r1b2bnr/p1pq1kp1/2np1p1p/4p2P/1p2P2R/PPP2P2/3PN1P1/RNBQKB2 w Q - 3 10
FEN state: r1b2bnr/p1pq1kp1/2np1p1p/4p2P/1p2P2R/PPP2P2/3PN1P1/RNBQKB2 w Q - 3 10 ; Best move: a3b4
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 king at f7 and black pawn at g7. Black knight at c6, black pawn at d6, black pawn at f6 and black pawn at h6. Black pawn at e5 and white pawn at h5. Black pawn at b4, white pawn at e4 and white rook at h4. White pawn at a3, white pawn at b3, white pawn at c3 and white pawn at f3. White pawn at d2, white knight at e2 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 and white bishop at f1. White queenside is the only castle move available. Half move number is 3. Full move number is 10. White to move.