mate in 2 : 1. ?
White Black
Da Costa 1945
1. Rb3 d4
1. ... e4 2. Nxh5 2. ... Qf5 3. Qxf5 1-0 2. ... Qxc8 3. bxc8=Q 1-0
2. Ne6
2. ... Qf5 3. Bxf5 1-0
2... Qxe6 3. Qxe6 1 - 0