Author: Uri Blass
Date: 04:28:35 06/03/02
Go up one level in this thread
On June 02, 2002 at 19:30:06, José Carlos wrote: >On June 02, 2002 at 12:46:55, Jon Dart wrote: > >>Some new test positions from Arasan games: >> >>This one is pretty elementary but still cute. White can rip the pawn with Nxc5. >>Check extensions are essential to see that the knight can't be touched. >> >>[D] r1br2k1/2q1p2p/p4ppB/npp5/2n1P3/2PN1QP1/P4PBP/1R1R2K1 w - - >> >>Here is another nice sac. After Rxc6, the Black rook on e4 can be trapped: >> >>[D] 5rk1/1p3p1p/p1bRpBp1/4P3/1P2r3/2P3K1/1P4PP/7R w - - >> >>This one is from a test game vs. Phalanx (always a good opponent). Arasan played >>Rb8? and lost, but Qg5! wins. Pharaon finds this pretty quickly, but both Crafty >>18.10 and Arasan take quite a long time: >> >>[D] r2qkb1r/pB1n1ppp/4p3/3p4/8/1P2Pb2/P1QP1PPP/RNB2RK1 b kq - > > Thanks for the positions. Averno finds them three, but takes a while, >specially the last one. > > José C. The last position is also the hardest for the latest movei when it can solve the first 2 positions in less than a minute on p800. Here is some analysis of the latest movei(p800 64 Mbytes hash) First position: 7 -28 553 519832 f3f4 c7b6 e4e5 f6e5 d3e5 c8f5 d1d8 b6d8 b1c1 7-28 966 1152666 f3f4 c7b6 e4e5 f6e5 d3e5 c8f5 d1d8 b6d8 b1c1 8 -26 1194 1478613 f3f4 c7b6 e4e5 a8a7 g2e4 f6f5 e4f3 c8e6 8 -25 1487 1895783 d3c5 8 36 2076 2777710 d3c5 a5b7 c5d3 c8e6 e4e5 e6d5 f3d5 d8d5 g2d5 g8h8 e5e6 8 36 2180 2911357 d3c5 a5b7 c5d3 c8e6 e4e5 e6d5 f3d5 d8d5 g2d5 g8h8 e5e6 9 32 8150 11927765 d3c5 a5c6 e4e5 d8d1 b1d1 c4e5 f3d5 g8h8 f2f4 e7e6 c5e6 c8e6 d5e6 9 32 8876 13069833 d3c5 a5c6 e4e5 d8d1 b1d1 c4e5 f3d5 g8h8 f2f4 e7e6 c5e6 c8e6 d5e6 10 36 23481 34220755 d3c5 a5b7 c5d3 c8e6 b1c1 a8c8 f3e2 e6d7 d3b4 b7c5 Second position first solved for positional reasons and later for tactical reasons: 10 -5 1613 2641913 h1d1 c6d5 g3f2 e4c4 d6d8 f8d8 f6d8 c4g4 g2g3 g8g7 10 -5 1888 3064880 h1d1 c6d5 g3f2 e4c4 d6d8 f8d8 f6d8 c4g4 g2g3 g8g7 11 0 4022 6967195 h1d1 c6d5 g3f2 e4f4 f2g3 f4e4 11 1 4990 8979269 d6c6 11 6 5218 9485170 d6c6 b7c6 g3f3 e4c4 h1c1 g6g5 f6g5 h7h5 b2b3 c4g4 g5f6 11 6 6017 11154483 d6c6 b7c6 g3f3 e4c4 h1c1 g6g5 f6g5 h7h5 b2b3 c4g4 g5f6 12 -6 6575 12335106 d6c6 b7c6 g3f3 e4c4 h1c1 g6g5 f6g5 h7h5 g5f6 f8b8 c1d1 h5h4 12 -6 13121 23988150 d6c6 b7c6 g3f3 e4c4 h1c1 g6g5 f6g5 h7h5 g5f6 f8b8 c1d1 h5h4 13 195 18507 34623701 d6c6 b7c6 g3f3 e4c4 h1c1 g6g5 g2g3 g5g4 f3e2 f8b8 b2b3 b8b4 b3c4 b4b2 e2e3 b2h2 13 195 21777 41477201 d6c6 b7c6 g3f3 e4c4 h1c1 g6g5 g2g3 g5g4 f3e2 f8b8 b2b3 b8b4 b3c4 b4b2 e2e3 b2h2 14 254 27983 54356548 d6c6 b7c6 g3f3 e4c4 h1c1 g6g5 g2g3 f8b8 b2b3 c4b4 c3b4 b8b4 c1c6 b4b3 f3e4 14 254 30127 58205122 d6c6 b7c6 g3f3 e4c4 h1c1 g6g5 g2g3 f8b8 b2b3 c4b4 c3b4 b8b4 c1c6 b4b3 f3e4 latest position is solved only for tactical reasons and it takes almost 30 minutes to fail highand almost 2 hours to solve the fail high. 10 -5 13953 16660100 a8b8 g2f3 d8g5 g1h1 g5f6 c2c7 f6f3 h1g1 f3g4 c7g3 g4g3 f2g3 b8b7 c1b2 e6e5 b1c3 11 -74 28061 39338247 a8b8 c2c6 f3e2 f1e1 e2d3 b1c3 f8c5 c1b2 d8b6 c6b6 a7b6 11 -73 43701 65393198 f8d6 11 -30 72457 110863192 f8d6 g2g3 a8b8 b7c6 b8c8 c1a3 d6a3 b1a3 d8a5 c6d7 e8d7 c2b2 e6e5 11 -30 78425 120905642 f8d6 g2g3 a8b8 b7c6 b8c8 c1a3 d6a3 b1a3 d8a5 c6d7 e8d7 c2b2 e6e5 12 -38 127173 199201106 f8d6 g2g3 a8b8 c2c6 d8c7 c6c7 d6c7 b7c6 f3e2 f1e1 e2b5 c6d7 b5d7 b1c3 12 -37 163705 258882699 d8g5 12 305 678725 1004344488 d8g5 g2g3 g5g4 b7d5 e6d5 c2c6 a8b8 c6a4 g4a4 b3a4 f8c5 b1c3 12 305 686247 1017406059 d8g5 g2g3 g5g4 b7d5 e6d5 c2c6 a8b8 c6a4 g4a4 b3a4 f8c5 b1c3 Uri
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