rnbq3r/ppppb2p/4pk2/6p1/1P1N4/N1P2pP1/P1QP1P1P/1RB1KB1R w K - 0 15
FEN state: rnbq3r/ppppb2p/4pk2/6p1/1P1N4/N1P2pP1/P1QP1P1P/1RB1KB1R w K - 0 15 ; Best move: d4f3
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at d8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at c7, black pawn at d7, black bishop at e7 and black pawn at h7. Black pawn at e6 and black king at f6. Black pawn at g5. White pawn at b4 and white knight at d4. White knight at a3, white pawn at c3, black pawn at f3 and white pawn at g3. White pawn at a2, white queen at c2, white pawn at d2, white pawn at f2 and white pawn at h2. White rook at b1, white bishop at c1, white king at e1, white bishop at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 0. Full move number is 15. White to move.