Catalan Opening failed to break the shackle
The players seem to be very persistent in thorough investigation of the Catalan opening, as the same setup appeared four times when Anand had White pieces.
Once again Topalov switched the variation, and included 4...Bb4+ instead of 4...dxc4. Later on, instead of the almost automatic 8. Qc2, Anand preferred the rare 8. Bf4, which prompted Black to immediately capture the pawn on c4 and then hang on it with b5.
The similar position was seen in the encounter Gelfand-Ivanchuk. Topalov varied from that game by playing 11...Bd7.
Anand accepted the gift in the view of exchange on a8, and the game became highly imbalanced as Black caught up the initiative.
A timely opening of the a-file and breach to the 7th rank gave Anand solid counterplay. After the exchange of the Bishops, it appeared that White managed to stabilise and block the dangerous d-pawn.
Topalov brought his heavy artillery to the 2nd rank, but could not achieve more than perpetual check as White kept the enemy Queen under contact attack.
But Anand refused the possibility of perpetual, on two occasions, and continued to fight for more. Nevertheless, the Black passed pawn demanded lots of caution, and White was unable to gain more with the Knight burdened on f2. The draw was finally agreed on move 58.
Game-7
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