r1k3nr/4pp2/p3bbpp/nppp3B/5N1P/3QP3/PP1P2P1/RNB1KR2 w Q - 2 21
FEN state: r1k3nr/4pp2/p3bbpp/nppp3B/5N1P/3QP3/PP1P2P1/RNB1KR2 w Q - 2 21 ; Best move: f4e6
The current state of the chess board is: Black rook at a8, black king at c8, black knight at g8 and black rook at h8. Black pawn at e7 and black pawn at f7. Black pawn at a6, black bishop at e6, black bishop at f6, black pawn at g6 and black pawn at h6. Black knight at a5, black pawn at b5, black pawn at c5, black pawn at d5 and white bishop at h5. White knight at f4 and white pawn at h4. White queen at d3 and white pawn at e3. White pawn at a2, white pawn at b2, white pawn at d2 and white pawn at g2. White rook at a1, white knight at b1, white bishop at c1, white king at e1 and white rook at f1. White queenside is the only castle move available. Half move number is 2. Full move number is 21. White to move.