1. g1f3 Ivanchuk played 1.c4 and 1.e4 in his two previous games with White in the match. He has always been a very versatile opening player with encyclopedic knowledge. 1... d7d5  2. g2g3  2... g7g6  3. f1g2  3... f8g7  4. d2d4  4... g8f6  5. e1g1  5... c7c6 