Wow ! This is brilliant ! I don’t even know the Rule. Is it possible for the Black King to move into the check of the ‘a’ Pawn, because the a Pawn is pinned by the Black rook ?
1.Kb5 Bxc5! a) 2.Kxc5 ? Rc8+! 3.Kb5 e2! 4.b7 e1Q 5.bxc8Q+ Kxc8 6.a8Q+ Kd7 7.Qc6+ Ke7 – draw. b) 2.b7 Rxa7 3.b8Q+ Kd7! / 4.Qf4 ? Rc7! 5.Qf7+ Kc8 – and black’s fortress is unbreakable. / 4.Kxc5 Rc7+ – and if white has less than 5 min left the win just slips away.
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Hi Susan Polgar,
Ref : “Unusual endgame”[White to move]
Sub : White wins the game.
White’s initial move “b7”,any combination there on will lead the White to win the game.
One lengthy Example.
=================
1. b7 Bc5
2. b*Ra8+(Q) Kd7
3. Qd5+ Ke8
4. Q*Bc5 e2
5. Qe5+ Kf7
6. Q*e2 Kf6
7. a8(Q) Kf5
8. Qf8+ Kg5
9. Qg2+ Kh5
10.Qh8+ mate
White wins the game : 1- 0
By
Venky[Chennai – India]
1.Kb5! is winning
1.Kb5! wins
A)1…e2 2.b7 +-
B)1…Kc8 2.Kc6 +-
C)1…Bxc5 2.b7 +-
white wins after Kb5 there is nothing left for blakc ( he is beeing tempo out whites promotion cant be stopped! Greets everybody
Bxc5 wins according to me ….
1. b7? R:a7+ 2. K:a7 B:c5+ 3. Ka8 Bd6 wins for black.
1. Kb7? B:c5 2. K:a8 B:b6 and 3…B:a7 also wins for black.
So it looks like it is necessary to guard c5.
1. Kb5 e2 2. b7 R:a7 3. b8Q+ Ke7 4. Q:a7+ and 5. Qa1 wins.
1. Kb5 Ke7 2. b7 R:a7 3. b8Q looks like the best I can find for black. But 3… Ra3 (else 4. Qe5+) 4. c6 looks winning for white.
Kb5 Kc8 Ka6 Kd8 Kb5 Kc8 Ka6 Kd8 etc.
Wow ! This is brilliant ! I don’t even know the Rule. Is it possible for the Black King to move into the check of the ‘a’ Pawn, because the a Pawn is pinned by the Black rook ?
Brilliant problem, Susan !
What is the rule, though ?
these end game stuff are always difficult…
A)
1. b7 loses to 1…Rxa7+ 2.Kxa7 Bxc5+ 3.Ka8 Bd6 – all forced moves and black wins
B)
1. Kb7 draws for white…
1… e2 2.Kxa8 e8=Q 3. b7 Qe4 pinning the king and next leads to perpetual checks…
C)
1. c6 e2
( 2.b7 loses for white similar to option A)
2. Kb7 e8=Q 3.Kxa8 Qe4
Now, 4.Kb7 leads to 4…Qe2+ and to draw via perpetual or stalemate.
4.b7 leads to 4…Qxc6 and the same drawish situation
4.Kb8 I think wins…
hmm…4) Kb8 also draws with 4…Qxc6
White must be very careful:
1.Kb5 Bxc5!
a) 2.Kxc5 ? Rc8+! 3.Kb5 e2! 4.b7 e1Q 5.bxc8Q+ Kxc8 6.a8Q+ Kd7 7.Qc6+ Ke7 – draw.
b) 2.b7 Rxa7 3.b8Q+ Kd7! / 4.Qf4 ? Rc7! 5.Qf7+ Kc8 – and black’s fortress is unbreakable. /
4.Kxc5 Rc7+ – and if white has less than 5 min left the win just slips away.
A fascinating endgame !
Not..
1.b7 RxP+
2.KxR BxP+
3.Ka8 Bd6
0-1
So…
1.Kb5! Bxc
2.KxB e2
3.b7 e1=Q
4.PxR=Q+ Ke7
5.Qb7+ Kf6
6.Qc6+ Kf5
7.a8=Q
1-0
Hi Susan Polgar,
Very nice,as I said earlier,this blog has brilliant minds.
My earlier suggested moves for this puzzle[Initial move “b7”] got squarely stumped by brilliant minds in this blog.I have over looked forced moves.
Kudos to all those who have suggested correct moves.
Let me buck up my concentration.
By
Venky[Chennai – India]