r2k1bnr/pb3pp1/1P3q1p/2pp4/5pP1/2PP1N2/PBQ1P2P/RN2KBR1 w Q - 0 12
FEN state: r2k1bnr/pb3pp1/1P3q1p/2pp4/5pP1/2PP1N2/PBQ1P2P/RN2KBR1 w Q - 0 12 ; Best move: b6a7
The current state of the chess board is: Black rook at a8, black king at d8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black bishop at b7, black pawn at f7 and black pawn at g7. White pawn at b6, black queen at f6 and black pawn at h6. Black pawn at c5 and black pawn at d5. Black pawn at f4 and white pawn at g4. White pawn at c3, white pawn at d3 and white knight at f3. White pawn at a2, white bishop at b2, white queen at c2, white pawn at e2 and white pawn at h2. White rook at a1, white knight at b1, white king at e1, white bishop at f1 and white rook at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 12. White to move.