Doubled pawns
Doubled pawns are usually weak and immobile, thus exposed to attack. In this game, Fischer doubles White�s pawns, but in doing so gives up his valuable kingside Bishop. If Black can survive the attack, then he will win because of his superior pawn structure.
Miguel Quinteros-Robert Fischer
Buenos Aires 1970
1.c4 g6 2.Nc3 Bg7 3.Nf3 c5 4.d4 cxd4 5.Nxd4 Nc6 6.Nc2 Bxc3+ 7.bxc3 Nf6 8.f3 d6 9.e4 Be6
Black starts to pressure the isolated doubled c-pawns. However, White has compensation in Black's missing King Bishop, which means Black will permanently have problems with King safety.
10.Be2 Rc8 11.Ne3 Qa5 12.Bd2 Ne5 13.Qb3 Nfd7 14.f4 Nc5 15.Qc2 Nc6 16.O-O Qa4 17.Qb1
White must clearly avoid a Queen exchange, which would eliminate his attacking chances.
17...Na5 18.e5 dxe5 19.fxe5 O-O
There is no hurry to win the weak c4-pawn.
20.Rf4 Nd7 21.Nd5 Rfe8 22.Qe4 b5 23.Rxf7
White must attack. Otherwise his position will collapse.
23...Kxf7
Not 23...Bxf7? 24.e6.
24.Qh4 Kg7 25.Nxe7
Threatening 26.Qh6+ Kh8 27.Nxg6+.
25...Qc2 26.Qh6+ Kh8 27.Rc1
Winning the Queen as 27...Qe4? is met with 28.Bf3, but...
27...Qxc1+
Black gets more than enough material for the Queen.
28.Bxc1 Rxe7 29.cxb5 Nc4 30.Qh4 Rf7 31.Qd4 Kg8 32.Bf4 Rc5
33.Bf3 Rxb5 34.h3 Ncxe5 35.Ba8 Rf8 36.Bxe5 Nxe5 37.Qxa7 Bd5 38.Bxd5+
Rxd5 39.Qe3 Ra5 40.Qe2 Rfa8 41.a4 Nf7 42.h4 Rxa4 0-1
Black will soon double his Rooks on the 7th rank.