Author: scott farrell
Date: 18:43:02 01/04/03
Go up one level in this thread
On January 04, 2003 at 15:20:26, John Merlino wrote:
thanx John.
I think the problem is that the recapture including the knight is bout 25-30
plies deep, and programs dont catch it.
Please read my post below to Robert
Thanx
Scott
>On January 04, 2003 at 14:39:40, scott farrell wrote:
>
>>This position occured in a game chompster vs dorky on ICC (45 10 time control
>>practices for CCT5).
>>
>>[D]r3kb1r/pp1n1pp1/1qp1p2p/3n3P/2NP1B2/3Q2N1/PPP2PP1/R4RK1 b kq - 0 14
>>
>>My engine says NxB is slightly winning for black, it failed high big time at
>>only depth 8 !!!
>>sfarrellc(C) whispers: , D10/11(11): 0.29 : D5F4 , 25.176/48.0 secs
>>
>>Crafty says it is +3 winning for white.
>>Dorky(C) whispers: score=+2.61 depth=13 Knps=111 cpu=99% time=87.05s
>>
>>Here is crafty's annotation:
>>({9:+2.92} 14. ... Nxf4 15. Nxb6 Nxd3 16. Nxa8 Nxb2 17. Rab1 Ba3 18. Nc7+ Kd8
>>19. Na8 +-)
>>({9:+1.04} 14. ... Qd8 15. Bd2 N7b6 16. Ne5 Bd6 17. Rfe1 Qh4 18. Qe4 Qxe4 19.
>>Rxe4 Bxe5 20. Rxe5 +/-)
>>({9:+1.52} 14. ... Qb5 15. Bd6 Nb4 16. Qe2 Nb6 17. Bxf8 Kxf8 18. b3 Nxc4 19.
>>bxc4 Qg5 +-)
>>({9:+1.66} 14. ... Qa6 15. Nd6+ Bxd6 16. Qxa6 bxa6 17. Bxd6 N7f6 18. Rfe1 Rd8
>>19. Bc5 Nf4 +-)
>>({9:+2.03} 14. ... Qb4 15. Bd2 Qa4 16. Ne4 Qa6 17. Ncd6+ Bxd6 18. Nxd6+ Ke7 19.
>>Nc4 Qb5 +-)
>>
>>
>>NxB is a clear winner !!!! It was an easy win from there.
>>
>>How many other engines see this? It took 19 more moves to actually recover the
>>material that my engine could see coming !!!!
>
>Chessmaster 9000, on a P3-733 never considers Nxf4:
>
>Time Depth Score Positions Moves
>0:00 1/4 0.95 6796 14...Qd8 15.Nd6+ Bxd6 16.Bxd6 N7f6
> 17.Qa3
>0:00 1/5 1.28 18474 14...Qd8 15.Nd6+ Bxd6 16.Bxd6 Qh4
> 17.c4 N5f6 18.Rae1 Nxh5
>0:00 1/5 1.17 22222 14...Qb4 15.Bd2 Qe7 16.Rae1 Qh4
>0:00 1/6 1.10 41825 14...Qb4 15.Bd6 Bxd6 16.a3 Ne5
> 17.axb4 Nxd3 18.Nxd6+ Ke7 19.Nxb7
> Nxb2
>0:01 1/6 0.74 62105 14...Qd8 15.Nd6+ Bxd6 16.Bxd6 N7b6
> 17.Bc5 Nf4 18.Qf3
>0:02 1/7 0.77 136567 14...Qd8 15.Nd6+ Bxd6 16.Bxd6 N7b6
> 17.Bc5 Nd7 18.Rae1 Nxc5 19.dxc5
>0:04 1/8 0.64 320475 14...Qd8 15.Nd6+ Bxd6 16.Bxd6 N7b6
> 17.Bc5 Nd7 18.Rfe1 Nxc5 19.dxc5
> O-O 20.Rad1
>0:11 1/9 0.70 976383 14...Qd8 15.Nd6+ Bxd6 16.Bxd6 N7b6
> 17.Bc5 Qh4 18.Rfe1 O-O-O 19.c4 Nf4
>0:26 1/10 0.63 2295574 14...Qd8 15.Nd6+ Bxd6 16.Bxd6 N7b6
> 17.Bc5 Qh4 18.Rfe1 O-O-O 19.Qa3
> Nc4 20.Qxa7 Nxb2
>1:12 2/11 0.74 6479562 14...Qd8 15.Nd6+ Bxd6 16.Bxd6 N7b6
> 17.Bc5 Nd7 18.Ba3 Qh4 19.c4 N5f6
> 20.Bd6 O-O-O
>1:46 2/11 0.65 9650045 14...Qb5 15.Bd6 N5b6 16.Bxf8 Kxf8
> 17.b3 Nf6 18.a4 Qb4 19.Ne5 Nbd5
> 20.Rfd1
>3:03 3/12 0.56 16797261 14...Qb5 15.Bd6 N7b6 16.b3 Rd8
> 17.a4 Qa6 18.Bxf8 Kxf8 19.Rfe1
> Nxc4 20.bxc4
>
>After forcing 14...Nxf4 15.Nxb6 Nxd3 16.Nxa8 Nxb2:
>
>Time Depth Score Positions Moves
>0:00 1/5 0.92 16397 17.a4 Bb4 18.Rfb1 Bc3 19.Ne2
>0:00 1/6 0.87 35538 17.a4 Nc4 18.Rfb1 b6 19.Ne4 Kd8
> 20.Rb3
>0:00 1/7 0.78 73877 17.a4 Nc4 18.Rfb1 b6 19.Nc7+ Kd8
> 20.Na6 Bd6 21.Ne4
>0:01 1/8 0.83 142790 17.a4 Nc4 18.Rfb1 Nd6 19.f3 Be7
> 20.Ne4 Nxe4 21.fxe4
>0:03 1/9 0.69 326827 17.a4 Nc4 18.Rfb1 b6 19.Rb3 Bd6
> 20.Rc3 Bxg3 21.Rxg3 Ke7
>0:09 2/10 0.68 808880 17.a4 Nc4 18.Rfb1 b6 19.Nc7+ Kd8
> 20.Na6 Bd6 21.Ne4 c5 22.c3 Be7
>0:15 2/10 0.75 1369298 17.Rab1 Ba3 18.f4 Ke7 19.Nc7 Nb6
> 20.f5 Bd6 21.fxe6 fxe6 22.Ne4 N2c4
>0:19 3/11 0.75 1781033 17.Rab1 Ba3 18.f4 Ke7 19.Nc7 Nb6
> 20.f5 Bd6 21.fxe6 fxe6 22.Ne4 N2c4
>0:36 4/12 0.45 3461030 17.Rab1 Ba3 18.Rfe1 O-O 19.Re3
> Nc4 20.Rc3 b5 21.Nc7 Nf6 22.Na6
> Nd5 23.Rcb3
>1:06 4/12 0.49 6035396 17.a4 Nc4 18.Rfb1 Na5 19.Ne4 Be7
> 20.Nc7+ Kd8 21.Na8 b6 22.Rd1 Nc4
> 23.Rab1 Nf6 24.Nxf6 Bxf6
>4:14 5/13 0.19 23180659 17.a4 Nc4 18.a5 Bd6 19.Ra4 Nb2
> 20.Ra2 Nc4 21.a6 b6 22.Ne4 Ke7
> 23.Nxd6 Kxd6
>5:37 5/13 0.43 30784831 17.Rab1 Ba3 18.Rfe1 O-O 19.Re3
> Nc4 20.Rxb7 Nxe3 21.fxe3 Nf6 22.Rxa7
> Bd6 23.Ne2 Nd5 24.Kf2
>
>jm
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