white to play and win

aginis
Posers and Puzzles 22 Jun '06 16:24
1. 22 Jun '06 16:241 edit
white to play and win

2. 22 Jun '06 16:52
Originally posted by aginis
white to play and win

[fen]8/p7/P4p2/3K1P2/5k2/8/8/8[/fen]
Correct me if I'm wrong but I think this one is simple.

1. Kc6 Kf5
2. Kb7 Ke5
3. Ka7 f5
4. Kb7 f4
5. a7 f3
6. a8=Q f2
then it is just K Q vs. K p, easy checkmate
3. BigDoggProblem
22 Jun '06 16:52
Originally posted by aginis
white to play and win
Hmm. I don't see why White can't just promote the a-pawn and win. Black can only get his f-pawn to f3, which doesn't seem far enough to draw. White can often force a position such as the following:

...where Black can make no progress. ...Kg2 or f2 prevents the pawn from advancing; ...f2 allows Qh1-f1, blockading the pawn and winning.
4. 22 Jun '06 16:57
Originally posted by hypothetical
Correct me if I'm wrong but I think this one is simple.

1. Kc6 Kf5
2. Kb7 Ke5
3. Ka7 f5
4. Kb7 f4
5. a7 f3
6. a8=Q f2
then it is just K Q vs. K p, easy checkmate
well black being an intelligent fellow sees what you see and doesn't chomp the pawn.

1.Kc6 Ke5!
5. 22 Jun '06 17:12
Originally posted by aginis
well black being an intelligent fellow sees what you see and doesn't chomp the pawn.

1.Kc6 Ke5!

1. Kc6 Ke5
2. Kb7 Kd6
3. Kb8 Kc6
4. Kc8 Kb6
5. Kd8 Kc6
6. Ke7 Kd5
7. Kf6 Kd6
8. Kg6 Ke7
9. f6+ Ke6
10. f7 Ke7
11. Kg7 Kd8
12. f8=Q+
then it is K Q p vs. K p, easy checkmate. Am I right this time?
6. 22 Jun '06 17:301 edit
Originally posted by hypothetical

1. Kc6 Ke5
2. Kb7 Kd6
3. Kb8 Kc6
4. Kc8 Kb6
5. Kd8 Kc6
6. Ke7 Kd5
7. Kf6 Kd6
8. Kg6 Ke7
9. f6+ Ke6
10. f7 Ke7
11. Kg7 Kd8
12. f8=Q+
then it is K Q p vs. K p, easy checkmate. Am I right this time?
5...Kc6? is wishful thinking

5...Kxa6
6.Ke7 Kb5
7.Kxf6 a5
8.Ke5 a4
9.Kd4 (9.f6 a3 f7 a2 f8=Q a1=Q draw)
9...a3! (Kb4?? f6 a3 f7 a2 f8=Q+!! Kb3 Qb8+ Kc2 Qc7+ Kb1 Kd3! a1=q Qc2++)
10.Kc3 a2
11.Kb2 a1=q+
12.Kxa1 Kc5 =

7. 22 Jun '06 17:361 edit
1.Kc6 Ke5!
2.Kc7! and now

2. ... Kd5
3.Kd7 Ke5 (Kc5? 4.Ke6 wins with the f-pawn)
4.Kc6! and now black cannot reach c7 when the white king grabs the a-pawn

2. ... Kxf5
3.Kb8 (or Kb7) and wins with the a-pawn
8. 22 Jun '06 17:56
have you seen this puzzle previously?
9. 22 Jun '06 18:04
Not that I recall. But the black king maneuvre is well known. Once white is aware of the threat (Kxa7? Kc7!) then its only a matter of counting and using the white f-pawn to prevent black from maintaining opposition.
10. 22 Jun '06 19:161 edit
ok heres another

also white to play and win