Author: Paulo Soares
Date: 16:51:54 01/31/99
Go up one level in this thread
On January 31, 1999 at 13:06:15, Bruce Moreland wrote:
>
>On January 31, 1999 at 10:43:32, Paulo Soares wrote:
>
>>
>> I was accompanying the game "Leitão,RxJanssen,R" played in Wiljk
>>aan Zee(B), and I came across with this position, that called
>>me attention: ra8, pa6, ka5, Bd3, Kd2, and black plays. Can
>>the blacks gain this end(it's a tablebase ending)? Janssen played
>>61... Rc8 and the game finished with a draw.
>> Rafael Leitão is a young Brazilian of 19 years,three times
>>champion of my country and, in my opinion the best brazilian player
>>since Henrique Mecking. Seems to me that he will reach at the level
>>of super GM.
>>
>>Best Regards,
>>
>>Paulo Soares, from Brazil
>
>Janssen did fine on that move, but apparently messed up somewhere else.
>
>Here is the game-theoretical best continuation, from the initial position, with
>colors reversed:
>
> a b c d e f g h
> +---+---+---+---+---+---+---+---+
>8 | |///| |///| |///| |///| 8
> +---+---+---+---+---+---+---+---+
>7 |///| |///| k |///| |///| | 7
> +---+---+---+---+---+---+---+---+
>6 | |///| |/b/| |///| |///| 6
> +---+---+---+---+---+---+---+---+
>5 |///| |///| |///| |///| | 5
> +---+---+---+---+---+---+---+---+
>4 | K |///| |///| |///| |///| 4
> +---+---+---+---+---+---+---+---+
>3 |/P/| |///| |///| |///| | 3
> +---+---+---+---+---+---+---+---+
>2 | |///| |///| |///| |///| 2
> +---+---+---+---+---+---+---+---+
>1 |/R/| |///| |///| |///| | 1
> +---+---+---+---+---+---+---+---+
> a b c d e f g h
>
>1. Kb5 Kc7 2. a4 Be5 { Bg3 } 3. Rd1 Bf4 { Bg3, Bh2, Kb8 } 4. Re1 Bg3 5. Re2 Bh4
>{ Kb8 } 6. a5 Bf6 { Kb8 } 7. Re4 Kb8 { Kb7 } 8. a6 Ka8 9. Rf4 { Rg4 } Be5 10.
>Rf8+ Bb8 11. Re8 Ka7 12. Re7+ Ka8 13. Kb6 Bf4 { Bg3, Bh2 } 14. a7 Be3+ 15. Ka6!
>Bxa7 16. Rxa7+! Kb8 17. Rd7 Kc8 18. Rd5 { Rd4, Rd3, Rd2, Rd1 } Kc7 19. Kb5 Kb7
>20. Rc5 Ka8 { Ka7 } 21. Rc7 { Ka6, Kb6 } Kb8 22. Kb6 Ka8 23. Rc8# 1-0
>
>Moves in braces are equally as good as the move given.
>
>Here is the continuation after the move played in the game, once again with
>colors reversed.
>
> a b c d e f g h
> +---+---+---+---+---+---+---+---+
>8 | |///| |///| |///| |///| 8
> +---+---+---+---+---+---+---+---+
>7 |///| |///| k |///| |///| | 7
> +---+---+---+---+---+---+---+---+
>6 | |///| |/b/| |///| |///| 6
> +---+---+---+---+---+---+---+---+
>5 |///| |///| |///| |///| | 5
> +---+---+---+---+---+---+---+---+
>4 | K |///| |///| |///| |///| 4
> +---+---+---+---+---+---+---+---+
>3 |/P/| |///| |///| |///| | 3
> +---+---+---+---+---+---+---+---+
>2 | |///| |///| |///| |///| 2
> +---+---+---+---+---+---+---+---+
>1 |///| |/R/| |///| |///| | 1
> +---+---+---+---+---+---+---+---+
> a b c d e f g h
Bruce,
Thanks for the reply.
With obstinaty (fighting with a KRPkb?) I made some attempts to make
the King to arrive at the square a8 and, evidently I did not obtain,
for example:
1...Bf4 2.Rc2 Bd6 3.Kb3 Bc7 4.Kc4 Kc8(4...Kc6 5.Rb2 Bb6 6.a4 Kb7 7.a5)
5.Rb2
e for the immediate Bc7
1...Bc7 2.Kb5 Kc8 3.Kc6
Best regards,
Paulo Soares, from Brazil
>
>1. ... Bf4 2. Rc2 { Rc4 } Bd6 3. Kb3 Bg3 { Bc7 } 4. a4 { Rc5, Kc4 } Be1 5. Rc5 {
>Rb2, Kc4 } Kd6 6. Rb5 { Kc4 } Bd2 { Bf2, Kc6 } 7. a5 { Kc4 } Be3 { Kc6 } 8. a6 {
>Rb7, Kc4 } Kc6 9. Rb7 { Kc4, Kb4 } Bb6 10. Re7 { Rf7, Rg7, Rh7, Kc2, Kc4, Kb4 }
>Bc5 { Kc5, Kd6 } 11. a7 { Rf7, Rh7 } Bxa7 12. Rxa7! Kd5 13. Ra5+ { Ra2, Ra1,
>Ra8, Rd7+, Rh7, Kc3 } Kd4 14. Rb5 { Rh5 } Ke3 { Kd3 } 15. Rb4 { Kc4, Kc3 } Kd2 {
>Kd3 } 16. Rd4+ { Kc4 } Ke2 17. Kc2 { Kc4 } Ke3 18. Rc4 { Rb4, Ra4, Kc3 } Kf2 {
>Ke2 } 19. Rc3 { Kd3, Kd2 } Ke1 { Kg1, Kf1, Ke2, Kg2 } 20. Kd3 Kf2 21. Kd2 Kg1 {
>Kf1 } 22. Ke1 { Ke3, Ke2 } Kg2 23. Ke2 Kh1 { Kg1 } 24. Rg3 { Kf1, Kf2 } Kh2 25.
>Kf2 Kh1 26. Rh3# 1-0
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