r1b2bnr/p1pqpk2/3p3p/1pn5/P7/2P2N2/1P1PPPP1/RNBQKBR1 w Q - 2 9
FEN state: r1b2bnr/p1pqpk2/3p3p/1pn5/P7/2P2N2/1P1PPPP1/RNBQKBR1 w Q - 2 9 ; Best move: a4b5
The current state of the chess board is: Black rook at a8, black bishop at c8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at c7, black queen at d7, black pawn at e7 and black king at f7. Black pawn at d6 and black pawn at h6. Black pawn at b5 and black knight at c5. White pawn at a4. White pawn at c3 and white knight at f3. White pawn at b2, white pawn at d2, white pawn at e2, white pawn at f2 and white pawn at g2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1, 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 2. Full move number is 9. White to move.