Your judgement, please - Pt. 31

Retirado do site Chessbase.com.

Malakhov and his Slav with 4...a6
09.12.2009 – Vladimir Malakhov is the man of the hour at the World Cup in Khanty Mansiysk. Having beaten his opponents (Smirin, Eljanov and So) in rapid chess, he went on to defeat Peter Svidler in normal chess with the black pieces - and once again with his beloved 4...a6 Slav (which had already downed Pavel Eljanov and Wesley So). Incidentally, the discussed variation - 5.e3 b5 6.c5 g6 - was extensively analysed by Dorian Rogozenco in his contribution for CBM 119. Rainer Knaak has annotated this game.
Svidler-Malakhov on ChessBase Magazine Online...

Svidler-Malakhov, position after 7.Bd3

Your judgement, please - Pt. 30

Retirado do site Chessbase.com.

A mate attack out of the blue
09.12.2009 – Today will see the first game of the final Gelfand-Ponomariov at the World Cup in Khanty-Mansiysk. Opportunity for us to look back on an exciting moment from the endgame Karjakin-Mamedyarov. The latter has just played 49...Rb2? (diagram), thus giving his young opponent the unexpected chance to decide the game by mating threats. Which surprising move helped the 19-year-old Ukraine to secure victory now? Use this larger diagram to work it out for yourself. Grandmaster Karsten Müller has analysed the endgame Karjakin-Mamedyarov for ChessBase Magazine Online.

Position after 49...Rb2? How did Karjakin continue?