Author: Helmut Conrady
Date: 07:20:57 09/15/00
Go up one level in this thread
On September 15, 2000 at 09:01:22, Andreas Stabel wrote: >On September 15, 2000 at 08:43:27, Bernhard Bauer wrote: > >>On September 15, 2000 at 08:18:59, Helmut Conrady wrote: >> >>>Im wondering, what is the deepest chessproblem ever composed. There is a problem >>>created by Petrovic in 1969 which might lead to a mate in 270. >>> >>>[D]8/Bk3p1p/1P3p2/KP2n2p/1P1p4/1Pp2p2/B1P5/7B w - - 0 1 >>> >>>Unfortunately I haven t got the solution. >>> >>>Can onyone explain how to win this. >>>Does anyone know a deeper problem? >>> >>>Thanks in advance. >>> >>>Helmut >> >>Found an old posting. >>----------------------------------------------------------------- >>The task record for a legal position is this one: >> >>Petrovici, "Problem", 1969 >>White: Ka5, Ba2, Ba7, Bh1, pb3, pb4, pb5, pb6, pc2 (9) >>Black: Kb7, Ne5, pc3, pd4, pf3, pf6, pf7, ph5, ph7 (9) >>#270 >> >>Solution: >> >>1.Bb1 h4 2.Ka4 Ka8 >>(Black's king oscillates to and from b7 except when a black >>pawn is moved) >>3.Ka3 4.Ka2 5.Ka1 6.Ba2 7.Kb1 8.Kc1 9.Kd1 10.Ke1 11.Bb1 >>12.Kf1 (White begins a triangulation in order to lose the move) >>13.Kf2 14.Ke1 15.Kd1 15.Kc1 17.Ba2 18.Kb1 19.Ka1 20.Bb1 >>21.Ka2 22.Ka3 23.Ka4 Kb7 24.Ka5 f5 >>(Black moves a pawn rather than permit White's king to be >>moved to a6. White makes nine more triangulations, each time >>forcing Black to move a pawn) >>47...pf4 70...pf6 93...pf5 116...ph3 139...ph2 162...ph6 >>185...ph5 208...ph4 231...ph3, and now >>254.Ka5 Kc8 255.Ka6 f2 256.b7+ Kd7 257 b8=Q f1=Q 258.Q:e5 Q:h1 >>259.Qg7+ Ke6 260.Qg6+ Ke5 261.Bb8+ Ke4 262.Qc6+ Ke3 263.Q:h1 Kf2 >>264.B:f4 Ke2 265.b6 d3 266.c:d3 Kf2 267.Bc2 Ke2 268.Bd1+ Kf2 >>269.Qf3+ Kg1 270.Be3 mate. >> >>Cornel Pacurar >>http://www.orbonline.net/~corpac/index.html >>---------------------------------------------------------------------- >>Kind regards >>Bernhard > >I don't think this solution is correct. Black has to move some pawns during >the first white king tour or the white king will escape to g3 or h3 and >start munching black pawns and win that way. To stop this black has to do >the following pawn moves h4-h3-h2 and f5-f4. This will cause the mate to >be a lot less than 270, but still awesome. I think the 270 moves must be correct, because this problem was discussed in the problem magazine "Die Schwalbe" 8/2000. The discussion was: 270 or 271 moves to mate. :) Helmut
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