Author: Mike Byrne
Date: 11:17:14 05/09/04
Go up one level in this thread
On May 09, 2004 at 14:00:03, Robert Hyatt wrote:
>On May 09, 2004 at 12:29:06, GuyHaworth wrote:
>
>>
>>... last one I think :-)
>>
>>Do you have a DTM for 2N5/5R2/8/7b/8/2k5/8/1K2n3 b
>>
>>DTZ = 1 (but then DTZ > 50): DTZ50 = 6 ... a nice quadrille of B & N.
>>
>>From Marc B, the SZ50+ v SZ50- line is:
>>
>>1. ... Bg6 2. Ka1 Nc2+ 3. Kb1 Nb4+ Kc1 4. Kc1 Nd3+ 5. Kd1 Bh5+ 6. Rf3 Bxf3#
>>
>>Alternative K moves allow Bxf7 before move 6.
>>
>>g
>
>1. ... Bg6+! 2. Ka1! Nc2+! 3. Ka2! Bxf7+! 4. Kb1 Nb4! 5. Nd6! Bg6+!
>6. Kc1! Nd3+! 7. Kb1! Kb3! 8. Nc8! Be4 9. Nd6! Bh7! 10. Ne8! Bg6!
>11. Nf6! Kc3! 12. Ka2! Nb4+! 13. Ka1! Bf5 14. Ne4+! Kb3! 15. Ng3!
>Bd3! 16. Nh5! Kc2! 17. Nf4! Ba6! 18. Ne6 Nc6 19. Ng7 Nd4! 20. Ka2!
>Nb5 21. Nf5! Bc8! 22. Ne3+! Kd3! 23. Ng2! Bb7! 24. Nf4+! Kc2! 25.
>Ne6 Be4! 26. Ka1! Kc3! 27. Nc5! Bc2 28. Nd7! Bf5! 29. Ne5! Na3 30.
>Ka2! Nc2! 31. Nf3! Be6+! 32. Kb1 Na3+ 33. Kc1! Nc4! 34. Nh2! Nb2!
>35. Nf1! Nd3+! 36. Kb1! Nc5! 37. Kc1! Bg4! 38. Ne3! Nb3+! 39. Kb1
>Bf3! 40. Nf1! Kd3! 41. Ng3 Nd2+! 42. Kb2! Nc4+! 43. Kb3! Nd6! 44.
>Kb4! Kd4! 45. Ka5 Ke3! 46. Nf1+! Ke2! 47. Nh2! Bh5! 48. Kb6 Nf7 49.
>Kc6 Kf2! 50. Kd5! Kg1 51. Ke4! Kxh2! 52. Kf4! Bd1 53. Kf5 Kg3! 54.
>Ke4! Bf3+! 55. Kd4 Kf4! 56. Kc5 Ke3 57. Kc4 Ng5 58. Kc5 Kd3! 59.
>Kd6! Kd4! 60. Ke7! Ke5! 61. Kf8! Kf6! 62. Kg8! Nf7 63. Kf8 Nh6 64.
>Ke8 Nf5 65. Kf8 Ne7 66. Ke8 Ng6 67. Kd8 Ne5 68. Ke8 Bd5! 69. Kf8!
>Ng6+ 70. Ke8 Bc6+ 71. Kd8 Ke6! 72. Kc7! Ne5! 73. Kc8 Kd6! 74. Kd8!
>Nd3 75. Kc8 Nc5! 76. Kd8! Ba4 77. Kc8 Bd7+! 78. Kb8! Kc6! 79. Ka7!
>Kc7! 80. Ka8 Kb6! 81. Kb8 Na6+! 82. Ka8 Bc6#
==========================================================================
I was suprised tha even with 5 man EGTB (not 6) Crafty finds the mate in 82
instantly.
Black(1): [d]2N5/5R2/8/7b/8/2k5/8/1K2n3 b
Black(1): go
end-game phase
clearing hash tables
time surplus 29.84 time limit 166:39 (166:39)
depth time score variation (1)
4-> 0.00 -Mat83 1. ... Bxf7 <EGTB>
5 0.00 -Mat83 1. ... Bxf7 <EGTB>
5-> 0.00 -Mat83 1. ... Bxf7 <EGTB>
6 0.00 -Mat83 1. ... Bxf7 <EGTB>
6-> 0.02 -Mat83 1. ... Bxf7 <EGTB>
7 0.02 -Mat83 1. ... Bxf7 <EGTB>
7-> 0.03 -Mat83 1. ... Bxf7 <EGTB>
8 0.03 -Mat83 1. ... Bxf7 <EGTB>
8 0.05 -Mat82 1. ... Bg6+ 2. Ka1 Nc2+ 3. Ka2 Bxf7+
<EGTB>
8-> 0.05 -Mat82 1. ... Bg6+ 2. Ka1 Nc2+ 3. Ka2 Bxf7+
<EGTB>
9 0.09 -Mat82 1. ... Bg6+ 2. Ka1 Nc2+ 3. Ka2 Bxf7+
<EGTB>
9-> 0.11 -Mat82 1. ... Bg6+ 2. Ka1 Nc2+ 3. Ka2 Bxf7+
<EGTB> (s=2)
10 0.13 -Mat82 1. ... Bg6+ 2. Ka1 Nc2+ 3. Ka2 Bxf7+
<EGTB>
10-> 0.14 -Mat82 1. ... Bg6+ 2. Ka1 Nc2+ 3. Ka2 Bxf7+
<EGTB> (s=2)
11 0.19 -Mat82 1. ... Bg6+ 2. Ka1 Nc2+ 3. Ka2 Bxf7+
<EGTB>
11-> 0.20 -Mat82 1. ... Bg6+ 2. Ka1 Nc2+ 3. Ka2 Bxf7+
<EGTB> (s=2)
12 0.25 -Mat82 1. ... Bg6+ 2. Ka1 Nc2+ 3. Ka2 Bxf7+
<EGTB>
12-> 0.30 -Mat82 1. ... Bg6+ 2. Ka1 Nc2+ 3. Ka2 Bxf7+
<EGTB> (s=2)
13 0.39 -Mat82 1. ... Bg6+ 2. Ka1 Nc2+ 3. Ka2 Bxf7+
<EGTB>
13-> 0.47 -Mat82 1. ... Bg6+ 2. Ka1 Nc2+ 3. Ka2 Bxf7+
<EGTB> (s=2)
14 0.59 -Mat82 1. ... Bg6+ 2. Ka1 Nc2+ 3. Ka2 Bxf7+
<EGTB>
14-> 0.73 -Mat82 1. ... Bg6+ 2. Ka1 Nc2+ 3. Ka2 Bxf7+
<EGTB> (s=2)
15 1.05 -Mat82 1. ... Bg6+ 2. Ka1 Nc2+ 3. Ka2 Bxf7+
<EGTB>
15-> 1.27 -Mat82 1. ... Bg6+ 2. Ka1 Nc2+ 3. Ka2 Bxf7+
<EGTB> (s=2)
16 1.67 -Mat82 1. ... Bg6+ 2. Ka1 Nc2+ 3. Ka2 Bxf7+
<EGTB>
? 16 1.67 2/16* 1. ... Nd3
Black(0): ?
time=2.00 cpu=138% mat=2 n=2106423 fh=99% nps=1.05M
ext-> chk=92320 cap=92 pp=0 1rep=1780 mate=179
predicted=1 nodes=2106423 evals=1 50move=0
endgame tablebase-> probes=9943 hits=9943
SMP-> split=442 stop=1 data=4/128 cpu=2.77 elap=2.00
mate in 82 moves.
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