rn3br1/1bqpp1pp/5pkn/ppp5/Q1P2PP1/NP6/P2PP1R1/R1B1KBN1 w Q - 0 12
FEN state: rn3br1/1bqpp1pp/5pkn/ppp5/Q1P2PP1/NP6/P2PP1R1/R1B1KBN1 w Q - 0 12 ; Best move: a3b5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at f8 and black rook at g8. Black bishop at b7, black queen at c7, black pawn at d7, black pawn at e7, black pawn at g7 and black pawn at h7. Black pawn at f6, black king at g6 and black knight at h6. Black pawn at a5, black pawn at b5 and black pawn at c5. White queen at a4, white pawn at c4, white pawn at f4 and white pawn at g4. White knight at a3 and white pawn at b3. White pawn at a2, white pawn at d2, white pawn at e2 and white rook at g2. White rook at a1, white bishop at c1, white king at e1, white bishop at f1 and white knight at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 12. White to move.