 12.Rh3 Kg8
13.fxg6 hxg6 14.Nd5 (9.804.855.047) 2795
_____________________________________________________________

39 93:05 +1.25 1.Bxf5 Rxf5 2.g4 Rf7 3.Nd4 Qc5 4.Qf3 Bxd4
5.Bxd4 Qd6 6.Be5 Qc5+ 7.Kh1 Rd8
8.Rcd1 Nb7 9.f5 Nd6 10.Qh3 g5
11.Rfe1 Qf2 12.Bd4 Qh4 13.Qxh4 gxh4
14.Kg2 (16.073.674.152) 2877

39 93:05 +0.82 1.d6 Qxd6 2.Qxd6 exd6 3.Bd5+ Kh8
4.Bxa8 Rxa8 5.Bd4 Nc6 6.Bxg7+ Kxg7
7.Rcd1 Bd3 8.Rfe1 Rd8 9.f5 g5 10.Ng3 Ne5
11.Ne4 Nf7 12.h3 Re8 13.Nf2 Ne5
14.Re3 (16.073.674.152) 2877
_____________________________________________________________

40 213:35 +1.32 1.Bxf5 Rxf5 2.g4 Rf7 3.Nd4 Bxd4 4.Qxd4 Qd6
5.f5 Nb7 6.fxg6 Rxf1+ 7.Rxf1 hxg6
8.Qxc4 Rd8 9.Qe4 Nc5 10.Qc2 Rf8
11.c4 Rxf1+ 12.Kxf1 Kf7 13.Qf2+ Ke8
14.Qb2 (38.172.797.677) 2978

40 213:35 +0.84 1.d6 Qxd6 2.Qxd6 exd6 3.Bd5+ Kh8 4.Bxa8 Rxa8
5.Bd4 Nc6 6.Bxg7+ Kxg7 7.Rcd1 Bd3
8.Rfe1 Rd8 9.f5 Rb8 10.fxg6 hxg6
11.Nf4 Ne5 12.Rd2 Kf6 13.Rf2 Ke7
14.a4 (38.172.797.677) 2978
_____________________________________________________________

41 278:44 +1.29 1.Bxf5 Rxf5 2.g4 Rf7 3.Nd4 Bxd4
4.Qxd4 Rd8 5.Rcd1 e6 6.d6 Qd7
7.Rfe1 Re8 8.h3 Nc6 9.Qxc4 Na5
10.Qd4 Qc6 11.Bf2 Nc4 12.d7 Rd8
13.Qe4 Qxe4 14.Rxe4 (50.483.510.587) 3018

41 278:44 +0.87 1.d6 Qxd6 2.Qxd6 exd6 3.Bd5+ Kh8
4.Bxa8 Rxa8 5.Bd4 Bd3 6.Rfe1 Nc6
7.Bxg7+ Kxg7 8.Rcd1 Rd8 9.f5 Rb8
10.fxg6 hxg6 11.Nf4 Ne5 12.Rd2 b5
13.Rb2 a5 14.a3 (50.483.510.587) 3018
_____________________________________________________________

42 421:22 +1.20 1.Bxf5 Rxf5 2.g4 Rf6 3.Bd4 Rd6
4.Bxg7 Kxg7 5.f5 Qc5+ 6.Qd4+ Qxd4+
7.Nxd4 Nb7 8.Rce1 Rd7 9.Ne6+ Kg8
10.fxg6 hxg6 11.Rf4 Nc5 12.Rxc4 Nxe6
13.Rxe6 Rxd5 14.Rxe7 (78.114.572.905) 3089

42 421:22 +0.68 1.d6 Qxd6 2.Bd5+ Kh8 3.Bxa8 Rxa8
4.Qxd6 exd6 5.Bd4 Nc6 6.Bxg7+ Kxg7
7.Rfe1 Bd3 8.Rcd1 Rd8 9.g4 Rf8
10.Kg2 d5 11.f5 Re8 12.Ng3 Re5
13.fxg6 hxg6 14.Rxe5 (78.114.572.905) 3089
_____________________________________________________________

43 667:32 +1.38 1.Bxf5 Rxf5 2.g4 Rf7 3.Nd4 Bxd4
4.Qxd4 Nb7 5.f5 Rd8 6.Rcd1 Nd6 7.Qe5 Ne8
8.Qe6 Qd7 9.fxg6 Qxe6 10.gxh7+ Kxh7
11.dxe6 Rxf1+ 12.Rxf1 Nf6 13.Bd4 Kg6
14.h3
{[d]3r4/p3p3/1p2Pnk1/8/2pB2P1/2P4P/P7/5RK1 b - -
This would be a lost position for Black.
-2.03 1...Nd5 2.Be5 Rc8 3.h4 Rc6 4.Rf5 Rxe6
5.Kf2 Kh7 6.h5 Nf6 7.Kg3 Ne4+ 8.Kf4 Nf6
9.Bd4 Re4+ 10.Kf3 Re1 11.Kg3 Re6
12.a4 Ne4+ 13.Kf4 Nf6 14.a5 bxa5}(125.093.118.401) 3123

43 667:32 +0.92 1.d6 Qxd6 2.Qxd6 exd6 3.Bd5+ Kh8
4.Bxa8 Rxa8 5.Bd4 Nc6 6.Bxg7+ Kxg7
7.Rcd1 Bd3 8.Rfe1 Rd8 9.f5 Rb8
10.fxg6 hxg6 11.Nf4 Ne5 12.a4 Kf6
13.Rd2 Rc8 14.Rf2 (125.093.118.401) 3123
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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