# Endgame Puzzle.

Shinidoki
Posers and Puzzles 03 Aug '06 16:46
1. 03 Aug '06 16:461 edit
This is a position I arrived at in a 3 0 blitz game, I won, playing black with 6 secounds left on my clock.

White has just played 48. Kxg7, had he played 48. a3 White would of won.

assuming best defence, why was Kxg7 a blunder?

Black to play....and win in 8-9 moves (approx)

Good luck.

^^ sorry, don't know how to flip the board ðŸ™‚
2. ark13
Enola Straight
03 Aug '06 17:063 edits
Originally posted by Shinidoki
This is a position I arrived at in a 3 0 blitz game, I won, playing black with 6 secounds left on my clock.

White has just played 48. Kxg7, had he played 48. a3 White would of won.

assuming best defence, why was Kxg7 a blunder?

[fen]8/6K1/4k3/7P/ppp5/2P5/PP6/8 b - - 0 48[/fen]

Black to play....and win in 8-9 moves (approx)

Good luck.

^^ sorry, don't know how to flip the board ðŸ™‚
Black plays b3. If axb3, then c3 bxc3 and white has a3 queening the pawn.

Edit: But black still has to deal with white's h-pawn. Hang on, I'm working on it.

Edit2: white's h pawn will be on the 7th rank, after black queens, with black to move. He uses the standard method of queen vs pawn on 7th rank. Black will win because white has pawn moves that preclude the usually drawing stalemate defense.

Edit3: It looks like a draw to me. I miscounted. They will queen at the same time.

Final lines: 1... b3 2. cxb3 a3 3. bxa3 c3 4. h6 c2 5. h7 c1=Q 6. h8=Q
3. 03 Aug '06 17:13
Originally posted by ark13
Black plays b3. If axb3, then c3 bxc3 and white has a3 queening the pawn.

Edit: But black still has to deal with white's h-pawn. Hang on, I'm working on it.

Edit2: white's h pawn will be on the 7th rank, after black queens, with black to move. He uses the standard method of queen vs pawn on 7th rank. Black will win because white has pawn moves that preclude the usually drawing stalemate defense.
your line is wrong.....After b3 axb3....you state c3, which is not a legal move
4. ark13
Enola Straight
03 Aug '06 17:15
Originally posted by Shinidoki
your line is wrong.....After b3 axb3....you state c3, which is not a legal move
I thought you messed up the diagram, having played both what he did and what he should've. Ignore my post. I thought it supposed to be the standard 3 pawns vs 3 pawns.
5. ark13
Enola Straight
03 Aug '06 17:18
Okay, the solution is a3. If bxa3, then bxc3 queening at the same time as white with a draw. If b3, then the same line holds the draw. It'll probably be a draw by perpetual check.
6. 03 Aug '06 17:251 edit
Originally posted by ark13
Okay, the solution is a3. If bxa3, then bxc3 queening at the same time as white with a draw. If b3, then the same line holds the draw. It'll probably be a draw by perpetual check.
a3. is indeed the right first move, however The game is far from drawn, black does not have to settle for perpectual check.

note: - if your using a computer it will state it is drawn, that is until it can see far enough into the position....
7. BigDoggProblem
Court Jester
03 Aug '06 17:57
Originally posted by Shinidoki
This is a position I arrived at in a 3 0 blitz game, I won, playing black with 6 secounds left on my clock.

White has just played 48. Kxg7, had he played 48. a3 White would of won.

assuming best defence, why was Kxg7 a blunder?

[fen]8/6K1/4k3/7P/ppp5/2P5/PP6/8 b - - 0 48[/fen]

Black to play....and win in 8-9 moves (approx)

Good luck.

^^ sorry, don't know how to flip the board ðŸ™‚
1...a3 2.bxa3 bxc3 3.h6 c2 4.h7 c1=Q 5.h8=Q Qa1+ and Black wins by trading queens and queening the c4 pawn.
8. BigDoggProblem
Court Jester
03 Aug '06 18:03
To help in similar positions, one should learn Hans Kmoch's 'sneaker' trick, and how to stop it.

White to move wins (how?)
Black to move draws (how?)
9. 03 Aug '06 18:09
Korchnoi actually had a very similar position in a game, which he of course won.
10. 03 Aug '06 19:221 edit
Originally posted by BigDoggProblem
1...a3 2.bxa3 bxc3 3.h6 c2 4.h7 c1=Q 5.h8=Q Qa1+ and Black wins by trading queens and queening the c4 pawn.
The solution I had was different.

what I found was: -

1...a3 2.bxa3 bxc3 3.h6 c2 4.h7 c1=Q 5.h8=Q

and Instead of Qa1+ (which also works)

Qg1+ Kh6 [Kh7? Kf7, mate to follow, Kf8 also fails] Qh2+ Kg7 Qg3+ Kh6 [Kf8 Qf4+ Kg7 Qg5+ Kf8 Qe7+ Kg8 Qf7#] Qh4+ [Kg7 Qg5+ 0-1] Kg6 Qxh8 -- winning the Queen.

But....48. Kxg7 a3 49. bxa3 b3 50. axb3 cxb3 51. h6 b2 52. h7
b1=Q 53. h8=Q Qg1+ 54. Kf8 Qf2+ 55. Ke8 Qf7+ 56. Kd8 Qd7#
0-1 ....was the line played in the blitz game.
11. BigDoggProblem
Court Jester
03 Aug '06 20:44
Originally posted by Shinidoki
The solution I had was different.

what I found was: -

1...a3 2.bxa3 bxc3 3.h6 c2 4.h7 c1=Q 5.h8=Q

and Instead of Qa1+ (which also works)

Qg1+ Kh6 [Kh7? Kf7, mate to follow, Kf8 also fails] Qh2+ Kg7 Qg3+ Kh6 [Kf8 Qf4+ Kg7 Qg5+ Kf8 Qe7+ Kg8 Qf7#] Qh4+ [Kg7 Qg5+ 0-1] Kg6 Qxh8 -- winning the Queen.

But....48. Kxg7 a3 49. bxa3 b3 50. axb3 c ...[text shortened]... 8=Q Qg1+ 54. Kf8 Qf2+ 55. Ke8 Qf7+ 56. Kd8 Qd7#
0-1 ....was the line played in the blitz game.
I'd hate to have to calculate all the lines like 5...Qg1+ 6.Kf8. You say it fails (and it must, because at the very least, Black can still trade Queens), but I'm not sure I could find how it fails with only 6s left.

5...Qa1+, on the other hand, requires no real calculation. It's nice and simple.
12. 03 Aug '06 22:56
Originally posted by BigDoggProblem
I'd hate to have to calculate all the lines like 5...Qg1+ 6.Kf8. You say it fails (and it must, because at the very least, Black can still trade Queens), but I'm not sure I could find how it fails with only 6s left.

5...Qa1+, on the other hand, requires no real calculation. It's nice and simple.
With 6 secounds on the clock - I could barely find mate in 2, let alone that complex sequence - nonetheless, I like that solution, I find it a pity that a far simpler, just as good, solution exists.
13. 08 Aug '06 21:17
a3 wins im not in the mood to post the variation but i does