Author: Uri Blass
Date: 07:33:04 07/20/04
Go up one level in this thread
On July 20, 2004 at 10:13:37, Uri Blass wrote: >On July 19, 2004 at 07:31:35, Omid David Tabibi wrote: > >>It is well known that the ECM test suite has a large number of erros and >>inaccuracies. GCP has compiled a test suite which doesn't include the more >>problematic positions. But I wanted to take a look at all 879 positions of ECM >>and correct them. >> >>On my AMD64 3200+, I ran Junior 8, Deep Fritz 8, Shredder 8, and Falcon for 10 >>seconds per position. Results were: >> >>Shredder 8: 696 >>Deep Fritz 8: 696 >>Falcon: 680 >>Junior 8: 637 >> >>Next, I analyzing all the positions were all the engines failed to solve (about >>100 positions). The resived test suite can be downloaded from: >> >>http://www.cs.biu.ac.il/~davoudo/pubs/ecmx.epd >> >>Each of these 100 positions was of one of the following types: >> >>1. Correct move, but requires very deep search. Naturally I didn't change >>anything. >> >>2. Correct move, but there are additional winning moves. I added the other >>winning moves. Sometimes the alternative winning moves were much better, but I >>didn't remove the original move, as long as it was not a blunder. >> >>3. Blunder or bad moves. Some suggested best moves are simply blunders. It seems >>that these moves have been introduced as a result of typos (e.g. Bd4 instead of >>Bc4). In some other cases the best move is wrong because the defending side has >>a nice (and usually deep) defense, apparently not taken into consideration when >>compiling the test suite. >> >>4. I didn't find any win for the suggested best move, or am not sure whether it >>is indeed the best move. There are 26 such positions which appear below. It >>would be nice if you could analyze them longer and see whether the suggested >>best move is indeed the best, or alternatives should be added: >> >>r3r1k1/pp3ppp/1qp5/2bbNQ2/5B2/2P5/PP3PPP/3RR1K1 w - - bm Rxd5; id "ECM.349"; >>1k2rb1r/pbp1q1pp/2pp4/2PnpP2/Q7/1P3NP1/PB5P/2KR1B1R w - - bm Rxd5; id "ECM.371"; >>2bq1b2/1p3k2/1r1p1p1p/pNpP1PpP/P1P3P1/6B1/1P5Q/2K1R3 w - - bm Re6; id "ECM.396"; >>rq1r2k1/3nbp1p/p2p2p1/1p1Pp1P1/3B1P2/3B3Q/PPP4P/2KR2R1 w - - bm f5; id >>"ECM.497"; >>r3k1r1/pb1qpp1p/1pnp1n1B/2p2R2/3PP3/2P3PN/P1P3BP/R2Q3K b q - bm Nxe4; id >>"ECM.561"; >>8/p5k1/2p2p2/4p1p1/1p2P3/1P4PP/1PP5/5K2 b - - bm g4; id "ECM.601"; > >Movei found the move and based on another post it may be one of the moves that >leads to draw. > >>8/8/4b1p1/2Bp3p/5P1P/1pK1Pk2/8/8 b - - bm g5; id "ECM.605"; >>4r2k/3n1Qpp/1pRP1p2/p4P2/1p1P2P1/6rP/P3q1B1/6RK w - - bm Qe6; id "ECM.624"; >>r1b2rk1/2q1bppp/p1n1p3/1p1np1P1/5P2/1NNBBQ2/PPP4P/R4RK1 w - - bm Bxh7+; id >>"ECM.665"; >>2rqr1k1/1p1bbppp/p3p3/n7/3P2Q1/2PB1N2/P4PPP/R1B1R1K1 w - - bm Bxh7+; id >>"ECM.673"; >>r1b2r1k/ppppq1pp/2n1n3/6N1/2B2P2/4B3/PPP3PP/R2Q1RK1 w - - bm Nxh7; id "ECM.674"; >>rn1q1rk1/pb1p1ppp/4p3/2pnP3/1bp5/2N2N2/PP3PPP/RBBQK2R w KQ - bm Bxh7+; id >>"ECM.675"; >>r1b2rk1/1pq2ppp/p1p1p3/2n1P3/2N2P2/3B4/PPP3PP/R2Q1RK1 w - - bm Bxh7+; id >>"ECM.677"; >>2k3r1/ppq2p1p/n1Pb1p2/8/6r1/4BN1b/PPQ2PPP/R3RBK1 b - - bm Bxh2+; id "ECM.698"; >>r5k1/pn1q1rpp/2pp4/5R1N/bP6/4BQ2/P4PPP/2R3K1 w - - bm Nxg7; id "ECM.714"; >>4kbr1/pp1bpp1p/3p1p2/3N4/1PBQP3/q7/P1r2PPP/R4RK1 b - - bm Rxg2+; id "ECM.725"; >>r3r1k1/pbq1ppbp/1pp2np1/4N3/3P4/2P5/PPB1QPPP/R1B1R1K1 w - - bm Nxf7; id >>"ECM.762"; >>2rqr1k1/pb2bp1p/1pn1pnpB/4N3/3P4/P1N3R1/1P3PPP/RB1Q2K1 w - - bm Rxg6+; id >>"ECM.810"; >>1q1r3k/3P1pp1/ppBR1n1p/4Q2P/P4P2/8/5PK1/8 w - - bm Rxf6; id "ECM.825"; >>rr4k1/5p1p/n2p1npQ/q1pP4/6P1/2N2P1N/PP1R3P/2K4R b - - bm Rxb2; id "ECM.853"; >>5rk1/5rp1/p2qb3/R2Np2Q/3bP2B/7P/P5PK/1R6 b - - bm Rf1; id "ECM.856"; >>3r1rk1/p3q1pp/2Rb4/3P4/8/1P2Qp2/PB3PPP/3R2K1 b - - bm Bxh2+; id "ECM.858"; >>8/2q1np1k/6p1/1PPn3p/8/P2Q3P/6P1/2R4K b - - bm Nf5; id "ECM.864"; >>7R/1p1r4/2b2p2/2Pp1qk1/3P1bp1/3N4/2Q2PB1/6K1 w - - bm Rg8+; id "ECM.866"; > >It is one of the problems that Movei needs slightly more than 10 seconds to find >the suggested move. >Is there a better move than Rg8? > >Movei's score at depth 14 is 0.04 pawns against white. >I will give it to continue to search because it may change it's mind. > >Uri The score of Movei was 0.00 at depth 15 and 16 Now I ask Fritz to see if it suggests a better move. Fritz8 suggests Qe2 0.22/14 0.25/15 and I will give it more time. Uri
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