Chess puzzle (Checkmate)
Opening: Nimzo-Indian_Defense, Nimzo-Indian_Defense_Samisch_Variation
Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. f3 b6 7. Bg5 Bb7 8. e4
d6 9. e5 dxe5 10. dxe5 Qxd1+ 11. Rxd1 Nfd7 12. Be2 Nxe5 *
Position (FEN): rn2k2r/pb3ppp/1p2p3/2p1n1B1/2P5/P1P2P2/4B1PP/3RK1NR w Kkq - 0 13
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 523
Best move: Rd8#