r1b1kb2/pB1pn2r/1p4q1/n1p1pppp/1P3N2/B3PP2/PNPP2PP/R2QK2R w q - 5 16
FEN state: r1b1kb2/pB1pn2r/1p4q1/n1p1pppp/1P3N2/B3PP2/PNPP2PP/R2QK2R w q - 5 16 ; Best move: f4g6
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black bishop at f8. Black pawn at a7, white bishop at b7, black pawn at d7, black knight at e7 and black rook at h7. Black pawn at b6 and black queen at g6. Black knight at a5, black pawn at c5, black pawn at e5, black pawn at f5, black pawn at g5 and black pawn at h5. White pawn at b4 and white knight at f4. White bishop at a3, white pawn at e3 and white pawn at f3. White pawn at a2, white knight at b2, white pawn at c2, white pawn at d2, white pawn at g2 and white pawn at h2. White rook at a1, white queen at d1, white king at e1 and white rook at h1. Black queenside is the only castle move available. Half move number is 5. Full move number is 16. White to move.