1490-1471: Loss in Samisch Nimzo-Indian
Yesterday's game came after almost a month's break from rated Rapid games on Chess.com. A win would have pushed me over the 1500 mark, and I made sure to have energy, altertness and motivation. 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3 5.bxc3 0-0 6.a4 White allowed the Nimzo-Indian Defense with 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 and led us down the path of the Samisch Variation with 4.a3 . I chopped the pinned knight with 4...Bxc3 , White rechopped with 5.bxc3 , and I castled with 5...0-0 . So far, so book -- although Seirawan in Winning Chess Openings prefers 5...c5 to castles: "Black's strategy is to freeze the c4-pawn so that he might capture it in the future." White had sole possession of the bishop pair, but I was making the case for a lead in development and a healthier pawn structure. Despite having no pieces deployed, White moved his a-pawn a second time with 6.a4 . This move was and is puzzling. Chess.com's game review labels it the best move, but at depth=2...