karlzen: Since Kosteniuk just turned GM I thought it would be an idea to analyse a great win against her main rival, Stefanova. It is a very nice example of punishing the opponent for making an ugly move (here Qe2?).Black follows up beautifully and this could possibly be a daily puzzle (starting with 12...Nxd4!) but I'm not so sure since white can probably save herself with 19.exd4 which is just slightly better for black.
After 19.Bg3? however, there's no saving move for white. 21.Be5 is another mistake, although not very obvious, 21.Bb1 is better but black must be winning still. After the game continuation 21.Be5?! Nxd3 22.Kxd3 Rh7!! 23.Rxa7?! Bb5+ 24.Kd2 black blew the win (although she was lucky to score the full point later on anyway) by playing Bc5-b4+ instead of the immediate 24...Bb4+! 25.Kd1 (and this position could certainly be up for "daily puzzle") 25...g4!!.
This move looks like nothing at a first glance but analysis shows that black is now threatening mate by ...f6!!, Rxh7 Ba4+, Ke2 Rc2+, Kd1 Rxf2+, Kc1 Ba3+ and it's soon over. To stop this white has to give up a lot of material and since she's so underdeveloped on the kingside it is already resignable. On 26.g3 black still has 26...f6 and when the white king crawls to g2 black finishes the game by 30...Bd3! which threatens both the white rook which is now at h7 as well as Be4+ and mate on the first rank (or Bxh1 winning).
sac: 12...Nxd4
