Author: Andreas Stabel
Date: 06:01:22 09/15/00
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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. Regards Andreas Stabel
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