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Subject: Re: Testposition - Rare Pawn ending

Author: Enrique Irazoqui

Date: 03:36:13 03/05/01

Go up one level in this thread


On March 04, 2001 at 22:53:23, Bruce Moreland wrote:

>I'm interested in seeing more information about Fritz' solution.  That's an
>amazing time.
>
>bruce

On a dual P933 with 512MB hash:

Badai,B - Study
8/1p6/p4p1p/2p1P2k/5P2/6pP/1P4P1/6K1 w - - 0 1

Analysis by DEEP FRITZ   :

1.e6 Kg6 2.f5+ Kg7 3.Kf1
  =  (0.00)   Depth: 4/6   00:00:00
1.e6 Kg6 2.f5+ Kg7 3.Kf1
  =  (0.00)   Depth: 4/6   00:00:00
1.e6 Kg6 2.f5+ Kg7 3.Kf1
  =  (0.00)   Depth: 4/6   00:00:00
1.e6 Kg6 2.f5+ Kg7 3.Kf1
  =  (0.00)   Depth: 4/6   00:00:00
1.e6 Kg6 2.f5+ Kg7 3.Kf1
  =  (0.00)   Depth: 4/6   00:00:00
1.e6 Kg6 2.f5+ Kg7 3.Kf1
  =  (0.00)   Depth: 4/6   00:00:00
1.e6 Kg6 2.f5+ Kg7 3.Kf1
  =  (0.00)   Depth: 4/6   00:00:00
1.e6 Kg6 2.f5+ Kg7 3.Kf1
  =  (0.00)   Depth: 4/6   00:00:00
1.e6 Kg6 2.f5+ Kg7 3.Kf1
  =  (0.00)   Depth: 4/6   00:00:00
1.e6 Kg6 2.f5+ Kg7 3.Kf1
  =  (0.00)   Depth: 4/6   00:00:00
1.e6 Kg6 2.f5+ Kg7 3.Kf1
  =  (0.00)   Depth: 4/6   00:00:00
1.e6 Kg6 2.f5+ Kg7 3.Kf1 b6
  =  (-0.19)   Depth: 5/7   00:00:00
1.e6 Kg6 2.f5+ Kg7 3.Kf1 b6 4.Ke2
  =  (-0.09)   Depth: 6/9   00:00:00
1.e6 Kg6 2.f5+ Kg7 3.Kf1 Kf8 4.Ke2 Ke7
  =  (-0.03)   Depth: 7/10   00:00:00  2kN
1.e6 Kg6 2.f5+ Kg7 3.Kf1 Kf8 4.Ke2 Ke7 5.Ke3
  =  (0.00)   Depth: 8/12   00:00:00  3kN
1.e6 Kg6 2.f5+ Kg7 3.Kf1 Kf8 4.Ke2 h5 5.Kf3 h4
  =  (0.16)   Depth: 9/12   00:00:00  7kN
1.e6 Kg6 2.f5+ Kg7 3.Kf1 h5 4.Ke2 h4 5.Kf3 b6 6.Kg4
  =  (0.13)   Depth: 10/14   00:00:00  15kN
1.e6 Kg6 2.f5+ Kg7 3.Kf1 a5 4.Ke2 c4 5.Ke3 b5 6.Kf4 c3
  ²  (0.41)   Depth: 11/16   00:00:00  28kN
1.e6 Kg6 2.f5+ Kg7 3.Kf1 a5 4.Ke2 Kf8 5.Ke3 h5 6.Kf4 h4
  =  (0.25)   Depth: 12/17   00:00:00  54kN
1.e6 Kg6 2.f5+ Kg7 3.Kf1 a5 4.Ke2 Kf8 5.Ke3 c4 6.Ke4 b5
  ²  (0.34)   Depth: 13/19   00:00:00  90kN
1.e6--
  =  (0.03)   Depth: 14/20   00:00:00  140kN
1.e6-- Kg6 2.f5+ Kg7 3.Kf1 a5 4.Ke2 Kf8 5.Ke3 b5 6.h4 c4
  =  (-0.03)   Depth: 14/21   00:00:00  174kN
1.e6 Kg6 2.f5+ Kg7 3.Kf1 a5 4.Ke2 a4 5.Ke3 b5 6.Ke4 c4
  =  (0.16)   Depth: 15/22   00:00:00  304kN
1.e6--
  =  (0.00)   Depth: 16/26   00:00:00  459kN
1.e6--
  =  (0.00)   Depth: 16/26   00:00:00  556kN
1.e6 Kg6 2.f5+ Kg7 3.Kf1 a5 4.Ke2 b5 5.Kd3 Kf8 6.Ke4 a4
  ³  (-0.41)   Depth: 17/27   00:00:01  1003kN
1.e6--
  µ  (-0.72)   Depth: 18/28   00:00:01  1538kN
1.e6-- Kg6 2.f5+ Kg7 3.Kf1 a5 4.Ke2 b5 5.Kd3 a4 6.h4 b4
  µ  (-0.81)   Depth: 18/28   00:00:02  1824kN
1.f5!
  µ  (-0.78)   Depth: 18/33   00:00:03  2628kN
1.f5! fxe5 2.h4 c4 3.Kf1 e4 4.Ke2 b5 5.Ke3 b4 6.Kf4 Kxh4
  =  (0.06)   Depth: 18/35   00:00:03  2902kN
1.f5!
  ²  (0.38)   Depth: 19/36   00:00:03  3190kN
1.f5! fxe5 2.h4 c4 3.Kf1 e4 4.Ke2 b5 5.Ke3 b4
  ²  (0.41)   Depth: 19/36   00:00:04  3370kN
1.f5!
  ±  (0.72)   Depth: 20/39   00:00:05  4730kN
1.f5! fxe5 2.h4 c4 3.Kf1 b5 4.Ke2 b4 5.Kf3 Kxh4 6.f6 c3
  ±  (0.78)   Depth: 20/39   00:00:06  5290kN
1.f5!
  ±  (1.09)   Depth: 21/40   00:00:09  8059kN
1.f5! fxe5 2.h4 c4 3.Kf1 b5 4.Ke2 e4 5.Ke3 b4 6.Kxe4 c3
  +-  (1.56)   Depth: 21/40   00:00:10  9116kN
1.f5!
  +-  (1.88)   Depth: 22/44   00:00:14  13729kN
1.f5! fxe5 2.h4 c4 3.Kf1 b5 4.Ke2 e4 5.Ke3 b4 6.Kxe4 a5
  +-  (3.19)   Depth: 22/44   00:00:16  15499kN
1.f5--
  +-  (2.88)   Depth: 23/35   00:00:23  21580kN, tb=6
1.f5-- fxe5 2.h4 c4 3.Kf1 b5 4.Ke2 e4 5.Ke3 b4 6.Kxe4 c3
  +-  (2.63)   Depth: 23/44   00:00:25  24507kN, tb=7
1.f5!
  +-  (2.94)   Depth: 24/45   00:00:38  36790kN, tb=32
1.f5! fxe5 2.h4 c4 3.Kf1 b5 4.Ke2 e4 5.Ke3 b4 6.Kxe4 a5
  +-  (4.44)   Depth: 24/45   00:00:45  43383kN, tb=39
1.f5!
  +-  (4.75)   Depth: 25/46   00:01:12  70672kN, tb=182
1.f5! fxe5 2.h4 c4 3.Kf1 b5 4.Ke2 e4 5.Ke3 b4 6.Kxe4 c3
  +-  (5.88)   Depth: 25/47   00:01:29  87402kN, tb=191
1.f5 fxe5 2.h4 c4 3.Kf1 b5 4.Ke2 e4 5.Ke3 b4 6.Kxe4 c3
  +-  (5.84)   Depth: 26/49   00:02:11  132947kN, tb=700
1.f5 fxe5 2.h4 c4 3.Kf1 b5 4.Ke2 e4 5.Ke3 b4 6.Kxe4 c3
  +-  (5.94)   Depth: 27/50   00:03:45  239983kN, tb=2172

(Irazoqui, Cadaqués 05.03.2001)

>On March 04, 2001 at 12:28:24, Enrique Irazoqui wrote:
>
>>On March 04, 2001 at 12:05:53, Sune Larsson wrote:
>>
>>>
>>>  [D]8/1p6/p4p1p/2p1P2k/5P2/6pP/1P4P1/6K1 w - - 0 1
>>>
>>>  Badai, 1962
>>>
>>>  A clean cut pawn ending this time, 5 versus 6 pawns. But white
>>>  to move and win. This is a rare flower and not a normal ending.
>>>  A Swedish IM once told me that he had studied and learned all
>>>  there is about pawn endings. And that he now *knew* them all.
>>>  As in the stories he then went out to play an important team match,
>>>  faced a complicated (right!) pawn ending - and lost it. They can
>>>  be real tricky. This one is about taking squares instead of pawns -
>>>  taking space instead of material. Mind you - a pawn down in a normal
>>>  ending is mostly a loss. And here white moves for the win.
>>>  The solution is further down.
>>>
>>>  Test: White to move and win. 1) Can your program find the win?
>>>                               2) How much time needed?
>>>
>>>  Sune
>>
>>I knew this one. Time to see f5 on a dual P933:
>>
>>Deep Shredder 125''
>>Deep Fritz 3''
>>Tigers 23''
>>Shredder 5 201''
>>Goliath light 169''
>>Junior 6a 102''
>>Junior 7 beta >300''
>>Gandalf 4.32h 97''
>>Nimzo 8 >300''
>>Crafty 18.01 24''
>>Hiarcs 7.32 >300''
>>SOS 54''
>>
>>Enrique
>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>Badai,B
>>>Shajmati, 1962
>>>
>>>1.f5 fxe5 2.h4 c4 3.Kf1 a5 4.Ke2 a4 [4...e4 5.Ke3 a4 6.Kf4 c3 7.Kxg3 c2 8.Kh3
>>>c1Q 9.g4#] 5.Kf3 c3 [5...Kxh4 6.f6] 6.Kxg3 cxb2 7.Kh3 b1Q 8.g4# 1-0



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