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Subject: Re: Null move problem Ruffian solves in one second. How about your prog.?

Author: Mike Byrne

Date: 18:22:21 06/17/03

On June 17, 2003 at 15:45:20, Dann Corbit wrote:

>E:\programme\winboard\ruffian>ruffian -h 300M -T \m33.epd -t 999 -p 20
>Hash size 314572800
>Ruffian 1.0.1
>feature done=0
>Loading configuration: ruffian.cfg
>Warning: EGTB_HASH_SIZE changed, default=1048576, newvalue=8388608
>Logfile: Tue Jun 17 12:41:46 2003
>Total hash size 300M
>Initializing tablebases: /programme/winboard/nalimov
>Testing \m33.epd, 999 seconds, extra ply 20
>Testing: test 1   Solution: Kh6
>  1q1k4/2Rr4/8/2Q3K1/8/8/8/8 w - -
>  Depth   Time  Score    Best line
>   8/18   1.02    #33    Kh6 Rxc7 Qf8+ Kd7 Qxb8 Kd6 Kg5
>   8-->   1.59    #33    Kh6 Rxc7 Qf8+ Kd7 Qxb8 Kd6 Kg5
>
>
>Time: 1.59, cpu 37.74%, nodes 291341, nps 183233
>Hash: 128M, used 0%, hits 28%
>EGTB: probs 176, hits 176
>
>Best move: Kh6 (#33)  Solved (1/1)
>
>Summery: 1/1


Crafty 12.7 (1997)found it instantly -- 19.3

[d] 1q1k4/2Rr4/8/2Q3K1/8/8/8/8 w - - 0 1

Analysis by Crafty 12.7 (1997):

1.Kh6 Rxc7 2.Qf8+ Kd7 3.Qxb8
  +-  (6.04)   Depth: 4   00:00:00
1.Kh6 Qa8 2.Qf8+ Kxc7 3.Qxa8 Kd6
  +-  (4.78)   Depth: 5   00:00:00
1.Kh6 Qa8 2.Qf8+ Kxc7 3.Qxa8 Kd6
  +-  (4.78)   Depth: 5   00:00:00
1.Kh6 Qa8 2.Qf8+ Kxc7 3.Qxa8 Kd6 4.Kg6
  +-  (4.96)   Depth: 6   00:00:00  45kN
1.Kh6 Qa8 2.Qf8+ Kxc7 3.Qxa8 Kd6 4.Kg6
  +-  (4.96)   Depth: 6   00:00:00  91kN
1.Kh6 Rxc7 2.Qf8+ Kd7 3.Qxb8 Kc6 4.Qd8 Rf7
  +-  (5.10)   Depth: 7   00:00:00  126kN
1.Kh6 Rxc7 2.Qf8+ Kd7 3.Qxb8 Kc6 4.Qd8 Rf7
  +-  (5.10)   Depth: 7   00:00:00  227kN
1.Kh6 Rxc7 2.Qf8+ Kd7 3.Qxb8 Rc6+ 4.Kg5 Ke6 5.Qb3+ Ke5 6.Qb5+ Kd6
  +-  (5.07)   Depth: 8   00:00:00  250kN
1.Kh6 Rxc7 2.Qf8+ Kd7 3.Qxb8 Rc6+ 4.Kg5 Ke6 5.Qb3+ Ke5 6.Qb5+ Kd6
  +-  (5.07)   Depth: 8   00:00:01  562kN
1.Kh6 Rxc7 2.Qf8+ Kd7 3.Qxb8 Rc5 4.Qf8 Kc6 5.Qd8 Re5
  +-  (5.09)   Depth: 9   00:00:01  617kN
1.Kh6 Rxc7 2.Qf8+ Kd7 3.Qxb8 Rc5 4.Qf8 Kc6 5.Qd8 Re5
  +-  (5.09)   Depth: 9   00:00:02  1311kN
1.Kh6 Rxc7 2.Qf8+ Kd7 3.Qxb8 Rc5 4.Qf8 Kc6 5.Qd8 Rd5 6.Qe7
  +-  (5.15)   Depth: 10   00:00:02  1415kN
1.Kh6 Rxc7 2.Qf8+ Kd7 3.Qxb8 Rc5 4.Qf8 Kc6 5.Qd8 Rd5 6.Qe7
  +-  (5.15)   Depth: 10   00:00:04  2410kN
1.Kh6 Rxc7 2.Qf8+ Kd7 3.Qxb8 Rc5 4.Qf8 Re5 5.Kg7 Ke6 6.Qf7+ Kd6 7.Kf6 Re4
  +-  (5.12)   Depth: 11   00:00:04  2741kN

(Byrne, Secane, PA USA 17.06.2003)

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