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Subject: Re: Easy for humans

Author: Andrew Williams

Date: 03:20:55 02/17/02

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On February 17, 2002 at 04:55:13, Steffen Jakob wrote:

>Here is another position which is easy to solve for humans. In a blitz game
>between Hossa and Arasan the following position was on the board:
>
>[D]8/8/4B2p/2K5/r5P1/p5k1/Rb6/8 b - - 7 116
>
>For humans it's rather easy to see that 117... Rxg4 wins without any problems
>because the white rook is totally paralyzed. Unfortunately Hossa wasn't able to
>see this in the blitz game. So the game continued until the 50 moves rule forced
>Hossa to take the bishop and finally to win the game.
>Which engines find 117... Rxg4 in which time?
>

PM takes the Pawn in 0 seconds:

 1>   123     0        15   1...Ra6
 1b   124     0        34   1...Rd4
 1b   145     0        56   1...Rxg4
 1=   186     0       118   1...Rxg4 2.Bxg4 Kxg4
 2>   186     0       122   1...Rxg4 2.Bxg4 Kxg4
 2=   186     0       154   1...Rxg4 2.Bxg4 Kxg4
 3>   186     0       179   1...Rxg4 2.Bxg4 Kxg4
 3=   186     0       313   1...Rxg4 2.Bxg4 Kxg4
 4>   186     0       417   1...Rxg4 2.Bxg4 Kxg4
 4=   186     0       769   1...Rxg4 2.Bxg4 Kxg4
 5>   178     0      1807   1...Rxg4 2.Bxg4 Kxg4 3.Kc6
 5=   178     0      2160   1...Rxg4 2.Bxg4 Kxg4 3.Kc6
 6>   178     0      2625   1...Rxg4 2.Bxg4 Kxg4 3.Kd5 h5
 6=   191     0      5032   1...Rxg4 2.Bxg4 Kxg4 3.Kd5 h5
 7>   191     0      6336   1...Rxg4 2.Bxg4 Kxg4 3.Kd5 h5
 7=   191     0     11697   1...Rxg4 2.Bxg4 Kxg4 3.Kd5 h5
 8>   191     0     13605   1...Rxg4 2.Bxg4 Kxg4 3.Kc6 h5 4.Kd5 h4
 8=   219     0     28546   1...Rxg4 2.Bxg4 Kxg4 3.Kc6 h5 4.Kd5 h4
 9>   219     0     33045   1...Rxg4 2.Bxg4 Kxg4 3.Kc6 h5 4.Kd5 h4
 9=   219     0     62284   1...Rxg4 2.Bxg4 Kxg4 3.Kc6 h5 4.Kd5 h4
10>   219     0     71054   1...Rxg4 2.Bxg4 Kxg4 3.Kc6 h5 4.Kd6 h4 5.Kd5 h3
10=   249     0    156457   1...Rxg4 2.Bxg4 Kxg4 3.Kc6 h5 4.Kd6 h4 5.Kd5 h3
11>   249     0    172800   1...Rxg4 2.Bxg4 Kxg4 3.Kc6 h5 4.Kd6 h4 5.Kd5 h3
11=   249     1    283914   1...Rxg4 2.Bxg4 Kxg4 3.Kc6 h5 4.Kd6 h4 5.Kd5 h3
12>   249     1    315233   1...Rxg4 2.Bxg4 Kxg4 3.Kc6 h5 4.Kd6 h4 5.Ke6 h3
                            6.Kd5 h2
12=   337     4   1018346   1...Rxg4 2.Bc8 h5 3.Bb7 h4 4.Kd6 h3 5.Bh1 h2
                            6.Kc5 Rg5 7.Kc6 Kf4
13>   222     8   2401091   1...Rxg4 2.Bxg4 Kxg4 3.Kd5 h5 4.Ke4 h4 5.Ke3 h3
                            6.Kf2 Bd4 7.Ke2


Andrew



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