Author: Enrique Irazoqui
Date: 09:20:23 02/10/01
Go up one level in this thread
On February 10, 2001 at 11:53:07, leonid wrote: >On February 10, 2001 at 11:17:19, Heiner Marxen wrote: > >>On February 10, 2001 at 10:36:39, leonid wrote: >> >>>On February 10, 2001 at 08:23:58, Uri Blass wrote: >>> >>>>On February 10, 2001 at 07:42:35, leonid wrote: >>>> >>>>>Hi! >>>>> >>>>>If you like to solve a mate, try this one: >>>>> >>>>>[D]3R2K1/q3q1B1/2bQ3Q/QQ3NQ1/2NnQQB1/Qq1qq1nQ/2nqr3/2nkbRq1 w - - >>>>> >>>>>Please, indicate your result. >>>>> >>>>>Thanks, >>>>>Leonid. >>>> >>>>easy? >>> >>>When I found this position, yesterday, it was solved by selective search 9 moves >>>deep. I expect that shortest mate is even closer. Move that lead to mate is >>>checking move. This is why I wrote "easy". >>> >>>Leonid. >> >>There is no mate in 8 according to Chest (55 mins K7/600, 350MB hash). > >Thanks! Now it is for sure 9 moves position. > >Leonid. On a mobile P750 with 128MB hash, Junior 7 beta finds a mate in 9 in 2 minutes. Junior is good at solving this sort of freak mates, while Deep Fritz refuses to compute them and crashes. Enrique New position 3R2K1/q3q1B1/2bQ3Q/QQ3NQ1/2NnQQB1/Qq1qq1nQ/2nqr3/2nkbRq1 w - - 0 1 Analysis by Junior 7 beta: 1.Qfxg3 Qdxc4+ 2.Qxc4 Qxc4+ 3.Qad5 Q3xg5 4.Qexe7 +- (9.87) Depth: 3 00:00:00 341kN 1.Qexc6 Qf7+ 2.Kh7 Qxf4 3.Nxd4 +- (11.59) Depth: 3 00:00:00 469kN 1.Qxd3 Qf7+ 2.Kh7 Qexd3 3.Qaxd2+ +- (16.58) Depth: 3 00:00:00 718kN 1.Qxd2+ Qdxd2 2.Nfxe3+ Qdxe3 3.Bxe2+ Kxe2 4.Qexe3+ +- (22.12) Depth: 3 00:00:00 975kN 1.Nfxe3+ Q2xe3 2.Bxe2+ Kxe2 3.Qxe1+ Nxe1 4.Qfxe3+ +- (22.50) Depth: 3 00:00:00 1235kN 1.Nfxe3+! +- (22.80) Depth: 6 00:00:01 2392kN 1.Nfxe3+! Qgxe3 2.Qbxb3 Qxc4+ 3.Qxc4 Qxg5 4.Qxd2+ Qxd2 5.Qhxg3 Bxe4 +- (27.04) Depth: 6 00:00:04 6839kN 1.Nfxe3+! +- (27.34) Depth: 9 00:00:21 33305kN 1.Nfxe3+! Qgxe3 2.Rxe1+ Qxe1 3.Qxe1+ Nxe1 4.Qbxb3+ Ndxb3 5.Bxe2+ Ncxe2 6.Qxb3+ Kc1 7.Qexe3+ Qexe3 8.Qxe3+ Qdxe3 9.Qbd1# +- (#9) Depth: 9 00:02:00 108950kN (Irazoqui, CadaquƩs 10.02.2001) > >>>>I am interested to know how much time do humans need to solve it. >>> >>>>Please indicate your result,the tree that you generated to prove the mate and >>>>your time. >>>> >>>>I am not going to do it because I am too lazy but I can give you a hint that it >>>>is a mate in at most 9 moves so you do not need to search longer lines >>>> >>>>Uri >> >>I stared at it for some minutes, myself. I did like Nb2+ until I found >>that the knight at c4 is pinned! Uuuh. That's computer stuff ;-) >> >>Heiner
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