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Subject: Re: Does any program except Brutus play this sacrifice?

Author: Mike Byrne

Date: 15:39:37 09/14/03

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On September 14, 2003 at 18:37:50, Mike Byrne wrote:

>Crafty 19.04 Se set to Morhpy (sacrificing Crafty with a 10% weight added to
>pawn values plays it quite readily)
>
>Black(1): kra morphy
>  queen value..........................950
>  rook value...........................500
>  bishop value.........................300
>  knight value.........................300
>  pawn value...........................110
>

I should add there also other changes to Crafty parameters to encourage
attacking the king besides the pawn change above.

>
>
>
>Black(1): go
>              clearing hash tables
>              time surplus   0.00  time limit 28.12 (3:30)/(25)
>              depth   time  score   variation (1)
>starting thread 1
>                1     0.00  -0.01   1. ... Qe7 2. Nxc5 bxc5
>                1->   0.02  -0.01   1. ... Qe7 2. Nxc5 bxc5
>                2     0.02   0.10   1. ... Qe7 2. Qe2
>                2->   0.02   0.10   1. ... Qe7 2. Qe2
>                3     0.03   0.21   1. ... Qe7 2. Nxc5 bxc5 3. Qe2
>                3     0.03     ++   1. ... Nd3!!
>                3     0.03  -0.50   1. ... Nd3 2. Nxc5 Re1+ 3. Qxe1 Nxe1
>                                    4. Rxe1 bxc5
>                3->   0.05  -0.50   1. ... Nd3 2. Nxc5 Re1+ 3. Qxe1 Nxe1
>                                    4. Rxe1 bxc5
>                4     0.05  -0.50   1. ... Nd3 2. Nxc5 Re1+ 3. Qxe1 Nxe1
>                                    4. Rxe1 bxc5
>                4->   0.06  -0.50   1. ... Nd3 2. Nxc5 Re1+ 3. Qxe1 Nxe1
>                                    4. Rxe1 bxc5 (s=4)
>                5     0.08  -0.50   1. ... Nd3 2. Nxc5 Re1+ 3. Qxe1 Nxe1
>                                    4. Rxe1 bxc5 (s=3)
>                5->   0.11  -0.50   1. ... Nd3 2. Nxc5 Re1+ 3. Qxe1 Nxe1
>                                    4. Rxe1 bxc5 (s=3)
>                6     0.12  -0.50   1. ... Nd3 2. Nxc5 Re1+ 3. Qxe1 Nxe1
>                                    4. Rxe1 bxc5 (s=2)
>                6     0.19     ++   1. ... Bxf2+!!
>                6     0.31  -1.07   1. ... Bxf2+ 2. Kxf2 Nfg4+ 3. Kg1 Qh6
>                                    4. Rc3 Qxh2+ 5. Kf1 h6 6. Qe2
>                6->   0.36  -1.07   1. ... Bxf2+ 2. Kxf2 Nfg4+ 3. Kg1 Qh6
>                                    4. Rc3 Qxh2+ 5. Kf1 h6 6. Qe2
>                7     0.48  -1.12   1. ... Bxf2+ 2. Kxf2 Nfg4+ 3. Kg1 Qh6
>                                    4. Rc3 Qxh2+ 5. Kf1 Kh8 6. Qe2 Kg8
>                7->   0.56  -1.12   1. ... Bxf2+ 2. Kxf2 Nfg4+ 3. Kg1 Qh6
>                                    4. Rc3 Qxh2+ 5. Kf1 Kh8 6. Qe2 Kg8
>                8     0.81  -1.00   1. ... Bxf2+ 2. Kxf2 Nfg4+ 3. Kg1 Qh6
>                                    4. Rc3 Qxh2+ 5. Kf1 Kh8 6. Qe2 Kg8
>                                    7. Nd4
>                8->   1.02  -1.00   1. ... Bxf2+ 2. Kxf2 Nfg4+ 3. Kg1 Qh6
>                                    4. Rc3 Qxh2+ 5. Kf1 Kh8 6. Qe2 Kg8
>                                    7. Nd4
>                9     1.55  -1.06   1. ... Bxf2+ 2. Kxf2 Nfg4+ 3. Kg1 Qh6
>                                    4. Rc3 Qxh2+ 5. Kf1 Qh5 6. Qd2 Nc4
>                                    7. Qd7 Nf6
>                9->   1.89  -1.06   1. ... Bxf2+ 2. Kxf2 Nfg4+ 3. Kg1 Qh6
>                                    4. Rc3 Qxh2+ 5. Kf1 Qh5 6. Qd2 Nc4
>                                    7. Qd7 Nf6
>               10     3.84  -1.21   1. ... Bxf2+ 2. Kxf2 Nfg4+ 3. Kg1 Qh6
>                                    4. Rc3 Qxh2+ 5. Kf1 Qh5 6. Qc2 Nc4
>                                    7. Bc1 Nh2+ 8. Kf2 Ne5
>               10->   4.64  -1.21   1. ... Bxf2+ 2. Kxf2 Nfg4+ 3. Kg1 Qh6
>                                    4. Rc3 Qxh2+ 5. Kf1 Qh5 6. Qc2 Nc4
>                                    7. Bc1 Nh2+ 8. Kf2 Ne5
>               11     8.66  -0.86   1. ... Bxf2+ 2. Kxf2 Nfg4+ 3. Kg1 Qh6
>                                    4. Rc3 Qxh2+ 5. Kf1 Qh5 6. Qd4 h6 7.
>                                    Nd2 Qh2 8. Nc4 h5 9. Nxe5 Rxe5
>               11->  15.81  -0.86   1. ... Bxf2+ 2. Kxf2 Nfg4+ 3. Kg1 Qh6
>                                    4. Rc3 Qxh2+ 5. Kf1 Qh5 6. Qd4 h6 7.
>                                    Nd2 Qh2 8. Nc4 h5 9. Nxe5 Rxe5
>              time=28.34  cpu=164%  mat=0  n=30699637  fh=95%  nps=1083k
>              ext-> chk=2085346 cap=59017 pp=16084 1rep=115327 mate=15376
>              predicted=0  nodes=30699637  evals=4315716
>              endgame tablebase-> probes=0  hits=0
>              SMP->  split=744  stop=64  data=8/64  cpu=46.75  elap=28.34
>
>Black(1): Bxf2+
>              time used:  28.36
>White(2):



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