1rb2k1r/p2pqpb1/np1N4/2pPp1pp/1P1PPP2/2B3PP/P7/1RQK1BNR w - - 0 21
FEN state: 1rb2k1r/p2pqpb1/np1N4/2pPp1pp/1P1PPP2/2B3PP/P7/1RQK1BNR w - - 0 21 ; Best move: f4e5
The current state of the chess board is: Black rook at b8, black bishop at c8, black king at f8 and black rook at h8. Black pawn at a7, black pawn at d7, black queen at e7, black pawn at f7 and black bishop at g7. Black knight at a6, black pawn at b6 and white knight at d6. Black pawn at c5, white pawn at d5, black pawn at e5, black pawn at g5 and black pawn at h5. White pawn at b4, white pawn at d4, white pawn at e4 and white pawn at f4. White bishop at c3, white pawn at g3 and white pawn at h3. White pawn at a2. White rook at b1, white queen at c1, white king at d1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. White to move.