32 ... c6-c5 trades a pair of pawns, reducing Black's burden R Hess vs J Becerra-Rivero, 2009  (C69) Ruy Lopez, Exchange, Gligoric Variation, 6.d4, 44 moves, 1-0 Defending is easier if there were no pawns on the queenside J Friedel vs Kaidanov, 2009  (C80) Ruy Lopez, Open, 79 moves, 1-0 CT-3347 M Richter vs M De Verdier, 2010  (E25) Nimzo-Indian, Samisch, 42 moves, 1-0 75 ... a4-a3?? allows rook intercept 76 Rf7-f4+, 77 Rf4-h4 A Rakhmanov vs D Gochelashvili, 2010  (A48) King's Indian, 81 moves, 1-0 CT-4420?? A Stefanova vs P Cramling, 2012  (E56) Nimzo-Indian, 4.e3, Main line with 7...Nc6, 96 moves, 1/2-1/2