Author: J. Wesley Cleveland
Date: 17:05:15 09/18/01
Go up one level in this thread
On September 18, 2001 at 13:05:08, Gian-Carlo Pascutto wrote: [snip] >I would appreciate feedback about the positions, >especially if you think there is an incorrect >or dual soltion. Performance data of other amateur >or professional programs is appreciated too. >My latest Sjeng gets 80/200 at 10s on an Athlon 1000. > I have also been trying to clean the ecmf5 test set, but won't be done for a few weeks. Here are some comments (quoted comments are from the work done on ECM98 in CCC). >2k4r/1pp2ppp/p1p1bn2/4N3/1q1rP3/2N1Q3/PPP2PPP/R4RK1 w - - bm Nd5; id "ECM.952"; Nd5 may be the best move but it is not particularly convincing. "DarkThought" scores all three moves Nb5, Nd5, and Rad1 as roughly +0.5 but finally prefers Nd5, too (just slightly)." >5r2/1b2k2p/3bp3/5PP1/Bn1Q3P/1N6/1Pr5/1K3R2 b - - bm Rxb2+; id "ECM.993"; Rxb2+ is the "best" move but black is still totally lost. >3r1rk1/1b2bppp/2q1pn2/pp4Q1/3B1P2/PBN5/1PP3PP/R2R3K b - - bm Rxd4; id >"ECM.1004"; crafty likes Rxd4 immediately, switches to Nh5 at ply 10, and back to Rxd4 at ply 12 >b1n1r1k1/2q2p1p/p4Pp1/1pBP4/4B1P1/2P1Q3/P4K1P/4R3 w - - bm Qh6; id "ECM.1009"; "Qh6 leads to material gain, and Junior finds it quickly, but after a few seconds insists on the quiet and subtle Kg2! Black loses a rook at least." >r1bq1rk1/pp2bp1p/2p2np1/3p2B1/3P4/2NQ2N1/PPP2PPP/4RRK1 w - - bm Rxe7; id >"ECM.1068"; I believe this one is correct, but crafty finds it to be extremely difficult. >2k3r1/pp2rp2/1np5/2Np1p2/P2P3p/1R2P1Pq/2Q2P1P/1R4K1 w - - bm Nxb7; id >"ECM.1073"; ""DarkThought" says = [ a5 ] hxg3 fxg3 f4 Nxb7 ... is equally good (score = +1.3 after iteration #13, looks like a transposition)" >2r3k1/pp2n3/6pQ/4q3/8/2P1p1P1/P5BP/3R2K1 w - - bm Bd5+; id "ECM.1082"; crafty thinks this is correct, but with a draw score. >r1b4r/pp2ppk1/2np1np1/3N3p/2B1P3/q3BP2/P1PQ2PP/1R3RK1 w - - bm Nxe7; id >"ECM.1125"; correct, but extremely difficult >5Bk1/pr2pp1p/2b3pQ/2p1q3/8/2P4P/PP4P1/1B1Rb1K1 w - - bm Bg7; id "ECM.1161"; crafty thinks this is correct, but with a draw score. >rq3r1k/p2n1p2/1pbb1np1/2p2BB1/8/2N2N2/PP3QPP/3R1RK1 w - - bm Rxd6; id >"ECM.1169"; Qh4+ may be better. >6k1/p4pq1/2n1p1p1/1p1pP1N1/3P1QPP/8/P3K3/8 w - - bm Qc1; id "ECM.1176"; crafty thinks Qc1 is best quickly, but switches to Nf3 at ply 14, and back to Qc1 at ply 15, but after 5 hours, has a slight negative score. >6k1/1p3p2/4r1p1/1PPrbq1p/2QN4/P2R1P1P/R4KP1/8 b - - bm Bg3+; id "ECM.1208"; crafty thinks this is correct, but with a draw score. >2r2rk1/pp3qpp/8/3P1b2/3Q4/P1N1B3/5PKP/R2R4 b - - bm Rxc3; id "ECM.1217"; crafty likes Rxc3 after about 4 hours, but with no convincing score. >4rrk1/ppn3pp/2pb1n1q/3p4/1P1P4/P3BNP1/2P1BPKP/R2Q1R2 b - - bm Rxe3; id >"ECM.1285"; crafty thinks this is correct, but with a slight negative score. >r3k2N/pppbq1pp/5n2/3Ppn2/2BP4/2P3bP/PP2Q1P1/RNB2K1R b q - bm Bh2; id "ECM.1314"; crafty thinks this is correct, but with a slight negative score. >r3rbk1/p1q2pp1/1n5p/2pp4/4N3/1PQ3P1/PB2PP1P/3R1RK1 w - - bm Nf6+; id "ECM.1327"; crafty thinks this is correct, but with a draw score. >2kr3r/pp3p1p/2b1p3/q3Q3/5P2/2P1B3/P1P3PP/1R3RK1 b - - bm Rhg8; id "ECM.1335"; crafty finds Rhg8 instantly, takes 15 min to get a decent score. >2br1rk1/2qnQ2p/p4pp1/4p3/P1p1P1N1/2Pn1N1P/2B2PP1/1R1R1K2 w - - bm Rxd3; id >"ECM.1336"; >r2rnbk1/pp3ppp/1q4n1/3p1N2/5P2/1PQB4/PBP3PP/4RR1K w - - bm Nh6+; id "ECM.1339"; crafty goes back and forth among Nh6+, a3, and Qd4 >3rr1k1/1p1qb2p/pP4p1/2p2p2/4RQ2/3P4/1PPB2PP/4R1K1 w - - bm Bc3; id "ECM.1358"; I'm not sure about this one. crafty prefers Re6, but need to look deeper. >6k1/rnqb3p/5ppQ/2pPp3/p1N1P3/2PB3P/5PP1/1R4K1 w - - bm f4; id "ECM.1360"; I'm not sure about this one, either. Qh4 is another possibility >r1b2rk1/1p3pbp/2p3p1/p1q5/1P6/1Q4P1/1P2PPBP/R1B1R1K1 b - - bm Be6; id >"ECM.1529"; crafty switches between Be6 and Qe5, but with no convincing score. >1rb1r1k1/p1p1qppp/2pb4/8/2P3n1/4P1P1/PB2BP1P/R1QN1RK1 b - - bm Nxh2; id >"ECM.1533"; >8/8/1p1k4/5ppp/PPK1p3/6P1/5PP1/8 b - - bm f4; id "ECM.1536"; >r1b5/p2k1r1p/3P2pP/1ppR4/2P2p2/2P5/P1B4P/4R1K1 w - - bm Bxg6; id "ECM.1545"; crafty thinks cxb5 is much better. >4r3/p4pk1/6p1/P1pB2Pp/2P3b1/2p1N1P1/Qb1r1P2/6K1 b - - bm Rxe3; id "ECM.1572"; crafty thinks Kh7 is also very good. >r1b2r1k/ppppq1pp/2n1n3/6N1/2B2P2/4B3/PPP3PP/R2Q1RK1 w - - bm Nxh7; id >"ECM.1612"; I'm not sure about this one. If it is correct, it is very difficult >rn3rk1/pp1bppbp/1qp3p1/4P1N1/PP1PB3/2P1B3/4Q1PP/R4RK1 w - - bm Nxh7; id >"ECM.1617"; Another difficult one. >3rr1k1/1pq1nppp/p1p2b2/4pB2/2QPP3/P1P1B3/1P4PP/3R1RK1 w - - bm Bxh7+; id >"ECM.1618"; >2rrn1k1/2q2ppp/p2pp3/1p2P1P1/4B3/P5Q1/1PP3PP/R4R1K w - - bm Bxh7+; id >"ECM.1620"; >r2q3r/2pkb1p1/p2p1n2/4p1p1/Pp2P1P1/1QP5/1P1P2PP/RNB2RK1 b - - bm Rxh2; id >"ECM.1621"; >2rq1rk1/pp1bnpbp/4p1p1/3pP1N1/3P2Q1/2PB4/P4PPP/R1B1R1K1 w - - bm Nxh7; id "I don't know about this. The continuation I analyze is 1... Rxh2 2.Kxh2 Qh8+ 3.Kg1 Nxg4 4.Rf7 Qh2+ 5.Kf1 Qh1+ 6.Ke2 Qxg2+ (not Qxc1 7.Rf1) 7.Kd3 Nf2+ 8.Rxf2 is unclear." >"ECM.1622"; >2rq1bk1/1br2p1p/p2p2p1/1p1P4/4Q3/PP3N2/1BP5/1K1R3R w - - bm Rxh7; id "ECM.1623"; Also very difficult. If there are any of my comments you disagree with, please let me know (preferably with analysis). I may have more comments later. I'm going to implement a second-best option in crafty, so I can see which moves are significantly better than the rest.
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