39 Ng3-f5! attacks defender of f7-pawn and f7-CHECKING SQUARE Carlsen vs Grischuk, 2010  (D38) Queen's Gambit Declined, Ragozin Variation, 41 moves, 1-0 20 Rd1-d6! blocks guard line to e6-bishop, e6-checking square Aronian vs Smeets, 2010  (D10) Queen's Gambit Declined Slav, 37 moves, 1-0 54 Rd6-d5! blocks guard line to e5-knight, e5-pinning square Anand vs Shirov, 2010  (C78) Ruy Lopez, 55 moves, 1-0 24 Rd1-d5! blocks guard line to c5-knight, c5-pinning square Aronian vs Shirov, 2011  (D52) Queen's Gambit Declined, 53 moves, 1-0 Carlsen vs C Ward, 2003  (E21) Nimzo-Indian, Three Knights, 39 moves, 1-0 5 games