Author: Uri Blass
Date: 14:46:30 08/10/00
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On August 10, 2000 at 17:22:58, Wayne Lowrance wrote: >On August 10, 2000 at 16:17:47, Christoph Fieberg wrote: > >>Unbelievable, but true: >>I composed a position which is mate in 1 and can easily found, but Fritz6 on >>Pentium III, 500 Mhz and 32 MB Hash needs more than 1 hour to show it (excatly >>1:03:17)!!! >>How do other computers react? >> >>The position is >>FEN: 8/8/pppppppK/NBBR1NRp/nbbrqnrP/PPPPPPPk/8/Q7 w - - 0 1 >> >>It is possible to reach this position from starting position: >>1.Sa3 Sa6 2.Sc4 Sc5 3.Sa5 Sa4 4.b3 b6 5.La3 La6 6.Lc5 Lc4 7.h4 h5 8.Th3 Th6 >>9.Td3 Te6 10.Td5 Te4 11.Sh3 Sh6 12.e3 e6 13.Le2 Le7 14.Lf3 Lf6 15.d3 d6 16.Ke2 >>Ke7 17.Dd2 Lc3 18.Te5 Lb4 19.Th1 Td4 20.Lc6 Dd7 21.Lb5 Th8 22.Td5 Kf6 23.Sg1 Sg4 >>24.Th3 Se5 25.Tg3 Kf5 26.Tf3+ Kg4 27.Tf5 a6 28.g3 c6 29.Sf3 Kh3 30.Sg5+ Kh2 >>31.Se4 Sg6 32.Kf3 Se5+ 33.Kf4 Sg6+ 34.Kg5 Se5 35.a3 Th6 36.c3 Tf6 37.De2 g6 >>38.Kh6 Sg4+ 39.Kh7 De7 40.Tf4 Tf5 41.Sg5 Df6 42.Df3 De5 43.Kg8 De4 44.Sh3 Tg5 >>45.Tf6 Sh6+ 46.Kh7 Sg4 47.Df5 Kg2 48.Kg7 Sh2 49.De5 Tg4 50.Sg5 Sf3 51.Sh7 Sg1 >>52.Df4 [52.Tf5 Se2 53.Sf6 Sf4 54.Se8 Kh2 55.Tg5 Kg2 56.Kh7 Kh2 57.Sg7 Kg2 58.Sf5 >>f6 59.f3 Kh2 60.Kh6 Kh3 Test it! What time do computers need to reach a certain >>search depths?] 52...Se2 53.Df3+ Kh2 54.Tff5 Sf4 55.Dd1 Kg2 56.Tg5 Kh2 57.Sf6 >>Kg2 58.Sg8 Kh2 59.Se7 Kg2 60.Sf5 Kh2 61.Da1 Kg2 62.f3 f6 63.Kh6 Kh3 Mate in 1! >>(64. Dh1#). What time do different programms need to show it in the display? 1–0 >> >>52.Tf5 leads to a position with White Queen on e5 (instead on a1). >>FEN: 8/8/pppppppK/NBBRQNRp/nbbrqnrP/PPPPPPPk/8/8 w - - 0 61 >> >>How long do computers need to reach for example depth 9? >>Fritz 6 reached depth 5 after 9 hours!! (on Pentium III, 500 MHz, 32 MB Hash) He >>showed 61. Dxe4 Txe4 62. dxe4 Lxc5 3. Txg4 hxg4 as best moves (+1.56 for White). >>What is the best move? >> >>Christoph > >nine hours to get to depth _five_ ? hard to understand. I think something is >wrong. It is very easy to understand. If a program does a lot of extensions it need 9 hours to get to depth 5. The position that was posted is a position when some programs do a lot of extensions because there are a lot of possible captures. The position is not position from a practical game and I do not know about cases when there were so many captures in a practical games. Uri
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