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Subject: Re: Crafty 19.4 sees it!

Author: Andy Prap

Date: 08:44:39 11/14/03

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On November 13, 2003 at 10:41:37, Slater Wold wrote:

>On November 12, 2003 at 23:56:50, Dan Sicerly wrote:
>
>>[D]r1b1k2r/pp1nqppp/8/2Pp4/1B1Nn1P1/4P3/PPQ1B2P/2K2RR1 b kq - 0 17
>>
>>
>>
>>In this position Fritz decides to castle, which leaves it an exchange down, but
>>with a solid position, Seirwan said this was a human like decision and clearly
>>demonstrated Advanced chess thinking, how many programs Choose this move, my
>>Fritz8 doesn't choose the move after 5 minutes on XP2400
>
>It takes Crafty 19.4, 227:24 to see it.  On Fritz's HW, it would have taken ~60
>minutes.
>
>              clearing hash tables
>              time surplus   0.00  time limit 720:00 (720:00)
>              depth   time  score   variation (1)
>                1     0.00  -0.57   1. ... Ndxc5
>                1->   0.00  -0.57   1. ... Ndxc5
>                2     0.00     --   1. ... Ndxc5
>                2     0.00   0.71   1. ... Ndxc5 2. Bb5+ Kf8
>                2     0.00   0.26   1. ... Nexc5 2. Kb1
>                2->   0.01   0.26   1. ... Nexc5 2. Kb1
>                3     0.01   0.26   1. ... Nexc5 2. Nf5 Qf8
>                3->   0.01   0.26   1. ... Nexc5 2. Nf5 Qf8
>                4     0.01     --   1. ... Nexc5
>                4     0.01   1.10   1. ... Nexc5 2. Nf5 Nd3+ 3. Qxd3 Qxb4
>                                    4. Nxg7+
>                4     0.05   0.60   1. ... Ndxc5 2. Bb5+ Kf8 3. Kb1 Qc7
>                4->   0.05   0.60   1. ... Ndxc5 2. Bb5+ Kf8 3. Kb1 Qc7
>                5     0.06   0.89   1. ... Ndxc5 2. Bb5+ Kf8 3. Kb1 Qc7
>                                    4. Qd3
>                5     0.08   0.62   1. ... a5 2. Nf5 Qe5 3. Ba3 O-O
>                5->   0.09   0.62   1. ... a5 2. Nf5 Qe5 3. Ba3 O-O
>                6     0.12   0.94   1. ... a5 2. Nf5 Qe5 3. Bc3 Nxc3 4.
>                                    Nd6+ Kd8 5. Qxc3 Qxc3+ 6. bxc3
>                6     0.20   0.85   1. ... Ndxc5 2. Bb5+ Kf8 3. Nb3 a6
>                                    4. Bxa6 Nd3+ 5. Bxd3 Qxb4 6. Bxe4 dxe4
>                6->   0.25   0.85   1. ... Ndxc5 2. Bb5+ Kf8 3. Nb3 a6
>                                    4. Bxa6 Nd3+ 5. Bxd3 Qxb4 6. Bxe4 dxe4
>                7     0.50   0.98   1. ... Ndxc5 2. Bb5+ Bd7 3. Bxc5 Nxc5
>                                    4. Nf5 Qf8 5. Nxg7+ Qxg7 6. Qxc5 Bxb5
>                                    7. Qxb5+
>                7     0.87   0.82   1. ... g6 2. Bb5 a5 3. Ba3 O-O 4. c6
>                                    Ndc5
>                7->   0.94   0.82   1. ... g6 2. Bb5 a5 3. Ba3 O-O 4. c6
>                                    Ndc5
>                8     1.67   0.75   1. ... g6 2. Bb5 O-O 3. c6 Ndc5 4.
>                                    Kb1 a5 5. Bxc5 Qxc5 6. Qxc5 Nxc5
>                8->   1.92   0.75   1. ... g6 2. Bb5 O-O 3. c6 Ndc5 4.
>                                    Kb1 a5 5. Bxc5 Qxc5 6. Qxc5 Nxc5
>                9     2.37     --   1. ... g6
>                9     3.81   1.30   1. ... g6 2. Bb5 a5 3. Ba3 Qg5 4. Qe2
>                                    O-O 5. c6 Ndc5
>                9->   8.00   1.30   1. ... g6 2. Bb5 a5 3. Ba3 Qg5 4. Qe2
>                                    O-O 5. c6 Ndc5
>               10    15.94   0.99   1. ... g6 2. Bf3 a5 3. Ba3 Nexc5 4.
>                                    Qc3 Ne5 5. Bxc5 Qxc5 6. Qxc5 Nd3+ 7.
>                                    Kb1 Nxc5 8. Bxd5
>               10->  19.00   0.99   1. ... g6 2. Bf3 a5 3. Ba3 Nexc5 4.
>                                    Qc3 Ne5 5. Bxc5 Qxc5 6. Qxc5 Nd3+ 7.
>                                    Kb1 Nxc5 8. Bxd5
>               11    39.95   1.14   1. ... g6 2. Nb5 Ndxc5 3. Bf3 a5 4.
>                                    Ba3 Qd7 5. Bxe4 Qxb5 6. Qc3 O-O 7.
>                                    Bxc5 dxe4 8. Bxf8 Kxf8
>               11->  51.98   1.14   1. ... g6 2. Nb5 Ndxc5 3. Bf3 a5 4.
>                                    Ba3 Qd7 5. Bxe4 Qxb5 6. Qc3 O-O 7.
>                                    Bxc5 dxe4 8. Bxf8 Kxf8
>               12     2:22   1.25   1. ... g6 2. Nb3 O-O 3. Ba3 Rd8 4.
>                                    c6 Qg5 5. cxd7 Qxe3+ 6. Kb1 Bxd7 7.
>                                    Qd3 Qxd3+ 8. Bxd3 Rac8 9. g5
>               12->   3:06   1.25   1. ... g6 2. Nb3 O-O 3. Ba3 Rd8 4.
>                                    c6 Qg5 5. cxd7 Qxe3+ 6. Kb1 Bxd7 7.
>                                    Qd3 Qxd3+ 8. Bxd3 Rac8 9. g5
>               13     6:41   1.12   1. ... g6 2. Bf3 a5 3. Ba3 Nexc5 4.
>                                    Kb1 Qd6 5. Nb5 Qb6 6. Bxd5 Qxb5 7.
>                                    Bxf7+ Kd8 8. Rd1
>               13->   8:16   1.12   1. ... g6 2. Bf3 a5 3. Ba3 Nexc5 4.
>                                    Kb1 Qd6 5. Nb5 Qb6 6. Bxd5 Qxb5 7.
>                                    Bxf7+ Kd8 8. Rd1
>               14    17:28   1.28   1. ... g6 2. Nb5 Ndxc5 3. Bf3 a5 4.
>                                    Ba3 Qd7 5. Bxe4 Qxb5 6. Bxc5 dxe4 7.
>                                    Qc3 f6 8. Rxf6
>               14->  31:52   1.28   1. ... g6 2. Nb5 Ndxc5 3. Bf3 a5 4.
>                                    Ba3 Qd7 5. Bxe4 Qxb5 6. Bxc5 dxe4 7.
>                                    Qc3 f6 8. Rxf6
>               15    61:28     --   1. ... g6
>               15    75:05   1.71   1. ... g6 2. Bf3 a5 3. Ba3 Nexc5 4.
>                                    Bxd5 Qxe3+ 5. Kb1 Qxd4 6. Bxf7+ Ke7
>                                    7. Rd1 Qxd1+ 8. Qxd1 Kxf7 9. Qd4 Re8
>                                    10. Bxc5 Nxc5 11. Qxc5
>               15   177:55   1.68   1. ... Ne5 2. Bb5+ Bd7 3. c6 Qxb4 4.
>                                    cxd7+ Ke7 5. Rf4 Qc5 6. Nf5+ Kd8 7.
>                                    Qxc5 Nxc5 8. Rd1 a6 9. Be2 Ncxd7 10.
>                                    Nxg7 Rc8+ 11. Kb1
>               15   227:24   1.50   1. ... O-O 2. Nf5 Qe5 3. c6 bxc6 4.
>                                    Bxf8 Kxf8 5. Qxc6 Rb8 6. Qc2 Ndc5 7.
>                                    Ng3 Kg8 8. Nxe4 Nxe4 9. Kb1 Qxh2
>               15-> 236:42   1.50   1. ... O-O 2. Nf5 Qe5 3. c6 bxc6 4.
>                                    Bxf8 Kxf8 5. Qxc6 Rb8 6. Qc2 Ndc5 7.
>                                    Ng3 Kg8 8. Nxe4 Nxe4 9. Kb1 Qxh2
>               16   259:25   1.48   1. ... O-O 2. Nf5 Qe5 3. c6 bxc6 4.
>                                    Bxf8 Kxf8 5. g5 Nb6 6. Nd4 c5 7. Nc6
>                                    Qd6 8. g6 hxg6 9. Bb5
>               16-> 310:05   1.48   1. ... O-O 2. Nf5 Qe5 3. c6 bxc6 4.
>                                    Bxf8 Kxf8 5. g5 Nb6 6. Nd4 c5 7. Nc6
>                                    Qd6 8. g6 hxg6 9. Bb5
>               17   373:00   1.48   1. ... O-O 2. Nf5 Qe5 3. c6 bxc6 4.
>                                    Bxf8 Kxf8 5. Ng3 Ndc5 6. Nxe4 Nxe4
>                                    7. Qxc6 Rb8 8. Qc2 Kg8 9. Bd3 Nf6 10.
>                                    Qe2 Nxg4 11. Rxg4 Bxg4 12. Qxg4 Rxb2
>               17-> 528:34   1.48   1. ... O-O 2. Nf5 Qe5 3. c6 bxc6 4.
>                                    Bxf8 Kxf8 5. Ng3 Ndc5 6. Nxe4 Nxe4
>                                    7. Qxc6 Rb8 8. Qc2 Kg8 9. Bd3 Nf6 10.
>                                    Qe2 Nxg4 11. Rxg4 Bxg4 12. Qxg4 Rxb2


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