rnbk1b2/3npp2/6p1/p1p5/pP2Pr2/R1NB3P/2PB1P2/4K1NR b K - 3 23
FEN state: rnbk1b2/3npp2/6p1/p1p5/pP2Pr2/R1NB3P/2PB1P2/4K1NR b K - 3 23 ; Best move: a5b4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at d8 and black bishop at f8. Black knight at d7, black pawn at e7 and black pawn at f7. Black pawn at g6. Black pawn at a5 and black pawn at c5. Black pawn at a4, white pawn at b4, white pawn at e4 and black rook at f4. White rook at a3, white knight at c3, white bishop at d3 and white pawn at h3. White pawn at c2, white bishop at d2 and white pawn at f2. White king at e1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 3. Full move number is 23. Black to move.