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Subject: Re: 010 - mate in 20 moves!

Author: Yuriy Lyapko

Date: 05:17:56 09/04/02

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On September 04, 2002 at 02:34:48, Eduard Nemeth wrote:

>[D]B2k4/KPpP4/n1Pb4/P5p1/5p2/5P2/8/8 b - - 0 1
>
>Which program see a mate in 20 moves?
>
>Eduard

OTOH, this one is very easy for chess programs.
My Bestia here on AMD K6-2/450MHz with 32Mb hash needs only 14 sec to find the
mate in 20.

  2  -353         2        344 g5g4 a7a6
  3  -345         2        480 a6b8 a7b8 d8e7
  4  -370         2        939 a6b8 a7b8
  4  -528         3       1388 a6b8 a7b8 g5g4 a5a6
  5  -528         3       1481 a6b8 a7b8 g5g4 a5a6 g4f3
  5  -528         4       1678 a6b8 a7b8 g5g4 a5a6 g4f3
  6  -503         4       1793 a6b8
  6  -503         4       1793 a6b8
  6  -203         4       1804 a6b8
  6  -203         5       1804 a6b8
  6     0         5       2134 a6b8 a7b8 d6c5 a5a6 c5f2 a6a7 f2h4
  6     0         6       3153 a6b8 a7b8 d6c5 a5a6 c5f2 a6a7 f2h4
  7     0         6       3496 a6b8 a7b8 d6c5
  7     0         7       3911 a6b8 a7b8 d6c5
  8     0         8       6438 a6b8 a7b8 d6c5 a5a6 c5f2 a6a7 f2h4
  8     0        11      10943 a6b8 a7b8 d6c5 a5a6 c5f2 a6a7 f2h4
  9     0        11      11788 a6b8 a7b8 d6c5
  9     0        12      12402 a6b8 a7b8 d6c5
 10    25        15      16834 a6b8
 10    25        15      16834 a6b8
 10   325        16      18376 a6b8
 10   325        16      18376 a6b8
 10   377        21      23504 a6b8 a7b8 d6c5 a5a6 c5d4 a6a7 g5g4 f3g4 f4f3 g4g5
f3f2 g5g6 f2f1Q g6g7 d4a7 b8a7 f1a1 a7b8 a1g7 b8a7 g7a1 a7b8 a1e1
 10   377        27      37384 a6b8 a7b8 d6c5 a5a6 c5d4 a6a7 g5g4 f3g4 f4f3 g4g5
f3f2 g5g6 f2f1Q g6g7 d4a7 b8a7 f1a1 a7b8 a1g7 b8a7 g7a1 a7b8 a1e1
 11   377        29      39742 a6b8 a7b8 d6c5
 11   377        30      42083 a6b8 a7b8 d6c5
 12   402        31      42443 a6b8
 12   402        31      42443 a6b8
 12   508        53      82905 a6b8 a7b8 d6c5 a5a6 c5d4 a6a7 g5g4 f3g4 f4f3 g4g5
f3f2 g5g6 f2f1Q g6g7 d4a7 b8a7 f1a1 a7b8 a1g7 b8a7 g7a1 a7b8 a1e1 b8a7 e1a5 a7b8
a5b4 b8a7 b4a4 a7b8
 12   508        69     120932 a6b8 a7b8 d6c5 a5a6 c5d4 a6a7 g5g4 f3g4 f4f3 g4g5
f3f2 g5g6 f2f1Q g6g7 d4a7 b8a7 f1a1 a7b8 a1g7 b8a7 g7a1 a7b8 a1e1 b8a7 e1a5 a7b8
a5b4 b8a7 b4a4 a7b8
 13   508        73     128025 a6b8 a7b8 d6c5
 13   508        76     134113 a6b8 a7b8 d6c5
 14   533        76     134267 a6b8
 14   533        76     134267 a6b8
 14   674       136     242491 a6b8 a7b8 d6c5 a5a6 c5d4 a6a7 g5g4 f3g4 f4f3 g4g5
f3f2 g5g6 f2f1Q g6g7 d4a7 b8a7 f1a1 a7b8 a1g7 b8a7 g7a1 a7b8 a1e1 b8a7 e1a5 a7b8
a5b4 b8a7 b4a4 a7b8
 14   674       196     390273 a6b8 a7b8 d6c5 a5a6 c5d4 a6a7 g5g4 f3g4 f4f3 g4g5
f3f2 g5g6 f2f1Q g6g7 d4a7 b8a7 f1a1 a7b8 a1g7 b8a7 g7a1 a7b8 a1e1 b8a7 e1a5 a7b8
a5b4 b8a7 b4a4 a7b8
 15   674       208     413860 a6b8 a7b8 d6c5
 15   674       212     423071 a6b8 a7b8 d6c5
 16   685       359     732805 a6b8 a7b8 d6c5 a5a6 c5d4 a6a7 g5g4 f3g4 f4f3 g4g5
f3f2 g5g6 f2f1Q g6g7 d4a7 b8a7 f1a1 a7b8 a1g7 b8a7 g7a1 a7b8 a1e1 b8a7 e1a5 a7b8
a5b4 b8a7 b4a4 a7b8
 16   685       552    1183671 a6b8 a7b8 d6c5 a5a6 c5d4 a6a7 g5g4 f3g4 f4f3 g4g5
f3f2 g5g6 f2f1Q g6g7 d4a7 b8a7 f1a1 a7b8 a1g7 b8a7 g7a1 a7b8 a1e1 b8a7 e1a5 a7b8
a5b4 b8a7 b4a4 a7b8
 17   685       582    1250575 a6b8 a7b8 d6c5
 17   685       597    1287827 a6b8 a7b8 d6c5
 18   710       601    1293654 a6b8
 18   710       601    1293654 a6b8
 18  1010       601    1293709 a6b8
 18  1010       602    1293709 a6b8
 18  9961      1319    2905718 a6b8 a7b8 d6c5 a5a6 c5d4 a6a7 g5g4 f3g4 f4f3 g4g5
f3f2 g5g6 f2f1Q g6g7 d4a7 b8a7 f1a1 a7b8 a1g7 b8a7 g7a1 a7b8 a1e5
 18  9961      2045    4637170 a6b8 a7b8 d6c5 a5a6 c5d4 a6a7 g5g4 f3g4 f4f3 g4g5
f3f2 g5g6 f2f1Q g6g7 d4a7 b8a7 f1a1 a7b8 a1g7 b8a7 g7a1 a7b8 a1e5
 19  9961      2094    4776437 a6b8 a7b8 d6c5
 19  9961      2148    4913390 a6b8 a7b8 d6c5
 20  9961      4102    9385299 a6b8 a7b8 d6c5 a5a6 c5d4 a6a7 g5g4 f3g4 f4f3 g4g5
f3f2 g5g6 f2f1Q g6g7 d4a7 b8a7 f1a1 a7b8 a1g7 b8a7 g7a1 a7b8 a1e5 b8a7 e5c5 a7b8
c5c6

Best regards,
George



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