Originally posted by PrashantAfter 1.b4 black cannot maintain opposition. That means he will have to let the white king approach his pawn, and lose it (the b4-pawn covers two defending squares). It then is K+2 connected pawns against K. Black will not be able to block white or keep the position with the king on the 7th rank. Easy win (stalemate tricks to be avoided).
If I am not wrong, Black can still draw after 1. b4. (by controlling a7, b7, c7) can some one try win for white and draw for black after 1. b4
1 edit
Originally posted by Prashant[Event "?"]
If I am not wrong, Black can still draw after 1. b4. (by controlling a7, b7, c7) can some one try win for white and draw for black after 1. b4
[Site "?"]
[Date "2005.12.03"]
[Round "?"]
[White "Wulebgr"]
[Black "Hiarcs 9"]
[Result "1-0"]
[Annotator "Hiarcs 9 (15s)"]
[SetUp "1"]
[FEN "8/8/8/1p1k4/8/1PPK4/8/8 w - - 0 1"]
[PlyCount "47"]
[SourceDate "2003.01.01"]
1. b4 Ke5 2. c4 Kd6 3. c5+ Kd5 4. Kc2 Kc6 5. Kc3 Kd5 6. Kd3 Ke5 7. Ke3 Kd5 8.
Kf4 Kc6 9. Ke5 Kc7 10. Kd5 Kb7 11. c6+ Kc8 12. Kc5 Kc7 13. Kxb5 Kd6 14. Kb6 Ke7
15. c7 Kd7 16. Kb7 Kd6 17. c8=Q Ke5 18. Qg4 Kf6 19. Kc6 Ke5 20. Kc5 Kf6 21. Kd6
Kf7 22. Qg5 Kf8 23. Ke6 Ke8 24. Qg8# (24. Qe7# ) 1-0
Originally posted by WulebgrMy reasoning was more like 11.Kd6 and winning the b-pawn (threatening to promote the c-pawn), but this is equally good.
[Event "?"]
[Site "?"]
[Date "2005.12.03"]
[Round "?"]
[White "Wulebgr"]
[Black "Hiarcs 9"]
[Result "1-0"]
[Annotator "Hiarcs 9 (15s)"]
[SetUp "1"]
[FEN "8/8/8/1p1k4/8/1PPK4/8/8 w - - 0 1"]
[PlyCount "47"]
[SourceDate "2003.01.01"]
1. b4 Ke5 2. c4 Kd6 3. c5+ Kd5 4. Kc2 Kc6 5. Kc3 Kd5 6. Kd3 Ke5 7. Ke3 Kd5 8.
Kf4 Kc6 9. ...[text shortened]... 8. Qg4 Kf6 19. Kc6 Ke5 20. Kc5 Kf6 21. Kd6
Kf7 22. Qg5 Kf8 23. Ke6 Ke8 24. Qg8# (24. Qe7# ) 1-0
Originally posted by Mephisto2after 2... bxc4 3.Kxc4 Kd6 4.Kb5 Kc7 5.Ka6 Kb8, an interesting position is reached.
My reasoning was more like 11.Kd6 and winning the b-pawn (threatening to promote the c-pawn), but this is equally good.
It comes down to a tempo. The black king can shuffle between b8 and a8, but the white pawn reaches b7 at exactly the right time.
Originally posted by WulebgrThis falls under the rule, "With King on the 6th rank, in front of the pawn, the stronger side always wins". It does not matter where the black King starts in this position, making 'tempo' considerations irrelevant.
after 2... bxc4 3.Kxc4 Kd6 4.Kb5 Kc7 5.Ka6 Kb8, an interesting position is reached.
[fen]1k6/8/K7/8/1P6/8/8/8 w - - 0 6[/fen]
It comes down to a tempo. The black king can shuffle between b8 and a8, but the white pawn reaches b7 at exactly the right time.
Originally posted by BigDoggProblemThanks for the clarification. What was I thinking? 🙄
This falls under the rule, "With King on the 6th rank, in front of the pawn, the stronger side always wins". It does not matter where the black King starts in this position, making 'tempo' considerations irrelevant.
The win with best play is using a strategy known as "turning his flank":
1.b4 Ke5 2.c4 Kd6 3.c5+ Kd5 4.Ke3 Ke5 5.Kf3 Kf5 6.Kg3
Black's flank has been turned...he can't continue to hold the opposition because it would put his K outside the queening square.
Ke5 7.Kg4 Ke6 8.Kf4 Kf6 9.Ke4 Ke6 10.Kd4 Kd7 11.Kd5