What is the fine-grained topic of the following text: 1 Nf3 Nf6 2 c4 g6 3 g3 Bg7 4 Bg2 0-0 5 d4 d6 6 0-0 Nbd7 7 Nc3 e5 8 e4 c6 9 h3 Qa5 10 Re1 exd4 11 Nxd4 Ne5 12 Bf1 Qb6 13 Be3 c5 Not 13 … Qxb2 as then 14 Na4 Qb4 15 Bd2 Qa3 16 Re3 traps the queen. Only return the topic.
Chess strategy