rnb2b1r/2pk4/p5p1/3nP2p/Pp1NPp2/BP6/2PP3P/1RQ1KB1R b K - 1 20
FEN state: rnb2b1r/2pk4/p5p1/3nP2p/Pp1NPp2/BP6/2PP3P/1RQ1KB1R b K - 1 20 ; Best move: b4a3
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black bishop at f8 and black rook at h8. Black pawn at c7 and black king at d7. Black pawn at a6 and black pawn at g6. Black knight at d5, white pawn at e5 and black pawn at h5. White pawn at a4, black pawn at b4, white knight at d4, white pawn at e4 and black pawn at f4. White bishop at a3 and white pawn at b3. White pawn at c2, white pawn at d2 and white pawn at h2. White rook at b1, white queen at c1, white king at e1, white bishop at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 1. Full move number is 20. Black to move.