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Subject: Re: Crafty 19.4 sees it!

Author: Slater Wold

Date: 07:41:37 11/13/03

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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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