Author: Heiner Marxen
Date: 21:58:01 01/26/01
Go up one level in this thread
On January 25, 2001 at 11:13:10, leonid wrote: >On January 25, 2001 at 10:57:06, José Antônio Fabiano Mendes wrote: > >>On January 25, 2001 at 09:57:29, leonid wrote: >> >>>Hi! >>> >>>If you like to solve some average mate position... >>> >>>[D]R1brkrnR/1N1qqqbN/3qqq1B/1B1bQNbQ/1bn1Q2B/3Q1Q2/3Q1Q2/1K6 w - - >>> >>>Please indicate your result. >>> >>>If you can depose here just one forced mate position from some world chess >>>championship, it will be nice. Indicate exactly where this competition happened. >>>I speak about championship where human found forced mate. Never mind if this >>>championship was between two humans or man and machine. It could give an >>>opportinity to see which program is best in real life situation. Even more that >>>this, it will permit to tune selective search for forced mate to make it more >>>effective. >>> >>>Thanks, >>>Leonid. >> >> As written the second row [1N1qqqb] accounts for only 7 squares, >> that's why the diagram is not displayed. JAFM > >Thanks for indicating mistake! I hope that now it will come in graphics. At list >this time I will look if it is really there. > >Leonid. Well, you askeed for it, didn't you? According ot Chest, 5 moves solve it as a mate in 9 moves: nor one, not two... five. I suspect, you did not really know the solution?!?! Nxf6+ Nfxd6+ Nbxd6+ Q5xd5 Qxe6 Let me try to find something like a PV for everybody: Nxf6+ B7xf6 Nfxd6+ Bxd6 Q5xd5 Bde5 Rxc8 Na3+ Qxa3 Bg7 Bxd7+ Q6xd7 Qfxf7+ Rxf7 Qfxf7+ Qxf7 Qxd7# Nfxd6+ Bxd6 Q5xd5 Be5 Nxf6+ B7xf6 Rxc8 Na3+ Qxa3 Bg7 Bxd7+ Q6xd7 Qfxf7+ Rxf7 Qfxf7+ Qxf7 Qxd7# Nbxd6+ Bxd6 Nxf6+ B5xf6 Nxg7+ Bxg7 Qhxf7+ Q6xf7 Qxf7+ Bxf7 Bxd7+ Bxd7 Qxe7+ Nxe7 Qxe7+ Bxe7 Qxd7# Q5xd5 Na3+ Qxa3 Qde5 Nxf6+ B7xf6 Bxd7+ Bxd7 Ng7+ Bxg7 Rxd8+ Qxd8 Qhxf7+ Qxf7 Qfxf7+ Rxf7 Qfxf7# Qxe6 Nxd2+ Qdxd2 Bxe4+ Qfxe4 Qb2+ Qxb2 Qd1+ Qxd1 Qexe6 Nxg7+ Ke7 Qxd7+ Rxd7 Qxe6+ Qxe6 Qxf8# This is, of course, a small extract of the 60000 lines solution output from Chest... ;-) 15.3 hrs, K7/600 with 350MB hash. ;-) Heiner
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