Author: Dann Corbit
Date: 23:20:16 01/16/03
Go up one level in this thread
On January 17, 2003 at 01:54:10, Dann Corbit wrote:
>On January 16, 2003 at 23:47:33, Eric Tom wrote:
>
>>Hi!
>>
>>In the following position, NCO proclaims that this is a draw. Can any chess
>>engines prove otherwise? I'm just curious if there's anyway at all Black can
>>win. NCO's continuation is as follows 20 Ng4 bxc3 21 Rh3 f5 22 Nf6 h6 23 Qxh6+
>>Bxh6 24 Rxh6+ Kg7 25 Rh7+ Kf8 followed by perpetual checking. Sorry, I do not
>>know how to post the board in this message.
>
>From here:
>[D]r1r2b1k/1bq2p1p/p1npp1pN/2nB2P1/1p2P2Q/2N1B1R1/PPP2P1P/2KR4 w - - ce -160;
>acd 13; acs 180; pv Bxc5 dxc5 Bxc6 Bxc6 Ne2 Bb5 Rd2 c4 Rf3 Be8 Qf4 c3 bxc3 Qxf4
>Nxf4 bxc3;|Be3c5
>{Bxc5 chosen instead of Ng4}
>
>[D]r1r2b1k/1bq2p1p/p1npp1p1/2nB2P1/1p2P1NQ/2N1B1R1/PPP2P1P/2KR4 b - - ce 494;
>acd 12; acs 180; pv bxc3 Nf6 h5 Bxc5 dxc5 Bxe6 Qb6 Bb3 c4 Nd7 cxb2+ Kxb2 Bg7+
>Kb1 Qb4;|bc3
>{bxc3 chosen and played}
>
>[D]r1r2b1k/1bq2p1p/p1npp1p1/2nB2P1/4P1NQ/2p1B1R1/PPP2P1P/2KR4 w - - ce -448; acd
>11; acs 180; pv Nf6 h5 Bxc5 dxc5 Bxe6 Qb6 Rxc3 fxe6 Rd7 Rc7 Nxh5 Bh6 Rxc7 Qxc7
>gxh6 gxh5 Qxh5;|Ng4f6
>{Nf6 chosen instead of Rh3}
>
>[D]r1r2b1k/1bq2p1p/p1npp1p1/2nB2P1/4P1NQ/2p1B2R/PPP2P1P/2KR4 b - - ce 510; acd
>12; acs 180; pv h5 Bxc5 dxc5 Nf6 cxb2+ Kb1 Bg7 Bxe6 Bxf6 Bxc8 Bxc8 gxf6 Bxh3
>Qxh3 Rb8;|h5
>{h5 chosen (HUGE advantage) instead of f5. Is f5 a collosal blunder?}
h5 holds a full piece advantage. f5 is Ruffian's *5th* choice.
E:\programme\winboard\ruffian>ruffian -h 300M -T e:\dead.epd -t 999 -p 99
Hash size 314572800
Ruffian 1.0.1
feature done=0
Loading configuration: ruffian.cfg
Warning: EGTB_HASH_SIZE changed, default=1048576, newvalue=8388608
Logfile: Thu Jan 16 23:02:59 2003
Total hash size 300M
Initializing tablebases: /programme/winboard/nalimov
Testing e:\dead.epd, 999 seconds, extra ply 99
Testing: test 1 Solution: cxb2+
r1r2b1k/1bq2p1p/p1npp1p1/2nB2P1/4P1NQ/2p1B2R/PPP2P1P/2KR4 b - -
Depth Time Score Best line
7/21 1.64 4.61 ... cxb2+ Kxb2 h5 gxh6 Be7 Qg3 Na4+ Kb3 exd5 exd5
Nb4 Kxa4
7--> 1.95 4.61 ... cxb2+ Kxb2 h5 gxh6 Be7 Qg3 Na4+ Kb3 exd5 exd5
Nb4 Kxa4
8/24 3.78 4.62 ... cxb2+ Kxb2 h5 gxh6 Be7 Bg5 exd5 Bf6+ Kh7 exd5
Qb6+ Ka1 Bxf6+ Qxf6
8--> 4.92 4.62 ... cxb2+ Kxb2 h5 gxh6 Be7 Bg5 exd5 Bf6+ Kh7 exd5
Qb6+ Ka1 Bxf6+ Qxf6
9/31 11.40 4.52 ... cxb2+ Kxb2 h5 gxh6 exd5 Bxc5 Be7 Qg3 dxe4 Bxd6
Qd7
9--> 14.45 4.52 ... cxb2+ Kxb2 h5 gxh6 exd5 Bxc5 Be7 Qg3 dxe4 Bxd6
Qd7
10/31 23.48 ++ ... cxb2+
10/33 1:16 -- ... cxb2+
10/33 1:26 3.17 ... cxb2+ Kb1 h5 Bxc5 dxc5 Nf6 Bg7 Nxh5 gxh5 Qxh5+
Kg8 Qh7+ Kf8 Bxe6 Rd8 Bd5
10/33 1:46 x.xx ... h5
10/33 1:55 3.64 ... h5 Bxc5 dxc5 Nf6 Qb6 bxc3 Qa5 Nxh5 Qa3+ Kb1 exd5
Nf6+ Kg7 exd5
10--> 2:01 3.64 ... h5 Bxc5 dxc5 Nf6 Qb6 bxc3 Qa5 Nxh5 Qa3+ Kb1 exd5
Nf6+ Kg7 exd5
11/33 3:02 3.66 ... h5 Nf6 Bg7 Kb1 Ne5 Bxc5 exd5 Bxd6 Qb6 Ba3 cxb2
exd5
11--> 4:03 3.66 ... h5 Nf6 Bg7 Kb1 Ne5 Bxc5 exd5 Bxd6 Qb6 Ba3 cxb2
exd5
12/35 5:30 3.50 ... h5 Nf6 Bg7 Bxc5 dxc5 Nxh5 gxh5 Bxe6 cxb2+ Kb1
Rd8 Qxh5+ Kg8 Qh7+ Kf8
12--> 8:34 3.50 ... h5 Nf6 Bg7 Bxc5 dxc5 Nxh5 gxh5 Bxe6 cxb2+ Kb1
Rd8 Qxh5+ Kg8 Qh7+ Kf8
13/38 11:59 3.37 ... h5 Nf6 Bg7 bxc3 Qa5 Qxh5+ gxh5 Rxh5+ Bh6 Rxh6+
Kg7 Rh7+ Kf8 g6 Ne5 Bxc5 dxc5 g7+ Ke7 Bxb7 Qa3+ Kb1
Kxf6 Bxa8 Rxa8
13... 14:52 5/37 f5
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