Author: Peter Berger
Date: 10:35:45 12/13/00
I have a question regarding Crafty 17.13's analysis to "A testposition for
chessprograms" posted by
Uri Blass recently ( http://icdchess.com/forums/1/message.shtml?144190 ):
Test 1 :
White(1): setboard b7/1q2p2k/3p1p1p/1Pr1nP2/6PP/1rN5/2RKBQ2/2R5 b - - 0 1
Black(1): search Rd5
Black(1): analyze
Analyze Mode: type "exit" to terminate.
clearing hash tables
time surplus 0.00 time limit 30.00 (3:00)
nss depth time score variation (1)
starting thread 1
starting thread 2
starting thread 3
...
13 3:10 0.87 1. ... Rd5+ 2. Nxd5 Qxd5+ 3. Ke1 Rh3
4. Rc3 Rh1+ 5. Bf1 Nd3+ 6. Rxd3 Qxd3
7. g5 hxg5 8. hxg5 Qe4+ 9. Kd2 fxg5
10. Re1 Qb7
13-> 3:10 0.87 1. ... Rd5+ 2. Nxd5 Qxd5+ 3. Ke1 Rh3
4. Rc3 Rh1+ 5. Bf1 Nd3+ 6. Rxd3 Qxd3
7. g5 hxg5 8. hxg5 Qe4+ 9. Kd2 fxg5
10. Re1 Qb7
14 7:24 ++ 1. ... Rd5+!!
14 46:59 2.17 1. ... Rd5+ 2. Nxd5 Qxd5+ 3. Ke1 Rh3
4. Rc3 Rh1+ 5. Bf1 Nd3+ 6. Rxd3 Qxd3
7. Rd1 Qxb5 8. Qe2 Qxe2+ 9. Kxe2 Rxh4
10. Rd4 Rh2+ 11. Ke3 Bc6
14-> 46:59 2.17 1. ... Rd5+ 2. Nxd5 Qxd5+ 3. Ke1 Rh3
4. Rc3 Rh1+ 5. Bf1 Nd3+ 6. Rxd3 Qxd3
7. Rd1 Qxb5 8. Qe2 Qxe2+ 9. Kxe2 Rxh4
10. Rd4 Rh2+ 11. Ke3 Bc6
15 73:28 2.26 1. ... Rd5+ 2. Nxd5 Qxd5+ 3. Ke1 Rh3
4. Rc3 Rh1+ 5. Bf1 Nd3+ 6. Rxd3 Qxd3
7. Rd1 Qxb5 8. Qe2 Qxe2+ 9. Kxe2 Rxh4
10. Rd4 h5 11. Ra4 Bd5
15-> 73:28 2.26 1. ... Rd5+ 2. Nxd5 Qxd5+ 3. Ke1 Rh3
4. Rc3 Rh1+ 5. Bf1 Nd3+ 6. Rxd3 Qxd3
7. Rd1 Qxb5 8. Qe2 Qxe2+ 9. Kxe2 Rxh4
10. Rd4 h5 11. Ra4 Bd5
Test 2 :
White(1): setboard b7/1q2p2k/3p1p1p/1Pr1nP2/6PP/1rN5/2RKBQ2/2R5 b - - 0 1
Black(1): analyze
Analyze Mode: type "exit" to terminate.
clearing hash tables
time surplus 0.00 time limit 4:20 (4:20)
nss depth time score variation (1)
starting thread 1
starting thread 2
starting thread 3
...
13 104:47 0.92 1. ... Kg7 2. h5 Kh7 3. Qf1 Qc7 4.
Qf4 Nc4+ 5. Bxc4 Rxc4 6. Qe3 Rxg4 7.
Qe6 Rg2+ 8. Ke1 Rg1+ 9. Kd2 Rxc1 10.
Rxc1
13-> 111:57 0.92 1. ... Kg7 2. h5 Kh7 3. Qf1 Qc7 4.
Qf4 Nc4+ 5. Bxc4 Rxc4 6. Qe3 Rxg4 7.
Qe6 Rg2+ 8. Ke1 Rg1+ 9. Kd2 Rxc1 10.
Rxc1
14 246:36 1.20 1. ... Kg7 2. h5 Qc7 3. Qd4 Nc4+ 4.
Bxc4 Rxc4 5. Qe3 Be4 6. Nxe4 Rxc2+
7. Rxc2 Qxc2+ 8. Kxc2 Rxe3 9. Nc3 Rg3
10. Nd5 Rxg4 11. Nxe7
14-> 268:29 1.20 1. ... Kg7 2. h5 Qc7 3. Qd4 Nc4+ 4.
Bxc4 Rxc4 5. Qe3 Be4 6. Nxe4 Rxc2+
7. Rxc2 Qxc2+ 8. Kxc2 Rxe3 9. Nc3 Rg3
10. Nd5 Rxg4 11. Nxe7
15 773:32 1.22 1. ... Kg7 2. Qf1 Rb4 3. Qf2 Nf3+ 4.
Bxf3 Qxf3 5. Qxf3 Bxf3 6. Rg1 Kf7 <HT>
(4) 15-> 876:46 1.22 1. ... Kg7 2. Qf1 Rb4 3. Qf2 Nf3+ 4.
Bxf3 Qxf3 5. Qxf3 Bxf3 6. Rg1 Kf7 <HT>
(3) 16 1129:40 1.32 1. ... Kg7 2. Qf1 Rb4 3. Qf2 Nf3+ 4.
Bxf3 Qxf3 5. Qxf3 Bxf3 6. Rg1 Kf7 7.
g5 hxg5 8. hxg5 fxg5 9. Rxg5 Kf6 10.
Rg3 Rxf5 11. Ke3
Why won't crafty find/choose ... Rd5+ at ply 14 and 15 in Test 2 ?
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