Author: Jouni Uski
Date: 22:27:12 12/07/97
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
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