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Subject: Re: Rook endgame.

Author: Dan Andersson

Date: 07:28:23 11/26/04

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On November 26, 2004 at 08:49:03, Andreas Stabel wrote:

>On November 25, 2004 at 18:19:34, Dan Andersson wrote:
>
>>This is from another fine book I've bought. 'Decision making at the Chessboard'
>>by V. Eingorn:
>>Eingorn - Georgadze, Odessa 1989
>>[D]8/5p2/6p1/2p1k2p/p1r1p3/P3P1PP/1P1R1P2/1K6 w - - 10 44
>>It seems  like 44. g4 is the winning move. In conjunction Rc2 and a timely g5.
>>The game continued:
>>44.g4 hxg4 45.hxg4 Ke6 46.g5 Kf5 47.Rc2 Rxc2 48.Kxc2 Kg4 49.b3 axb3+ 50.Kxb3 Kf3
>>51.a4 Kxf2 52.a5 Kxe3 53.a6 Kf2 54.a7 e3 55.a8=Q e2 56.Qa2 c4+ 57.Kc3 1-0
>>
>>MvH Dan Andersson
>
>Crafty 19.17 find g4, but thinks h4 is the best reply:
>16->   7:08   0.51   1. h4 f6 2. Rd8 Ke6 3. Rh8 Ke5 4. Rh7
>                     f5 5. Rf7 Ke6 6. Rc7 Kf6 7. Rd7 g5
>                     8. Rd1 <HT>
>17     8:34   0.48   1. h4 Ke6 2. Ka2 Rc1 3. b3 axb3+ 4.
>                     Kxb3 Rb1+ 5. Kc2 Rb6 6. Rd1 Ra6 7.
>                     Kb3 Ra5 8. a4 f6 9. Rd8 Ke5 10. Re8+
>                     Kf5 11. Rd8
>17    13:26   0.58   1. g4 h4 2. Rd8 g5 3. Ra8 Ke6 4. Ra6+
>                     Kd7 5. Ka2 Kc7 6. b4 Rc2+ 7. Kb1 Rxf2
>                     8. bxc5 Rf1+ 9. Kb2 Rf3 10. Rxa4 Rxe3
>17->  14:04   0.58   1. g4 h4 2. Rd8 g5 3. Ra8 Ke6 4. Ra6+
>                     Kd7 5. Ka2 Kc7 6. b4 Rc2+ 7. Kb1 Rxf2
>                     8. bxc5 Rf1+ 9. Kb2 Rf3 10. Rxa4 Rxe3
>18    16:17   0.81   1. g4 h4 2. g5 f6 3. gxf6 Kxf6 4. Rd5
>                     g5 5. Rd1 Ke7 6. Rg1 Kf6 7. Rg4 Kf5
>                     8. f3 Kf6 9. fxe4 Ke5 10. Rxg5+ Kxe4
>18->  26:59   0.81   1. g4 h4 2. g5 f6 3. gxf6 Kxf6 4. Rd5
>                     g5 5. Rd1 Ke7 6. Rg1 Kf6 7. Rg4 Kf5
>                     8. f3 Kf6 9. fxe4 Ke5 10. Rxg5+ Kxe4
>19    30:10   0.64   1. g4 h4 2. g5 f6 3. gxf6 Kxf6 4. Rd1
>                     Kf5 5. Rg1 g5 6. Rg4 Kf6 7. f4 gxf4
>                     8. Rxf4+ Kg5 9. Rg4+ Kh5 10. b3 axb3
>                     11. Kb2 Ra4 12. Kxb3
>19->  66:19   0.64   1. g4 h4 2. g5 f6 3. gxf6 Kxf6 4. Rd1
>                     Kf5 5. Rg1 g5 6. Rg4 Kf6 7. f4 gxf4
>                     8. Rxf4+ Kg5 9. Rg4+ Kh5 10. b3 axb3
>                     11. Kb2 Ra4 12. Kxb3

 Thanks for the output. I don't really like 44. ... h4 since it IMO makes it too
simple to win. I.e., it blocks the king side for blacks king:
>19->  66:19   0.64   1. g4 h4 2. g5 f6 3. gxf6 Kxf6 4. Rd1
>                     Kf5 5. Rg1 g5 6. Rg4 Kf6 7. f4 gxf4
>                     8. Rxf4+ Kg5 9. Rg4+ Kh5 10. ...
 And now              10. Rg2/g1 Kh6 11. Rc2/c1 and black is bust. Nor does 7.
... exf3 e.p. work even if black makes the stronger try 4. ... g5, 5. ... Kg6,
6. ... Kf5

MvH Dan Andersson

>
>Regards
>Andreas



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