rn2kbn1/4ppp1/p1P2qbr/1p1p1P1B/6P1/P2PP2N/2P3QP/RNB1K2R w q - 3 18
FEN state: rn2kbn1/4ppp1/p1P2qbr/1p1p1P1B/6P1/P2PP2N/2P3QP/RNB1K2R w q - 3 18 ; Best move: f5g6
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at e7, black pawn at f7 and black pawn at g7. Black pawn at a6, white pawn at c6, black queen at f6, black bishop at g6 and black rook at h6. Black pawn at b5, black pawn at d5, white pawn at f5 and white bishop at h5. White pawn at g4. White pawn at a3, white pawn at d3, white pawn at e3 and white knight at h3. White pawn at c2, white queen at g2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white king at e1 and white rook at h1. Black queenside is the only castle move available. Half move number is 3. Full move number is 18. White to move.