r1bq3r/p1ppkppp/1p1b1n2/1B2p3/1n1PPN2/P4Q1P/1PP2PP1/RNB1KR2 w Q - 3 12
FEN state: r1bq3r/p1ppkppp/1p1b1n2/1B2p3/1n1PPN2/P4Q1P/1PP2PP1/RNB1KR2 w Q - 3 12 ; Best move: a3b4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8 and black rook at h8. Black pawn at a7, black pawn at c7, black pawn at d7, black king at e7, black pawn at f7, black pawn at g7 and black pawn at h7. Black pawn at b6, black bishop at d6 and black knight at f6. White bishop at b5 and black pawn at e5. Black knight at b4, white pawn at d4, white pawn at e4 and white knight at f4. White pawn at a3, white queen at f3 and white pawn at h3. White pawn at b2, white pawn at c2, white pawn at f2 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 3. Full move number is 12. White to move.