Author: Robert Hyatt
Date: 06:12:24 12/08/97
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On December 08, 1997 at 01:27:12, Jouni Uski wrote: >I have Kurt Richter's book "Kombinationen" 7. Edition. It contains about >400 tactical positions. Most are too easy for today programs. But there >is >14 positions, which cause problems at least to some: > > >2k4r/pp3ppp/2p2n2/5PBb/P3P3/2Nr3P/1PB2bP1/R3R2K b - - id "10"; >rn2kb1r/p3qppp/2p2n2/1p2p1B1/2B1P3/1QN5/PPP2PPP/R3K2R w KQkq - id "21"; >r3rnk1/pbq1b1pp/1pp1pp2/4N3/2PP2Q1/3B4/PP1B1PPP/R3R1K1 w - - id "71"; >3r2rk/2q2p1p/p2p1pn1/1p1PnN1Q/2p1P3/2P3B1/PPBN2K1/R7 w - - id "77"; >r4rk1/1R3p1p/p3pBpP/qb1pP3/2nP4/P2Q1N2/5PP1/2R3K1 w - - id "126"; >q5rr/1b2b1k1/pp2p1p1/2p1PpP1/2P2P1R/2BB3R/PP5Q/4K3 w - - id "146"; >r6r/p2Rbk1p/2p2p2/q6b/8/2N2N1P/P1PP1PP1/2BQ2K1 w - - id "205"; >2r2rk1/1p1bbppp/p2ppn2/q7/4PP2/2N1BB2/PPP3PP/R3QR1K w - - id "224"; >rn1q1r2/pb3pk1/4p1p1/4P1P1/1ppP1N2/8/PPB2PP1/R2QK2R w KQ - id "257"; >r4k1r/ppp3pp/2n1bp2/7B/q3PB2/2Q5/PP1R1PPP/2KR4 w - - id "266"; >r1bn1rk1/5p1p/1qp2p1Q/ppb1pP2/3pP2N/P1NP2P1/BPP1K2P/R4R2 w - - id "297"; >r1b1r1k1/1p1n1p1p/2ppnqp1/8/p1P1P3/5P2/PbNQNBPP/1R2RBK1 w - - id "328"; >r1bqnrk1/pp1pppbp/6p1/n3P3/3N4/1BN1B3/PPP2PPP/R2QK2R w KQ - id "364"; >1k6/p7/1p3P2/3QP3/8/4q3/6PP/2r2R1K w - - id "398"; > >Solutions: > 1 Rxh3+ > 2 Nxb5 > 3 Bxh7+ > 4 Qxh7+ > 5 Qxg6+ > 6 Bxf5 > 7 Nd5 > 8 Nd5 > 9 Rh7+ >10 Rd7 >11 Na4 >12 Rxb2 >13 Bxf7+ >14 Qf3 > > > Fritz 4.01 Rebel 9 Mchess 6 > > 1 0:40 0:18 0:05 > 2 6:47 -- 4:50 > 3 -- 6:18 5:47 > 4 0:18 0:10 0:04 > 5 -- 2:04 0:16 > 6 0:01 0:45 0:18 > 7 -- -- -- > 8 2:47 1:14 3:46 > 9 0:52 3:19 0:34 >10 1:20 1:29 1:10 >11 5:31 -- 8:32 >12 3:23 -- 0:08 >13 0:01 1:41 0:26 >14 1:48 9:06 0:47 > >I have tested in 486/150 Mhz PC. Times are to find AND hold. >For some reason Mchess is best even if it speed is only about 7000 NPS. >I am interested about Crafty, Ferrer, Nimzo and Shredder solution times. > >Jouni Crafty 14.3: 1 Mat06 3.97 seconds 2 +1.00 .91 seconds 3 not found in 3 minutes 4 Mat07 1.55 seconds 5 +0.00 1.04 seconds 6 +3.60 3.24 seconds 7 +2.70 (Qe1) 4 seconds) (incorrect) 8 equal .15 seconds 9 +5.20 52.33 seconds 10 +1.32 2:19 11 +1.00 (Nd1) .01 seconds. (incorrect) 12 not solved 13 0.00 .31 seconds 14 +5.60 9.66 seconds The evals are not the best score seen, rather they are the score at the time crafty changed to the "solution" move. IE it is possible/probable that at deeper searches, the score got even better, but this gives an idea of what it saw at the time it decided the solution move was best. Note that the time was not recorded until it "held" the correct move from that time to the end of the search (I gave a 4 min max)...
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