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1. 20 Jul '06 15:58
This should be fun for all.See an intresting puzzle or study?Post it here

White to move.Does white win,lose or draw?And show us how you think it should go,of course.

2.  DeepThought
Losing the Thread
20 Jul '06 17:21
1. b7 wins by force, after 1. b7 f2 2. bxa8 = Q (and not 2. Rf8 Nd2+) f1=Q 3. Qe5+ white can force the exchange of queens for an easy endgame.
3. 20 Jul '06 17:24 / 1 edit
Originally posted by DeepThought
1. b7 wins by force, after 1. b7 f2 2. bxa8 = Q (and not 2. Rf8 Nd2+) f1=Q 3. Qe5+ white can force the exchange of queens for an easy endgame.
What about 1....Nd7 or c6 check?
4. 20 Jul '06 17:27
Originally posted by DeepThought
1. b7 wins by force, after 1. b7 f2 2. bxa8 = Q (and not 2. Rf8 Nd2+) f1=Q 3. Qe5+ white can force the exchange of queens for an easy endgame.
Nope.1.b7,Nc6+ followed by Rxd8 and white's dead.
5. 20 Jul '06 17:27 / 1 edit
Umm b7 looses instantly to Nc6+.Oups someone beat me to it.
6. 20 Jul '06 18:39
Originally posted by omulcusobolani
Umm b7 looses instantly to Nc6+.Oups someone beat me to it.
1.b7 is as good as any other move. black wins in all variations.

1.Kd6 axb6! (not f2?? Re8+ Kd1 Rf8 = or f2?? Re8 Kf1 b7 +-)
1.b7 Nc6+ 2.Kd6 Rxd8+ 3.Kxc6 f2 4.Kc7 Rf8 5.b8=Q Rxb8 6.Kxb8 f1=q 7.Kxa7 Qb5 8.d5 Qxd5 9.Kb8 Qb5+ 10.Ka7 Kd2 -+
1.d5! Nc6+!! (not axb6 a7 Rxa7 Rxb8 Ra6 d6 f2 d7 f1=q d8=q with complications. or 1...Nc7+ 2.Rxc7 axb6 3.Rb7 Rxa6 4.d6 f2 d7 f1=q d8=q with similar complications) 2.dxc6 Rxd8 3.c7 Re8+ 4.Kd6 axb6 5.Kd7 Ra8 6.c8=Q Rxc8 7.Kxc8 f2 8.Kb7 f1=q -+

all other moves black should win easily.
7. 20 Jul '06 20:45
Originally posted by aginis
1.b7 is as good as any other move. black wins in all variations.

1.Kd6 axb6! (not f2?? Re8+ Kd1 Rf8 = or f2?? Re8 Kf1 b7 +-)
1.b7 Nc6+ 2.Kd6 Rxd8+ 3.Kxc6 f2 4.Kc7 Rf8 5.b8=Q Rxb8 6.Kxb8 f1=q 7.Kxa7 Qb5 8.d5 Qxd5 9.Kb8 Qb5+ 10.Ka7 Kd2 -+
1.d5! Nc6+!! (not axb6 a7 Rxa7 Rxb8 Ra6 d6 f2 d7 f1=q d8=q with complications. or 1...Nc7+ 2.Rxc7 axb6 3.Rb7 Rxa6 4.d6 ...[text shortened]... 6 axb6 5.Kd7 Ra8 6.c8=Q Rxc8 7.Kxc8 f2 8.Kb7 f1=q -+

all other moves black should win easily.
Nope,black doesn't win,white has a better move
8. 20 Jul '06 20:50
Originally posted by Gorgar
Nope,black doesn't win,white has a better move
are you sure?
9. 20 Jul '06 23:02 / 1 edit
Originally posted by aginis
are you sure?
Absolutely
Since there isn't much intrest I'll give you the first move and objective.
White draws after 1.Ke4
10. 21 Jul '06 08:51
Originally posted by Gorgar
Absolutely
Since there isn't much intrest I'll give you the first move and objective.
White draws after 1.Ke4
1.Ke4 f2 2.b7! f1=Q 3.bxa8=q Qg2+! 4.Ke3!! Qxa8 5.d5! and now white simply maintains the opposition.
i missed 5.d5 the first time around and then i missed 4.Ke3 the second time around.
11. 21 Jul '06 09:54
Originally posted by aginis
1.Ke4 f2 2.b7! f1=Q 3.bxa8=q Qg2+! 4.Ke3!! Qxa8 5.d5! and now white simply maintains the opposition.
i missed 5.d5 the first time around and then i missed 4.Ke3 the second time around.
Exactly!It's a study by Somov-Nasimovich 1938.
12. 21 Jul '06 11:14
Another great escape.
White to move draws.
13. 21 Jul '06 12:45
Originally posted by Gorgar
Another great escape.
White to move draws.
[fen]8/6B1/8/2K5/2p1kppp/2P5/2P2PP1/8 w - - 0 1[/fen]
Clearly white must address the threat of h3

The only way i can see to do that is
1. Bd4 h3
2. f3+ gxf3
3. gxf3+ Kxf3
4. Bf4
14. 21 Jul '06 12:48 / 2 edits
Originally posted by zebano
Clearly white must address the threat of h3

The only way i can see to do that is
1. Bd4 h3
2. f3+ gxf3
3. gxf3+ Kxf3
4. Bf4
i think you mean
1.Bd4 h3?
2.f3+gxf3
3.gxh3! any
4.Bf2 +-

More interesting of course is
1.Bd4 f3!
2.g3!? (2.gxf3+ Kxf3 3.Kxc4 h3 4.Be5 Kxf2 5.Kd3 g3 6.c4 h2 7.c3 h1=Q -+)
2...h3
3.Kxc4 h2
4.Kb3 h1=q
5.Kb2 Qe1
6.Bc5 Kd5
7.Bb6 Kc4
8.Bd4 Qd2!! (triangulation for zugzwang)
9.Kb1 (Ka2 Qc1 any Qxc2+ and wins.)
9...Qd1+
10.Kb2 Qe1 (zugzwang)
11.Ka2 Qc1
12.any Qxc2+ -+
15. 21 Jul '06 13:48
Originally posted by aginis
i think you mean
1.Bd4 h3?
2.f3+gxf3
3.gxh3! any
4.Bf2 +-
4 ... h2 wins for black.