Author: Vincent Lejeune
Date: 05:14:59 10/18/03
Go up one level in this thread
CM9K SKR + ss=16, 128 MB hash Time Depth Score Positions Moves 0:00 1/8 0.00 13863 1.e3 0:00 1/9 0.00 47222 1.e3 0:00 1/10 0.00 71242 1.e3 0:00 1/11 0.00 137173 1.e3 0:00 1/12 0.00 291616 1.e3 0:01 1/13 0.00 589722 1.e3 0:04 1/14 0.00 1270158 1.e3 0:08 1/15 0.00 2875823 1.e3 1:06 1/15 7.71 25356424 1.Bc1 Kc5 2.Be3+ Kc6 3.Bf4 Kc5 4.Rf5+ Kc6 5.Re5 Kxd6 6.Re8+ Kc5 7.Bxb8 d6 8.e3 Kc6 9.Rd8 Qxb8 10.Rxb8 Ra8 11.Rxa8 Kd7 12.Rg8 Kc6 13.Rg7 1:37 2/16 10.13 39645860 1.Bc1 Kc5 2.Be3+ Kc6 3.Bf4 Kc5 4.Rf5+ Kc6 5.Ka4 a5 6.d4 Na6 7.Rb5 Nc5+ 8.Ka3 Qg8 9.d5+ Qxd5 10.cxd5+ Kxb5 11.bxa7 Kc4 12.a8=Q a4 13.e4 Nxe4 14.Qxa4+ Kxd5 15.Qxd7 5:01 3/17 10.13 131838603 1.Bc1 Kc5 2.Be3+ Kc6 3.Bf4 Kc5 4.Rf5+ Kc6 5.Ka4 a5 6.d4 Na6 7.Rb5 Nc5+ 8.Ka3 Qg8 9.d5+ Qxd5 10.cxd5+ Kxb5 11.bxa7 Kc4 12.a8=Q a4 13.Qa5 b5 14.Be3 Kxd5 15.Qxc3 16:57 4/18 10.24 447238084 1.Bc1 Kc5 2.Be3+ Kc6 3.Bf4 Kc5 4.Rf5+ Kc6 5.Ka4 a5 6.d4 Na6 7.Rb5 Nc5+ 8.Ka3 Qg8 9.d5+ Qxd5 10.cxd5+ Kxb5 11.bxa7 Kc4 12.a8=Q a4 13.Qh8 b5 14.Be3 b4+ 15.Ka2 Nb3 16.Qa8 I stoped here On October 18, 2003 at 07:19:09, Darren Rushton wrote: >[D]qn6/rp1p4/pPkP1R2/K7/2P5/B1pP4/2P1P3/8 w - - 0 1 > >Y. G. Vladimirov >1st Prize Macleod Memorial Tourney 1994 > >Forced mate in 17! > >An amusing problem illustrating the use of pendulum manoeuvres and interferences >to reposition pieces. > >White would like to play Rf8 and Rc8 mate, but must avoid giving stalemate. By >allowing the king to shuttle between c5 and c6 and checking every second move >(otherwise Nc6+ frees the Black forces) White is able to reposition his bishop >at g1 and e2 pawn at e5 to allow the rook to reach f8 via a discovered check. > >The solution is worth close study. >1.Bc1 Kc5 2.Be3+ Kc6 3.Bf4 Kc5 4.Rf5+ Kc6 (If 4…Kd4 5.Rd5 mate) 5.Be5 Kc5 6.Bh2+ >Kc6 (If 6…Kd4 7.Bg1 mate) 7.Rf6 Kc5 8.Bg1+ Kc6 9.e3 Kc5 10.e4+ Kc6 11.Bh2 Kc5 >12.Rf5+ Kc6 (If 12…Kd4 13.Bg1 mate) 13.e5 Kc5 14.Bg1+ Kc6 15.Rf2 Kc5 16.Rf8+ Kc6 >17.Rc8 mate. > >Can a program find it? > >Regards, > >Daz
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