solve this one...


1. Kb5 Rd5+
2. Kb4 Rd4+
3. Kb3 Rd3+
4. Kc2
but there is 5.Rd4 c8/Q
6.Rc4+ Qxc4
stale mate...
This is known as the Saavedra position. A Spanish priest in the late 19th century discovered that this position, which was thought to be a draw is a actually a win for White by underpromotion.
There is a nice video of this analyzed by Josh Specht on www.chessvideos.tv
click on endgame lessons http://chess.about.com/gi/dynamic/offsite.htm?zi=1/XJ/Ya&sdn=chess&cdn=hobbies&tm=17&gps=70_975_1276_631&f=22&su=p445.92.150.ip_&tt=14&bt=0&bts=0&zu=http%3A//rlpchessblog.blogspot.com/