Author: Dann Corbit
Date: 00:33:06 12/08/01
Go up one level in this thread
On December 08, 2001 at 02:46:14, Uri Blass wrote: >On December 07, 2001 at 21:03:20, Dann Corbit wrote: > >>On December 07, 2001 at 12:48:22, ALI MIRAFZALI wrote: >> >>>The following position occured in one of the oldest Correspondence games >>>played in America: >>>[D] 2kr3r/ppp2ppp/1b3nq1/4p2b/1PB1P3/2P1B3/P1QN1PPP/R4RK1 b - 0 1 >>>This game was played in 1840. >>>Here black played 15...Rxd2!! Game finished with 16.Qxd2 Nxe4 17.Qc1 Bf3 >>>18.g3 h5! 19.Bd5 h4 20.Bxe4 Qxe4 21.Bxb6 Qg4 22.Qe3 axb6 23.R(f)-b1 e4 >>>24.Qe1 f5! 25.Rb2 f4 26.R(a)-b1 Black announced Mate in Some number of moves. >>>Fritz 6 and chessmaster 8000 donot see 15...Rxd2!! No matter how long one runs >>>the position. >>>Does your program see 15...Rxd2!!!.Althuogh Tactics is the area that Computers >>>are naturally strong ;it is interesting that one still runs into tactical >>>positions which programs cannot solve.Please indicate your result. >> >>Quite an interesting position... >>[D] 2kr3r/ppp2ppp/1b3nq1/4p2b/1PB1P3/2P1B3/P1QN1PPP/R4RK1 b - - >> >>It appears that Quark is the only engine to carefully consider Rxd2: >>position 1 >> 5 102 5 16684 b6e3 f2e3 g6g5 a1e1 c7c6 >> 5 102 6 21481 b6e3 f2e3 g6g5 a1e1 c7c6 >> 6 78 10 37153 b6e3 f2e3 g6h6 f1e1 f6g4 d2f1 >> 6 78 14 51152 b6e3 f2e3 g6h6 f1e1 f6g4 d2f1 >> 7 96 20 78321 b6e3 f2e3 g6h6 f1e1 f6g4 d2f1 h6f6 >> 7 96 32 132732 b6e3 f2e3 g6h6 f1e1 f6g4 d2f1 h6f6 >> 8 84 61 250523 b6e3 f2e3 g6h6 f1e1 f6g4 d2f1 h6c6 c4d5 >> 8 84 88 385576 b6e3 f2e3 g6h6 f1e1 f6g4 d2f1 h6c6 c4d5 >> 9 81 424 1576731 b6e3 f2e3 g6h6 f1e1 f6g4 d2f1 h6g5 a2a4 g5h4 >> 9 81 597 2364464 b6e3 f2e3 g6h6 f1e1 f6g4 d2f1 h6g5 a2a4 g5h4 >>10 93 1252 4874575 b6e3 f2e3 g6g5 f1e1 d8d6 a2a4 h8d8 d2f1 d6c6 c4d3 >>10 93 1411 5598432 b6e3 f2e3 g6g5 f1e1 d8d6 a2a4 h8d8 d2f1 d6c6 c4d3 >>11 111 2236 8933072 b6e3 f2e3 g6g5 f1e1 d8d6 c4f1 f6g4 d2c4 d6f6 c2a4 >>a7a6 >>11 111 2744 11187292 b6e3 f2e3 g6g5 f1e1 d8d6 c4f1 f6g4 d2c4 d6f6 c2a4 >>a7a6 >>12 109 5143 21088556 b6e3 f2e3 d8d7 f1f2 h8d8 h2h3 g6g3 d2f1 g3h4 g2g4 >>h5g6 c4b5 >>12 109 6579 27904369 b6e3 f2e3 d8d7 f1f2 h8d8 h2h3 g6g3 d2f1 g3h4 g2g4 >>h5g6 c4b5 >>13 118 10994 46376265 b6e3 f2e3 d8d7 h2h3 g6g5 a1e1 g5g3 g1h1 h8d8 d2b3 >>c7c6 a2a4 h7h6 >>13 119 15729 70062407 d8d2! >>13 122 16497 73654902 d8d2 c2d2 f6e4 d2d3 h8d8 d3b1 b6e3 f2e3 d8d2 g2g3 >>e4c3 b1g6 f7g6 >>13 122 18540 83286233 d8d2 c2d2 f6e4 d2d3 h8d8 d3b1 b6e3 f2e3 d8d2 g2g3 >>e4c3 b1g6 f7g6 >>14 108 25489 118020562 d8d2 c2d2 f6e4 d2d3 h8d8 d3b1 e4c3 b1g6 h5g6 e3b6 >>a7b6 a1c1 c3d5 f1e1 >> >>Although Quark eventually switches back to Bxe3 >> >> >>Beowulf: >>Current Position = -0.50 >>Number of Possible Moves = 40 >> >> 6 73 69 59143 b6e3 f2e3 g6g5 g2g4 g5e3 g1h1 >> 7 88 143 112576 b6e3 f2e3 g6h6 a1e1 f6g4 d2f3 g4e3 >> 8 88 321 301998 b6e3 f2e3 g6h6 f1e1 h6g5 a2a4 c8b8 g2g3 >> 9 101 631 702259 b6e3 f2e3 g6g5 f1e1 c8b8 a2a4 d8d7 a1d1 >> 10 92 2057 2614250 b6e3 f2e3 g6g5 f1e1 d8d7 g1h1 h8d8 d2f3 h5f3 >>g2f3 >> 11 121! 4382 6327992 b6e3 f2e3 g6g5 f1e1 d8d7 g1h1 h8d8 a1d1 >> 11 121 4778 6862582 b6e3 f2e3 g6g5 f1e1 d8d7 g1h1 h5g6 d2f3 d7d1 >>a1d1 f6e4 >> 12 131 24383 31707509 b6e3 f2e3 g6g5 f1e1 d8d7 g1h1 h8d8 d2f3 h5f3 >>g2f3 d7d2 c2a4 >> 12 131 99900 114152522 b6e3 f2e3 g6g5 f1e1 d8d7 g1h1 h8d8 d2f3 h5f3 >>g2f3 d7d2 c2a4 >> >>Search Time : 999.0 Seconds >>Total Nodes Searched : 114152522 (89.5% Qui) >>Total Nodes Evaluated : 102160016 >>Cuts : Delta 22748279 : SEE 22807388 : Mate 0 >> : Razor 7443478 : Eval 55013059 >>Extensions : Check 2313832 : OneRep 83541 : CMThreat 26069 >> : Pawn 2344 : Recap 321588 : RevCheck 68378 >>Hash Stores (Size) : 7870372 (5592373) >>Hash Probes (Hits) : 62166883 (6031179) >>EGTB Probes (Hits) : 0 (0) >>Move Ordering : 69.4% >>Best Move = b6e3 >>[1]B > >> >>Phalanx: >> -> easy move (1) Bb6xe3 >> 5 -> 0:00.74 98470 0 turns >> 6 106 100 140314 Bb6xe3 Pf2xe3 Qg6-g5 Rf1-e1 Nf6-g4 Nd2-f1 >> Rh8-e8 >> 6 -> 0:01.47 215458 0 turns >> 7 79 703 397895 Bb6xe3 Pf2xe3 Nf6-g4 Rf1-e1 >> 7 -> 0:21.08 889754 0 turns >> 8 99 2551 1628993 Bb6xe3 Pf2xe3 Qg6-g5 Rf1-e1 Rh8-e8 Bc4-b5 >> Re8-e6 Nd2-f1 Kc8-b8 >> 8 -> 0:31.70 2689478 0 turns >> 9 84 4098 4424999 Bb6xe3 Pf2xe3 Qg6-g5 Rf1-e1 Rd8-d6 Bc4-b5 >> Pa7-a6 Bb5-c4 Nf6-g4 Nd2-f1 >> 9 -> 1:01.44 8361639 0 turns >> 10 101 10838 16723310 Bb6xe3 Pf2xe3 Qg6-g5 Rf1-e1 Rd8-d6 Bc4-b5 >> Pa7-a6 Bb5-c4 Nf6-g4 Nd2-f1 Rh8-d8 >> 10 -> 2:32.27 24687615 0 turns >> 11 101 25825 44607004 Bb6xe3 Pf2xe3 Rd8-d7 Nd2-f3 >> 11 -> 6:18.19 66805774 0 turns >> >>Chess Tiger 14: >>2kr3r/ppp2ppp/1b3nq1/4p2b/1PB1P3/2P1B3/P1QN1PPP/R4RK1 b - - ce 92; acd 15; acs >>999; pv Bxe3 fxe3 Rhe8 Rae1 Re7 Be2 Bxe2 Rxe2 Red7 Nc4 Qxe4 Qxe4 Nxe4 Nxe5 Rd1 >>Nxf7 Nxc3; >> >>Gambit Tiger II: >>2kr3r/ppp2ppp/1b3nq1/4p2b/1PB1P3/2P1B3/P1QN1PPP/R4RK1 b - - ce 114; acd 14; acs >>999; pv Bxe3 fxe3 Rd7 Nf3 Re8 Qa4 a6 Bb5 c6 Bxc6 bxc6 Qxc6+ Kb8 Qb6+ Rb7 Qd6+ >>Ka7 Qc5+; >> >>Little Goliath 3: >>2kr3r/ppp2ppp/1b3nq1/4p2b/1PB1P3/2P1B3/P1QN1PPP/R4RK1 b - - ce 124; acd 13; acs >>999; pv Bxe3 fxe3 Rd7 Nf3 Bxf3 Rxf3 Qxe4 Qxe4 Nxe4 Rxf7 Rxf7 Bxf7 Nxc3 Be6+ Kd8 >>Bc4 Ke7; >> >>Crafty: >>2kr3r/ppp2ppp/1b3nq1/4p2b/1PB1P3/2P1B3/P1QN1PPP/R4RK1 b - - ce 117; acd 15; acs >>999; pv Bxe3 fxe3 Rd6 Bb3 Be2 Nc4 Bxc4 Bxc4 Nxe4 Bxf7 Qg4 c4 Rd2 Be6+ Qxe6 Qxe4 >>Kb8 a4; >> >>ExChess: >>2kr3r/ppp2ppp/1b3nq1/4p2b/1PB1P3/2P1B3/P1QN1PPP/R4RK1 b - - ce 134; acd 14; acs >>999; pv Bxe3 fxe3 Rd7 Nf3 Bxf3 Rxf3 Qxe4 Qxe4 Nxe4 Rxf7 Rxf7 Bxf7 Nxc3 Be6+ Kb8 >>Rf1 Rd8; >> >>Pepito: >>2kr3r/ppp2ppp/1b3nq1/4p2b/1PB1P3/2P1B3/P1QN1PPP/R4RK1 b - - ce 74; acd 15; acs >>999; pv Bxe3 fxe3 Rd6 Bb3 Be2 Nc4 Bxc4 Bxc4 Rhd8 Rad1 Rxd1 Rxd1 Rxd1+ Qxd1 Qxe4 >>Qe2 Ng4 Bxf7 Nxe3 a4; >> >> >>Of course, since this was a correspondence game, we should really let the >>computers think overnight. >> >>I strongly suspect that both Chess Tiger and Gambit Tiger will find the move >>under those circumstances. Both engines had a very long think on their last >>iteration, so the evaluation between the chosen move and the key move was close >>already. > >I also suspect that they may find another win by Bxe3 Probably both win. But Rxd2 is a lot prettier. ;-)
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