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Subject: Re: Can your (amateur) prog solve this?

Author: James Robertson

Date: 10:18:00 02/18/99

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On February 18, 1999 at 08:12:40, Robert Hyatt wrote:

>On February 18, 1999 at 00:50:41, Will Singleton wrote:
>
>>
>>Here's a position that occurred between Amateur and Fortress on fics.  Amateur,
>>as white, played dxe5, which seems to lose.  It would be interesting to see if
>>any of the amateur programs out there will avoid playing dxe5.
>>
>>1r1qr1k1/1pp3p1/5p1p/p2ppb2/2nPnB2/PQP2NP1/2P1PPBP/3R1RK1 w - -
>>
>>
>>Will
>
>
>maybe you have a bug? Crafty fails low on this very quickly:

Well.... than my program has a bug too!

James

>              clearing hash tables
>              time surplus   0.00  time limit 166:39 (166:39)
>              depth   time  score   variation (1)
>                5     0.18  -0.31   1. Bc1 b5 2. dxe5 fxe5 3. Nh4 a4
>                5->   0.32  -0.31   1. Bc1 b5 2. dxe5 fxe5 3. Nh4 a4
>                6     0.80  -0.28   1. Bc1 Qd7 2. dxe5 Nc5 3. Qa2 fxe5
>                6     1.15  -0.25   1. dxe5 fxe5 2. Bc1 g5 3. Nd2 Nexd2
>                                    4. Bxd2 Qd6 <HT>
>                6->   1.31  -0.25   1. dxe5 fxe5 2. Bc1 g5 3. Nd2 Nexd2
>                                    4. Bxd2 Qd6 <HT>
>                7     2.58  -0.22   1. dxe5 a4 2. Qb4 fxe5 3. Bc1 Qd7 4.
>                                    Rfe1
>                7->   3.20  -0.22   1. dxe5 a4 2. Qb4 fxe5 3. Bc1 Qd7 4.
>                                    Rfe1
>                8     3.50     --   1. dxe5
>                8     4.85  -0.72   1. dxe5 a4 2. Qxc4 dxc4 3. Rxd8 Rbxd8
>                                    4. exf6 Nxc3 5. fxg7 Bxc2
>                8     8.10  -0.34   1. Bc1 Re6 2. Rd3 Qd7 3. Qa2 Ned6 4.
>                                    Rdd1 exd4 5. Nxd4
>                8->   9.42  -0.34   1. Bc1 Re6 2. Rd3 Qd7 3. Qa2 Ned6 4.
>                                    Rdd1 exd4 5. Nxd4
>                9    12.97  -0.35   1. Bc1 Re6 2. Rd3 Qd7 3. Qa2 Ned6 4.
>                                    Rdd1 e4 5. Nh4
>                9->  19.07  -0.35   1. Bc1 Re6 2. Rd3 Qd7 3. Qa2 Ned6 4.
>                                    Rdd1 e4 5. Nh4
>               10    34.38  -0.41   1. Bc1 Re6 2. Rd3 Nxg3 3. fxg3 e4 4.
>                                    Rdd1 exf3 5. exf3 Re2
>               10->  44.99  -0.41   1. Bc1 Re6 2. Rd3 Nxg3 3. fxg3 e4 4.
>                                    Rdd1 exf3 5. exf3 Re2
>               11     1:15     --   1. Bc1
>               11     1:24  -1.17   1. Bc1 a4 2. Qb4 Re6 3. Nh4 Rb6 4.
>                                    Nxf5 Rxb4 5. cxb4 Qd7 6. Ne3
>
>this run on my PII/300 notebook.  It never seems to consider de after those
>early plies, even after failing low on Bc1 at depth=11 and changing to Be3...



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