1r2k1nr/3nppb1/q2p2p1/p1P4p/1p2P1PP/N5B1/PPP1NP2/1R2K2b w k - 2 23
FEN state: 1r2k1nr/3nppb1/q2p2p1/p1P4p/1p2P1PP/N5B1/PPP1NP2/1R2K2b w k - 2 23 ; Best move: a3b5
The current state of the chess board is: Black rook at b8, black king at e8, black knight at g8 and black rook at h8. Black knight at d7, black pawn at e7, black pawn at f7 and black bishop at g7. Black queen at a6, black pawn at d6 and black pawn at g6. Black pawn at a5, white pawn at c5 and black pawn at h5. Black pawn at b4, white pawn at e4, white pawn at g4 and white pawn at h4. White knight at a3 and white bishop at g3. White pawn at a2, white pawn at b2, white pawn at c2, white knight at e2 and white pawn at f2. White rook at b1, white king at e1 and black bishop at h1. Black kingside is the only castle move available. Half move number is 2. Full move number is 23. White to move.