Author: Uri Blass
Date: 10:20:32 06/26/03
Go up one level in this thread
On June 26, 2003 at 12:48:36, Andrew Williams wrote: >On June 26, 2003 at 11:18:26, Igor Gorelikov wrote: > >>One Test position >>================== >> >>There is a section of everyday's puzzles on my site: >>http://www.digichess.gr/infiniteloop/home.php >> >>All puzzles are taken from engine to engine games of Infinite Loop. >> >>Prior to publish a puzzle on my site I always offer Crafty 19.3 to solve it. >> >>I was amazed that today's puzzle was hard to solve even for Crafty so it >>can be a good test position for any chess engine. >> >>What Phalanx XXII (engine number 10 among free WB engines) plays here as >>white (and find it at once)? >> >>[D] r1bq3r/ppp3pp/3k4/3p4/3nP1Q1/8/PP4PP/RN3RK1 w - - 0 17 >> >>PS: Yace can find it after some time too. >> >>Best regards, >>Igor Gorelikov > >PostModernist (Athlon 1200) likes e5+ after about 2.5 seconds and sticks with it >for a long time. It's currently searching depth 14 after 31 minutes, and the >score is rising above +1 for the first time: > > 8> +0.00 00:00:01.29 124572 1.Qg3 Ke6 2.Qg4 Kd6 3.Qg3 Ke6 4.Qg4 Kd6 > 5.Qg3 Ke6 6.Qg4 Kd6 7.Qg3 Ke6 8.Qg4 Kd6 > 8b +0.01 00:00:02.51 273552 1.e5 Kxe5 2.Qxg7 Kd6 3.Qxd4 > 8< +0.36 00:00:03.06 357675 1.e5 > 8= +0.34 00:00:03.07 359990 1.e5 Kxe5 2.Qxg7 Kd6 3.Qxd4 c6 4.Qf4 Kc5 > 5.b4 Kb6 6.Nc3 > 9< +0.34 00:00:08.25 1139143 1.e5 > 9> +0.25 00:00:08.98 1287446 1.e5 Kxe5 2.Qxg7 Kd6 3.Qxd4 Be6 4.Nc3 Rf8 > 5.Qb4 Kd7 6.Qxb7 > 9= +0.26 00:00:09.17 1342746 1.e5 Kxe5 2.Qxg7 Kd6 3.Qxd4 Be6 4.Nc3 Rf8 > 5.Qb4 Kd7 6.Qxb7 >10> +0.26 00:00:09.98 1454792 1.e5 Kxe5 2.Qxg7 Kd6 3.Qxd4 Be6 4.Nc3 Rf8 > 5.Rfe1 Ke7 6.Rad1 >10< +0.82 00:00:28.91 4055771 1.e5 >10= +0.75 00:00:31.10 4507277 1.e5 Kxe5 2.Qxg7 Kd6 3.Qxd4 Be6 4.Nc3 Rf8 > 5.Ne4 Kc6 6.Rfc1 Kd7 7.Nc5 >11< +0.75 00:01:23.76 11351577 1.e5 >11> +0.61 00:01:47.63 15449058 1.e5 Kxe5 2.Qxg7 Kd6 3.Qxd4 Be6 4.Nc3 c6 > 5.Ne4 Kc7 6.Qe5 Kb6 7.Qxe6 dxe4 8.Qxe4 >11= +0.65 00:01:48.33 15571854 1.e5 Kxe5 2.Qxg7 Kd6 3.Qxd4 Be6 4.Nc3 c6 > 5.Ne4 Kc7 6.Qe5 Kb6 7.Qxe6 dxe4 8.Qxe4 >12< +0.65 00:04:48.80 41307350 1.e5 >12> +0.45 00:07:08.63 64619637 1.e5 Kxe5 2.Qxg7 Kd6 3.Qxd4 Be6 4.Re1 Kd7 > 5.Nc3 c6 6.Qg7 Qe7 7.Qe5 Qf7 >12= +0.50 00:07:09.79 64831671 1.e5 Kxe5 2.Qxg7 Kd6 3.Qxd4 Be6 4.Re1 Kd7 > 5.Nc3 c6 6.Qg7 Qe7 7.Qe5 Qf7 >13> +0.50 00:07:47.04 69753705 1.e5 Kxe5 2.Qxg7 Kd6 3.Qxd4 Be6 4.Nc3 c6 > 5.Ne4 Kc7 6.Nc5 Qd6 7.Qg7 Bd7 8.Nxd7 Qxd7 > 9.Rf7 >13< +0.85 00:25:22.84 221484627 1.e5 >13= +0.83 00:26:17.63 230022136 1.e5 Kxe5 2.Qxg7 Kd6 3.Qxd4 Be6 4.Nc3 c6 > 5.Rae1 Re8 6.Qg7 Qc7 7.Qe5 Kd7 >14> +0.83 00:29:35.61 254958737 1.e5 Kxe5 2.Qxg7 Kd6 3.Qxd4 Be6 4.Nc3 c6 > 5.Rae1 Re8 6.Qg7 Qc7 7.Ne4 dxe4 8.Rd1 > > >It's going to take a long time to complete depth 14, so here is PM's "analysis >mode" output after 37 minutes: > >time:00:37:48:04 >depth=14 score=+125 >nodes=319377591 nps=140756 >[+125 <= +132 <= +100000] >PV: 1.e5 Kxe5 2.Qxg7 Kd6 3.Qxd4 Be6 4.Nc3 c6 5.Rae1 Re8 > 6.Qg7 Qc7 7.Ne4 dxe4 8.Rd1 > >This means that PM's MTD(f) search has established that the score is > +1.25 and >is now checking to see if it's higher or lower than +1.32 > >Cheers > >Andrew Here is Fritz8's analysis Fritz8 finds the right move but not the right score. New game r1bq3r/ppp3pp/3k4/3p4/3nP1Q1/8/PP4PP/RN3RK1 w - - 0 1 Analysis by Fritz 8: 1.e5+ Kxe5 ± (1.06) Depth: 7/12 00:00:00 16kN 1.e5+ Kxe5 2.Qf4+ ± (1.06) Depth: 8/12 00:00:00 16kN 1.e5+ Kxe5 2.Qf4+ Ke6 3.Qxd4 Rf8 ± (1.06) Depth: 9/30 00:00:00 241kN 1.e5+ Kxe5 2.Qf4+ Ke6 3.Qxd4 Rf8 4.Nc3 Rxf1+ 5.Rxf1 Qg5 6.Nb5 Qe5 ± (0.94) Depth: 10/33 00:00:05 1468kN 1.e5+-- ² (0.66) Depth: 11/34 00:00:22 7223kN 1.e5+ Kxe5 2.Qxg7+ ² (0.66) Depth: 11/35 00:00:25 8300kN 1.e5+ Kxe5 2.Qxg7+ Kd6 3.Qxd4 c5 4.Rf6+ Be6 5.Qf4+ Kd7 6.Nc3 Rf8 7.Nxd5 ² (0.63) Depth: 12/37 00:01:16 26073kN 1.e5+ Kxe5 2.Qxg7+ Kd6 3.Qxd4 c5 4.Rf6+ Be6 5.Qf4+ Kd7 6.Nc3 Rf8 7.Nxd5 Rxf6 8.Nxf6+ Kc8 9.Re1 ± (0.72) Depth: 13/40 00:04:52 100700kN (Blass, Tel-Aviv 26.06.2003) 1...Kxe5 and 2...Kd6 are forced to avoid 2.xx or 3.xx scores against black. Even after 3.Qxd4 Fritz8 needs time to find the big problem. New game r1bq3r/ppp4p/3k4/3p4/3Q4/8/PP4PP/RN3RK1 b - - 0 1 Analysis by Fritz 8: 3...c5 4.Rf6+ Be6 5.Qf4+ Kd7 6.Nd2 Rf8 7.Qa4+ Ke7 8.Rff1 ² (0.69) Depth: 6/21 00:00:00 39kN 3...c5 4.Rf6+ Be6 5.Qf4+ Kd7 6.Nd2 Rf8 7.Qa4+ Ke7 8.Rff1 ² (0.69) Depth: 7/18 00:00:00 58kN 3...c5 4.Rf6+ Be6 5.Qf4+ Kd7 6.Nc3 Rf8 7.Nxd5 Rxf6 8.Nxf6+ Kc8 9.Rc1 Qe7 ² (0.62) Depth: 8/25 00:00:01 227kN 3...c5-- ± (0.91) Depth: 9/30 00:00:03 756kN 3...c5 4.Qf4+ Kc6 5.Nc3 Be6 6.Rae1 Re8 7.Qh6 Qd6 8.Rf6 ± (0.94) Depth: 9/32 00:00:04 1118kN 3...c5 4.Qf4+ Kc6 5.Qh6+ Kc7 6.Rf7+ Bd7 7.Nc3 Kc8 8.Nxd5 Re8 9.Qd6 b6 10.Raf1 ± (1.16) Depth: 10/29 00:00:08 2434kN 3...c5 4.Qf4+ Kc6 5.Qh6+ Kc7 6.Rf7+ Bd7 7.Nc3 Kc8 8.Nxd5 Re8 9.Qd6 b6 10.Raf1 ± (1.16) Depth: 11/34 00:00:19 6192kN 3...c5-- +- (1.44) Depth: 12/35 00:00:34 11425kN 3...c5 4.Qf4+ Kc6 +- (1.44) Depth: 12/48 00:01:17 27035kN 3...Be6! +- (1.41) Depth: 12/48 00:02:15 48715kN 3...Be6-- +- (1.69) Depth: 13/35 00:02:57 63394kN 3...Be6 4.Nc3 c6 5.Ne4+ Kc7 6.Nc5 Re8 7.Qg7+ Re7 8.Nxe6+ Kd6 9.Nxd8 Rxg7 10.Nf7+ +- (1.97) Depth: 13/54 00:05:19 114584kN 3...c5! +- (1.94) Depth: 13/54 00:05:50 126407kN 3...c5! +- (1.78) Depth: 13/54 00:06:09 133871kN 3...c5 4.Qf4+ Kc6 5.Qh6+ Kc7 6.Rf7+ Bd7 7.Nc3 Kc8 8.Nxd5 b6 9.Rd1 +- (1.69) Depth: 13/54 00:06:46 147815kN (Blass, Tel-Aviv 26.06.2003) Movei has no problem to find the move e5+ and here is some analysis I guess that it needs more time to find big score for white. New game r1bq3r/ppp3pp/3k4/3p4/3nP1Q1/8/PP4PP/RN3RK1 w - - 0 1 Analysis by movei00_8_077: 1.e5+ Kxe5 2.Re1+ Kd6 3.Qxd4 = (-0.04) Depth: 1 00:00:00 1.e5+ Kxe5 2.Re1+ Kd6 3.Qxd4 = (-0.04) Depth: 2 00:00:00 1.e5+ Kxe5 2.Re1+ Kd6 3.Qxd4 = (-0.04) Depth: 2 00:00:00 1.e5+ Kxe5 2.Qxg7+ Kd6 3.Qxd4 ± (1.12) Depth: 3 00:00:00 1.e5+ Kxe5 2.Qxg7+ Kd6 3.Qxd4 ± (1.12) Depth: 3 00:00:00 1.e5+ Kxe5 2.Qxg7+ Kd6 3.Qxd4 Qg8 = (0.05) Depth: 4 00:00:00 1.e5+ Kxe5 2.Qxg7+ Kd6 3.Qxd4 Qg8 = (0.05) Depth: 4 00:00:00 1.e5+ Kxe5 2.Qxg7+ Kd6 3.Qxd4 c5 4.Qf4+ Kc6 5.Nc3 = (-0.01) Depth: 5 00:00:00 1.Qg3+ = (0.00) Depth: 5 00:00:01 1.Qg3+ Ke6 2.Qg4+ Kd6 = (0.00) Depth: 5 00:00:01 1.Qg3+ Ke6 2.Qg4+ Kd6 = (0.00) Depth: 5 00:00:01 1.Qg3+ Ke6 2.Qg4+ Kd6 = (0.00) Depth: 6 00:00:01 225kN 1.e5+ = (0.01) Depth: 6 00:00:01 258kN 1.e5+ Kxe5 2.Qxg7+ Kd6 3.Qxd4 c5 4.Qf4+ Kc6 5.Qh6+ Kc7 6.Nc3 = (0.10) Depth: 6 00:00:02 357kN 1.e5+ Kxe5 2.Qxg7+ Kd6 3.Qxd4 c5 4.Qf4+ Kc6 5.Qh6+ Kc7 6.Nc3 = (0.10) Depth: 6 00:00:02 378kN 1.e5+ Kxe5 2.Qxg7+ Kd6 3.Qxd4 c6 4.Nd2 Re8 5.Rac1 = (0.03) Depth: 7 00:00:04 762kN 1.e5+ Kxe5 2.Qxg7+ Kd6 3.Qxd4 c6 4.Nd2 Re8 5.Rac1 = (0.03) Depth: 7 00:00:07 1262kN 1.e5+ Kxe5 2.Qxg7+ Kd6 3.Qxd4 Qg8 4.Nd2 Kd7 5.Ne4 Kd8 6.Qf6+ Kd7 = (0.25) Depth: 8 00:00:13 2243kN 1.e5+ Kxe5 2.Qxg7+ Kd6 3.Qxd4 Qg8 4.Nd2 Kd7 5.Ne4 Kd8 6.Qf6+ Kd7 = (0.25) Depth: 8 00:00:19 3494kN 1.e5+ Kxe5 2.Qxg7+ Kd6 3.Qxd4 c6 4.Nd2 Kc7 5.Qe5+ Kb6 6.a4 Ka6 7.b4 ² (0.51) Depth: 9 00:00:38 6753kN 1.e5+ Kxe5 2.Qxg7+ Kd6 3.Qxd4 c6 4.Nd2 Kc7 5.Qe5+ Kb6 6.a4 Ka6 7.b4 ² (0.51) Depth: 9 00:01:30 15879kN 1.e5+ Kxe5 2.Qxg7+ Kd6 3.Qxd4 Be6 4.Nc3 Kd7 5.Nxd5 Kc8 6.Ne7+ Kb8 7.Rad1 Qe8 ² (0.63) Depth: 10 00:03:38 38274kN (Blass, Tel-Aviv 26.06.2003) Uri
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