Author: Heiner Marxen
Date: 05:04:56 02/26/02
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On February 25, 2002 at 12:43:33, leonid wrote: >On February 25, 2002 at 10:47:42, Heiner Marxen wrote: > >>On February 23, 2002 at 19:29:04, leonid wrote: >> >>>[D]5B2/pRNRQN2/p2qqrkr/K2p3p/P2q3n/P2bbnnq/PPQPNN2/5B2 w - - >>> >>>Please indicate your result. >>> >>>Thanks, >>>Leonid. >> >>Chest confirms that there is no mate-in-10. Hence, the already found >>solutions in 11 moves are shortest possible. I'll followup, if depth==11 >>is completed... > >Thanks, Heiner! > >Your help is all the time valuable. This positions look like very easy and with >more, or less normal branching factor up to depth 10. At 10 it jump >dramatically. At least, it is true for my program. If mine looked 9 moves only >in 23 min. and had previous branching 6.65, it not responded for 10 moves even >after 8 hours. This signify that branching factor jumped more that two times. > >Cheers, >Leonid. Hi Leonid, Chest finds a unique key move for depth 11 (Athlon 1500+, 2.7 hours, 128MB hash) PV: Nh8+ Kf5 Bxh3+ Qg4 Qxd3+ Ne4 Nxe6 Bxd2+ b4 Bxb4+ Rxb4 Rxe6 Qf7+ Ref6 Rxd6 Ng2 Rxd5+ Ne5 Rxe5+ Kxe5 Qfd5# Here is my timing info: # 4 0.03s 3kN [ 5.34] 1.04 459- 0 # 5 0.17s [ 5.67] 13kN [ 4.27] 1.20 2522- 0 # 6 0.70s [ 4.12] 53kN [ 3.95] 1.64 11254- 0 # 7 2.63s [ 3.76] 216kN [ 4.10] 2.22 45584- 0 # 8 13.78s [ 5.24] 1468kN [ 6.79] 2.56 249668- 0 # 9 107.31s [ 7.79] 15276kN [ 10.41] 2.59 1704722- 6749 # 10 1318.46s [ 12.29] 187860kN [ 12.30] 2.64 20453322- 17254089 # 11 9864.46s [ 7.48] 1420383kN [ 7.56] 2.70 151896018- 148696785 So, it does jump with its EBF, but not as dramatically as for you. In the rest of my statistics I also do not see anything unusual or dramatic. Dunno, what kind of effect you are experiencing, sorry. Cheers, Heiner
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