Author: Bruce Moreland
Date: 10:06:15 01/31/99
Go up one level in this thread
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
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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