CHESS SOLUTION
1 ... Nd7?? (Bb7 or g6 are safe ways to maintain equality) 2 0-0-0! attacks both b2 and d7, so gained material that eventually proved decisive.
1 ... Nd7?? (Bb7 or g6 are safe ways to maintain equality) 2 0-0-0! attacks both b2 and d7, so gained material that eventually proved decisive.