White to move...
The goal for white is to promote the e7 pawn into a Queen.
The white King has to move since it is in check. It has 3 possible choices:
1. Kd7 (protecting itself behind the pawn)
Black can now play for a Draw:
1. ... Rf7 (pinning the pawn)
2. Kd8 Rxe7
3. Kxe7 Draw
1. Ke5 (attacking the Rook)
Black can now counter attack the pawn!
1. ... Rf1
2. e8(Q) Re1+
3. Kd6 Rxe8 (Black wins)
1. Kd5 (White is escaping - this is the less obvious move)
Black is chasing the King.
1. ... Rf5+
2. Kd4 Rf4+
3. Ke3 Rf1
No matter what black plays, white can now promote the pawn and win!!
Interesting one, Renaud! The end game combinations are pretty interesting.
Posted by gaurav on April 13, 2008 at 06:22 PM CEST #
gsdfgdsfgsdgsf
Posted by vfdsgs on February 24, 2009 at 11:20 AM CET #
Frank Saavedra did a better version of this puzzle, where the pawn had to underpromote to a rook in order for white to win. The position began with white king on b6, pawn on c6, black king on a1, and black rook on d5. White wins only by 1 c7 Rd6+ 2 Kb5 Rb5+ 3 Kb4 Rd4+ 4 Kb3 Rd3+ 5 Kc2 Rd4 and now only 6 c8=R!! wins. 6 ... Ra4 7 Kb3 Rh4 8 Rc1#. All of white's moves are forced.
Posted by Bob Helix on July 20, 2009 at 04:58 AM CEST #