Improve your endgame technique (training positions)

Practice makes perfect. Here are two technical endgame positions. Both positions are for white to play. Spend 5 minutes assessing each position. I recommend you play from the White's side both positions in 15'+2'' against your favorite chess engine ( Rybka,Fritz,Shredder,Crafty,Fruit 2.1...).

Position I. White to play

Position II, White to play

Both positions come from actual games.