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Subject: Re: Windmill tactical Positions are too easy for chess programs

Author: Mike Byrne

Date: 08:46:28 05/09/04

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>
>
>                 HERE IS ANOTHER WINDMILL TACTICAL POSITION
>
>Here is a simply example, in which White is heavily behind on material, but sees
>a chance to set up a windmill, and invests his Queen!
>
>
>New game,
>[D]3n3r/2p3k1/1pbbpRpp/6r1/3P4/2PBQ2P/q5P1/5RK1 w - - 0 1
>
Crafty v19.12 SE [Kasparov] (2 cpus)
SE code enabled


White(1): go
              time surplus   0.00  time limit 10:00 (10:00)
              time surplus   0.00  time limit 10:00 (10:00)
              depth   time  score   variation (1)
                1     0.00  -6.01   1. Be4
                1->   0.00  -6.01   1. Be4
                2     0.00     -1   1. Be4
                2     0.00  -6.77   1. Be4 Rxg2+ 2. Bxg2 Qxg2#
                2->   0.01  -6.77   1. Be4 Rxg2+ 2. Bxg2 Qxg2#
                3     0.01     -1   1. Be4
                3     0.01  -9.82   1. Be4 Qxg2+ 2. Bxg2 Rxg2+ 3. Kh1 Re2+
                                    4. Qf3 Bxf3+ 5. R6xf3
                3     0.03  -8.46   1. Qxg5 hxg5 2. Be2 Kh7 3. Rxe6+ Kg7
                3->   0.03  -8.46   1. Qxg5 hxg5 2. Rxg6+ Kh7 3. Rxe6+
                                    Kg7 (s=3)
                4     0.04     +1   1. Qxg5!!
                4     0.04     +3   1. Qxg5!!
                4     0.04     +M   1. Qxg5!!
                4     0.04  -4.88   1. Qxg5 Bh2+ 2. Kxh2 hxg5 3. Rxg6+
                                    Kh7 4. Rxe6+ Kg7 (s=2)
                4->   0.06  -4.88   1. Qxg5 Bh2+ 2. Kxh2 hxg5 3. Rxg6+
                                    Kh7 4. Rxe6+ Kg7
                5     0.06     +1   1. Qxg5!!
                5     0.07     +3   1. Qxg5!!
                5     0.07  -2.57   1. Qxg5 Bh2+ 2. Kxh2 hxg5 3. Rxg6+
                                    Kh7 4. Rxe6+ Be4 5. Re7+ Nf7 6. Rfxf7+
                5->   0.09  -2.57   1. Qxg5 Bh2+ 2. Kxh2 hxg5 3. Rxg6+
                                    Kh7 4. Rxe6+ Be4 5. Re7+ Nf7 6. Rfxf7+
                6     0.11     +1   1. Qxg5!!
                6     0.11     +3   1. Qxg5!!
                6     0.12   0.00   1. Qxg5 hxg5 2. Rxg6+ Kh7 3. Rxe6+
                                    Kg7 4. Rg6+ Kh7 5. Re6+
                6->   0.15   0.00   1. Qxg5 hxg5 2. Rxg6+ Kh7 3. Rxe6+
                                    Kg7 4. Rg6+ Kh7 5. Re6+
                7     0.17   0.00   1. Qxg5 hxg5 2. Rxg6+ Kh7 3. Rxe6+
                                    Kg7 4. Rg6+ Kh7 5. Re6+
                7->   0.20   0.00   1. Qxg5 hxg5 2. Rxg6+ Kh7 3. Rxe6+
                                    Kg7 4. Rg6+ Kh7 5. Re6+
                8     0.25   0.00   1. Qxg5 hxg5 2. Rxg6+ Kh7 3. Rxe6+
                                    Kg7 4. Rg6+ Kh7 5. Re6+
                8->   0.29   0.00   1. Qxg5 hxg5 2. Rxg6+ Kh7 3. Rxe6+
                                    Kg7 4. Rg6+ Kh7 5. Re6+
                9     0.43     +1   1. Qxg5!!
                9     0.59     +3   1. Qxg5!!
                9     0.78     +M   1. Qxg5!!
                9     1.70   9.99   1. Qxg5 hxg5 2. Rxg6+ Kh7 3. Rxe6+
                                    Kg7 4. Rg6+ Kh7 5. Rxd6+ Kg7 6. Rg6+
                                    Kh7 7. Rxc6+ Kg7 8. Rg6+ Kh7 9. Rxb6+
                                    Kg7 10. Rg6+ Kh7 11. Ra6+ Kg7 12. Rxa2
                9->   1.75   9.99   1. Qxg5 hxg5 2. Rxg6+ Kh7 3. Rxe6+
                                    Kg7 4. Rg6+ Kh7 5. Rxd6+ Kg7 6. Rg6+
                                    Kh7 7. Rxc6+ Kg7 8. Rg6+ Kh7 9. Rxb6+
                                    Kg7 10. Rg6+ Kh7 11. Ra6+ Kg7 12. Rxa2
               10     2.61   9.65   1. Qxg5 Bh2+ 2. Kxh2 hxg5 3. Rxg6+
                                    Kh7 4. Rxe6+ Kg7 5. Rg6+ Kh7 6. Rxc6+
                                    Kg7 7. Rg6+ Kh7 8. Rxb6+ Kg7 9. Rg6+
                                    Kh7 10. Ra6+ Kg7 11. Rxa2 g4
               10->   2.78   9.65   1. Qxg5 Bh2+ 2. Kxh2 hxg5 3. Rxg6+
                                    Kh7 4. Rxe6+ Kg7 5. Rg6+ Kh7 6. Rxc6+
                                    Kg7 7. Rg6+ Kh7 8. Rxb6+ Kg7 9. Rg6+
                                    Kh7 10. Ra6+ Kg7 11. Rxa2 g4
               11     4.09   9.99   1. Qxg5 Bh2+ 2. Kxh2 hxg5 3. Rxg6+
                                    Kh7 4. Rxe6+ Kg7 5. Rg6+ Kh7 6. Rxc6+
                                    Kg7 7. Rg6+ Kh7 8. Rxb6+ Kg7 9. Rg6+
                                    Kh7 10. Ra6+ Kg7 11. Rxa2 g4 12. Raf2
               11->   4.65   9.99   1. Qxg5 Bh2+ 2. Kxh2 hxg5 3. Rxg6+
                                    Kh7 4. Rxe6+ Kg7 5. Rg6+ Kh7 6. Rxc6+
                                    Kg7 7. Rg6+ Kh7 8. Rxb6+ Kg7 9. Rg6+
                                    Kh7 10. Ra6+ Kg7 11. Rxa2 g4 12. Raf2
               12     7.29   9.89   1. Qxg5 Bh2+ 2. Kxh2 hxg5 3. Rxg6+
                                    Kh7 4. Rxe6+ Kg7 5. Rg6+ Kh7 6. Rxc6+
                                    Kg7 7. Rg6+ Kh7 8. Rxb6+ Kg7 9. Rg6+
                                    Kh7 10. Ra6+ Kg7 11. Rxa2 g4 12. Kg3
                                    gxh3 13. gxh3
               12->   8.28   9.89   1. Qxg5 Bh2+ 2. Kxh2 hxg5 3. Rxg6+
                                    Kh7 4. Rxe6+ Kg7 5. Rg6+ Kh7 6. Rxc6+
                                    Kg7 7. Rg6+ Kh7 8. Rxb6+ Kg7 9. Rg6+
                                    Kh7 10. Ra6+ Kg7 11. Rxa2 g4 12. Kg3
                                    gxh3 13. gxh3
               13    14.28   9.99   1. Qxg5 Bh2+ 2. Kxh2 hxg5 3. Rxg6+
                                    Kh7 4. Rxe6+ Kg7 5. Rg6+ Kh7 6. Rxc6+
                                    Kg7 7. Rg6+ Kh7 8. Rxb6+ Kg7 9. Rg6+
                                    Kh7 10. Ra6+ Kg7 11. Rxa2 g4 12. Ra7
                                    Ne6 13. Kg3
               13->  16.59   9.99   1. Qxg5 Bh2+ 2. Kxh2 hxg5 3. Rxg6+
                                    Kh7 4. Rxe6+ Kg7 5. Rg6+ Kh7 6. Rxc6+
                                    Kg7 7. Rg6+ Kh7 8. Rxb6+ Kg7 9. Rg6+
                                    Kh7 10. Ra6+ Kg7 11. Rxa2 g4 12. Ra7
                                    Ne6 13. Kg3
               14    37.00  10.09   1. Qxg5 hxg5 2. Rxg6+ Kh7 3. Rxe6+
                                    Kg7 4. Rg6+ Kh7 5. Rxd6+ Be4 6. Bxe4+
                                    Kg7 7. Rg6+ Kh7 8. Rxb6+ Kg7 9. Rg6+
                                    Kh7 10. Ra6+ Kg7 11. Rxa2 Re8 12. Re2
                                    Nc6 13. Kf2 Rf8+ 14. Ke1
               14->  41.54  10.09   1. Qxg5 hxg5 2. Rxg6+ Kh7 3. Rxe6+
                                    Kg7 4. Rg6+ Kh7 5. Rxd6+ Be4 6. Bxe4+
                                    Kg7 7. Rg6+ Kh7 8. Rxb6+ Kg7 9. Rg6+
                                    Kh7 10. Ra6+ Kg7 11. Rxa2 Re8 12. Re2
                                    Nc6 13. Kf2 Rf8+ 14. Ke1
?              15    45.01   1/44*  1. Qxg5
White(1): ?
              time=55.34  cpu=183%  mat=-7  n=77772638  fh=94%  nps=1.41M
              ext-> chk=5326633 cap=102408 pp=207095 1rep=579820 mate=47681
              predicted=0  nodes=77772638  evals=8824311  50move=0
              endgame tablebase-> probes=0  hits=0
              SMP->  split=1322  stop=95  data=6/128  cpu=1:41  elap=55.34

White(1): Qxg5
              time used:  55.34
Black(1):



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