rnb2bnr/pp1kp2p/B4pp1/2p5/1q6/P1PPPP2/RP4PP/1NB1K1NR b K - 2 10
FEN state: rnb2bnr/pp1kp2p/B4pp1/2p5/1q6/P1PPPP2/RP4PP/1NB1K1NR b K - 2 10 ; Best move: b4a4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black king at d7, black pawn at e7 and black pawn at h7. White bishop at a6, black pawn at f6 and black pawn at g6. Black pawn at c5. Black queen at b4. White pawn at a3, white pawn at c3, white pawn at d3, white pawn at e3 and white pawn at f3. White rook at a2, white pawn at b2, white pawn at g2 and white pawn at h2. White knight at b1, white bishop at c1, 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 2. Full move number is 10. Black to move.