Author: Heiner Marxen
Date: 11:45:12 02/17/00
Go up one level in this thread
On February 17, 2000 at 13:37:57, Andreas Stabel wrote: >On February 17, 2000 at 12:43:17, Heiner Marxen wrote: > >>On February 17, 2000 at 04:03:37, Andreas Stabel wrote: >> >>>On February 16, 2000 at 14:30:40, Vincent Lejeune wrote: >>[snip] >>>>This study was posted some years ago (around 1997) in the news : >>>> >>>>[D]8/Bk3p1p/1P3p2/KP2n2p/1P1p4/1Pp2p2/B1P5/7B w - - >>>>Mate in 270 moves >>>> >>>>Good luck ! ;) >>> >>>I'm sorry to say that this is "only" a mate in 180 or so, but still very nice. >>>Here is one more which is very deep. >>>[D]bBrb1B2/P1n1r2p/1Kp1Pb1p/2pk1P1p/5P2/1P2pP2/1pP1P3/1R4n1 w - - 0 1 >>> >>>Regards >>>Andreas stabel >> >>After some minutes staring at it I see a bunch of threats and defenses, >>but nothing strikes me. I'd like to get a solution hint :-) >>What is the source for this problem (author etc)? >> >>Heiner > >To copy what information I have: > >--- Start quote --- >The Blathy problem is given in The Encyclopedia of Chess by Ann Sunnucks >(New York: St. Martin's Press, 1970) on page 285. No solution is given but >"The solution consists of a manoeuvre of 16 moves repeated 17 times." > >I have set out the EPD file with the problem as given by Sunnucks: > >bBrb1B2/P1n1r2p/1Kp1Pb1p/2pk1P1p/5P2/1P2pP2/1pP1P3/1R4n1 w - - c0 Published >in Vielzugige Schachhaufgaben by O. T. Blathy.;id Mate in 290 by O. T. >Blathy; >--- End quote --- Thanks very much. I like to name the author, whenever I cite a problem. Credit where credit is due! >The moves before the 16 moves sequence are: >1. Rd1+ Bd4 2. c4+ Kd6 3. Rg1 Bc3 4. Rd1+ Bd4 [more exactly: 3. Rxg1] Aah, I alraedy considered this variant, but did not see the consequences. The double pins to the bk at d6 were all too obvious. >The idea is that the king has to move to a space where it can change the >parity of the move and then go back to threaten the black bishop which >moves between a8 and b7. After 16 or 17 moves black is forced to move a pawn >and so on. In the end black will have run out of postponing moves and will >loose. Zugwang! White forces black to move Rxb8, or loose Ba8... now I see it. From here I should be able to work out the details. >The same theme is used in the mate in 270 above. Yes, zug is a standard trick to construct very deep mates. >Regards >Andreas Stabel Thanks for the info! Heiner
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