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Subject: Mate in 29?

Author: pavel

Date: 09:24:40 04/13/05


[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

---------------------------------------------------------

So far with Shredder Classic 1.2

New game
3n4/rBp1p3/2P5/2PK4/k2N4/pp2R3/bppB2Rp/q1n1r1b1 w - - 0 1

Analysis by Shredder Classic 1.2:

1.Bxe1
  -+  (-31.21)   Depth: 1/8   00:00:00
1.Bxe1
  -+  (-31.21)   Depth: 1/8   00:00:00
1.Rg4
  =  (0.14)   Depth: 1/8   00:00:00
1.Rg4
  =  (0.14)   Depth: 1/8   00:00:00
1.Rg4 h1Q+
  =  (0.14)   Depth: 2/8   00:00:00
1.Rg4 h1Q+
  =  (-0.11)   Depth: 3/8   00:00:00
1.Rg4 h1Q+
  ³  (-0.61)   Depth: 3/8   00:00:00
1.Rg4 h1Q+ 2.Nf3+ Kb5
  -+  (-37.04)   Depth: 3/11   00:00:00
1.Bxe1
  -+  (-37.03)   Depth: 3/11   00:00:00
1.Bxe1
  -+  (-36.68)   Depth: 3/11   00:00:00
1.Bxe1 h1Q 2.Nxc2
  -+  (-36.16)   Depth: 3/13   00:00:00
1.Rxe1
  -+  (-36.15)   Depth: 3/13   00:00:00
1.Rxe1
  -+  (-35.80)   Depth: 3/13   00:00:00
1.Rxe1 e6+ 2.Rxe6 b1Q
  -+  (-31.69)   Depth: 3/13   00:00:00
1.Rxe1 e6+
  -+  (-32.00)   Depth: 4/16   00:00:00
1.Rxe1 b1Q 2.Rgxg1
  -+  (-32.00)   Depth: 4/16   00:00:00
1.Rxe1 b1Q
  -+  (-32.45)   Depth: 5/16   00:00:00
1.Rxe1 h1Q 2.Rexg1 Qh5+ 3.Rg5 Qf7+ 4.Ke4
  -+  (-32.79)   Depth: 5/16   00:00:00
1.Rxe1 h1Q 2.Rexg1 Qh5+ 3.Rg5 Qf7+ 4.Ke4 b1Q
  -+  (-32.79)   Depth: 6/23   00:00:00  39kN
1.Rg4
  -+  (-32.78)   Depth: 6/25   00:00:00  92kN
1.Rg4
  -+  (-32.43)   Depth: 6/29   00:00:01  102kN
1.Rg4 h1Q+ 2.Nf3+ Kb5 3.Rb4+ Ka5 4.Rg4+ Kb5 5.Rb4+ Ka5 6.Rg4+ Kb5
  =  (0.04)   Depth: 6/29   00:00:01  117kN
1.Rg4 h1Q+ 2.Nf3+ Kb5 3.Rb4+ Ka5 4.Rbe4+ Kb5 5.Nd4+ Ka4
  =  (0.06)   Depth: 7/29   00:00:01  128kN
1.Rg4 h1Q+ 2.Nf3+ Kb5 3.Rb4+ Ka5 4.Rbe4+ Kb5 5.Nd4+ Ka4
  =  (0.06)   Depth: 8/29   00:00:01  160kN
1.Rg4 h1Q+ 2.Nf3+ Kb5 3.Rb4+ Ka5 4.Rbe4+ Kb5 5.Nd4+ Ka4
  =  (0.06)   Depth: 9/29   00:00:02  307kN
1.Rg4 h1Q+ 2.Nf3+ Kb5 3.Rb4+ Ka5 4.Rbe4+ Kb5 5.Nd4+ Ka4
  =  (0.06)   Depth: 10/29   00:00:04  653kN
1.Rg4 h1Q+ 2.Nf3+ Kb5 3.Rb4+ Ka5 4.Rbe4+ Kb5 5.Nd4+ Ka4
  =  (0.08)   Depth: 11/29   00:00:05  1744kN
1.Rg4 h1Q+ 2.Nf3+ Kb5 3.Rb4+ Ka5 4.Rbe4+ Kb5 5.Nd4+ Ka4
  =  (0.10)   Depth: 12/29   00:00:08  4533kN
1.Rg4 h1Q+ 2.Nf3+ Kb5 3.Rb4+ Ka5 4.Rbe4+ Kb5 5.Nd4+ Ka4
  =  (0.10)   Depth: 13/29   00:00:18  10715kN
1.Rg4 h1Q+ 2.Nf3+ Kb5 3.Rb4+ Ka5 4.Rbe4+ Kb5 5.Nd4+ Ka4
  =  (0.12)   Depth: 14/29   00:00:37  23338kN
1.Rg4 h1Q+ 2.Nf3+ Kb5 3.Rb4+ Ka5 4.Rbe4+ Kb5 5.Nd4+ Ka4
  =  (0.14)   Depth: 15/29   00:01:23  51452kN
1.Rg4 h1Q+ 2.Nf3+ Kb5 3.Rb4+ Ka5 4.Rbe4+ Kb5 5.Nd4+ Ka4
  =  (0.14)   Depth: 16/31   00:03:20  112629kN
1.Rg4 h1Q+ 2.Nf3+ Kb5 3.Rb4+ Ka5 4.Rbe4+ Kb5 5.Nd4+ Ka4
  =  (0.15)   Depth: 17/32   00:07:17  241546kN
1.Rg4 h1Q+ 2.Nf3+ Kb5 3.Rb4+ Ka5 4.Rbe4+ Kb5 5.Nd4+ Ka4
  =  (0.15)   Depth: 18/35   00:15:11  507078kN
1.Rg4 h1Q+ 2.Nf3+ Kb5 3.Rb4+ Ka5 4.Rbe4+ Kb5 5.Nd4+ Ka4
  =  (0.15)   Depth: 19/38   00:33:03  1090950kN
1.Rg4 h1Q+ 2.Nf3+ Kb5 3.Rb4+ Ka5 4.Rbe4+ Kb5 5.Nd4+ Ka4
  =  (0.15)   Depth: 20/41   01:13:32  2366093kN

(, MyTown 13.04.2005)





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