rn1q1b1r/1ppkpp2/2bp1nPp/p7/1PP4N/8/P2PPPP1/RNBQKBR1 w Q - 1 10
FEN state: rn1q1b1r/1ppkpp2/2bp1nPp/p7/1PP4N/8/P2PPPP1/RNBQKBR1 w Q - 1 10 ; Best move: b4b5
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black bishop at f8 and black rook at h8. Black pawn at b7, black pawn at c7, black king at d7, black pawn at e7 and black pawn at f7. Black bishop at c6, black pawn at d6, black knight at f6, white pawn at g6 and black pawn at h6. Black pawn at a5. White pawn at b4, white pawn at c4 and white knight at h4. White pawn at a2, 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 1. Full move number is 10. White to move.