|notyetagm: FINAL POSITION
36 ... ♗d8-h4 0-1
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<<<Topalov can freely aim at targets with his rook and bishop, whereas Svidler has nothing to aim for.>> 35.Ke3 The worst place he could of put his king, but his position was dodgy anyway. 35...Ra3+ 36.Kd2 Bh4<< and whites pawns are a tumbling down.>> 0-1>
Exactly. White simply has too many <WEAK PAWNS>, or as Capablanca would say, too many <PAWN ISLANDS>.
White has only one pawn that can be defended by other pawns, the White e5-pawn. That means that he has four, count'em four(!) pawn chain bases that must be defended by the White pieces: the d4-pawn, double+isolated f-pawns, and the isolated h-pawn.
Black on the other hand (after sac'ing the b-pawn), can play ... h6-h5 and have only one(!) <PAWN ISLAND>, with only one weakness, the <PAWN CHAIN BASE> the Black f7-pawn.
So the target/weakness count would be:
It's no wonder Svidler resigned early here. This endgame would be pure torture.
In short, Svidler resigned because of his multiple <PAWN WEAKNESSES>. A textbook example of this type of weakness and how simply having <WEAK PAWNS> can lead even 2700-level players to defeat.