Author: F. Huber
Date: 09:47:27 04/13/05
Go up one level in this thread
On April 13, 2005 at 12:38:58, pavel wrote: >On April 13, 2005 at 12:32:20, F. Huber wrote: > >>On April 13, 2005 at 12:24:40, pavel wrote: >> >>>[D] 3n4/rBp1p3/2P5/2PK4/k2N4/pp2R3/bppB2Rp/q1n1r1b1 w - - 0 1 >>> >>> >>> >>> >>> >>>Mate in 29 >>>M. Kwiatkowski >>>2nd Honourable Mention, The Problemist 1992 >>> >>>1.Rg4 Even if it threatens two short mates, with Nxb3+ and Ne6+, it is still a >>>nice key. 1...h1Q+ 2.Nf3+ Kb5 Now the Knight and Rook each have chores, but they >>>can only do them if they work as a fine-tuned team - one of them holding the Qh1 >>>at bay, while the other one does its job. 3.Rb4+ Ka5 4.Rbe4+! Now the Knight is >>>free. 4...Kb5 5.Nd4+ Ka4 6.Ne2+ Kb5 7.Nc3+ Ka5 8.Nxa2+ Why this Bishop had to go >>>will become clear later. 8...Kb5 Now it is the Rook's turn, but the Knight must >>>first unpin it. 9.Nc3+ Ka5 10.Ne2+ Kb5 11.Nd4+ Ka4 12.Nf3+! Kb5 13.Rb4+ Ka5 >>>14.Rbxb3+ The reason for removing this pawn will be revealed later too, but at >>>least we understand why the Ba2 had to go - it would have pinned the Rb3. >>>14...Ka4 15.Rb4+ Ka5 16.Rbe4+! and the Knight is unpinned once more. 16...Kb5 >>>17.Nd4+ Ka4 18.Ne2+ Kb5 19.Nc3+ Ka5 20.Na2+! It is a very nice feature of this >>>problem that the Knight goes back to the empty square a2 where it once captured >>>a Bishop. Now, it has to shield a3 from the Qa1. 20...Kb5 21.Ba6+ Finally, the >>>mating attack. 21...Rxa6 If 21...Kxa6, then 22.Rxa3+ (that is why Pb3 had to go >>>and Qxa3 had to be prevented) 22...Kb5 23.Nc3 mate. 22.Nc3+ Ka5 23.Ne2+ Kb5 >>>24.Nd4+ Ka4 25.Nf3+! One last unpin of the Rook, and it's mate: 25...Kb5 26.Rb4+ >>>Ka5 27.Rb6+ Ka4 28.Rxa6+ Kb5 29.Ra5 mate. >>> >>>http://www.xs4all.nl/~timkr/chess2/diarytxt.htm >>> >>>--------------------------------------------------------- >> >>ChestUCI Ver.4.1: >>CPU: Celeron 400MHz >>FEN: 3n4/rBp1p3/2P5/2PK4/k2N4/pp2R3/bppB2Rp/q1n1r1b1 w - - >>Parameters found in Database ! >>Search for Special-Mate [C0/R2/K3/P10/X28] in 29 ... (Hash=43MB) >> 29 00:08 117.204 44.395 +M29 1.Tg4 >>Search completed ... (Time=7.91s) >>Mate in 29 found ! (00:07) >>1.Rg4 h1Q+ 2.Nf3+ Kb5 3.Rb4+ Ka5 4.Rbe4+ Kb5 5.Nd4+ Ka4 6.Ne2+ Kb5 7.Nc3+ Ka5 >>8.Nxa2+ Kb5 9.Nc3+ Ka5 10.Ne2+ Kb5 11.Nd4+ Ka4 12.Nf3+ Kb5 13.Rb4+ Ka5 14.Rbxb3+ >>Ka4 15.Rb4+ Ka5 16.Rbe4+ Kb5 17.Nd4+ Ka4 18.Ne2+ Kb5 19.Nc3+ Ka5 20.Na2+ Kb5 >>21.Ba6+ Rxa6 22.Nc3+ Ka5 23.Ne2+ Kb5 24.Nd4+ Ka4 25.Nf3+ Kb5 26.Rb4+ Ka5 27.Rb6+ >>Ka4 28.Rxa6+ Kb5 29.Ra5# >>1 Solution (Mate in 29) >> >>Regards, >>Franz. > > >This is not fair. How come none of my programs finds it. :( > >pavs Hi Pavel, that´s quite simple: Implement some of those ´special´ parameters of ChestUCI into your program, like ´mate threats´, ´king´s flightsquares´ or limiting the opponents pieces or moves! You see - it´s really easy ... ;-) Regards, Franz.
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