Chess

The sides are balanced as far as material goes but white, to play, has spotted a move that will shift the material edge slightly in his favour. Do you see it? Huang – Xu Beijing 2008 1. Bf1! Inviting 1…Bxf1 but black then loses his rook on a4. If instead black plays 1…Ra5 then 2. Bc7 forks black’s two rooks. And if then black tries 2…Nxc7, 3. Rxd8 mating wins for white.