1rb1kbnr/2pp1ppp/1p6/p1n1p3/P4P2/R1N4N/1PPQP1PP/2B1KB1R b k - 0 10
FEN state: 1rb1kbnr/2pp1ppp/1p6/p1n1p3/P4P2/R1N4N/1PPQP1PP/2B1KB1R b k - 0 10 ; Best move: b6b5
The current state of the chess board is: Black rook at b8, black bishop at c8, black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at c7, black pawn at d7, black pawn at f7, black pawn at g7 and black pawn at h7. Black pawn at b6. Black pawn at a5, black knight at c5 and black pawn at e5. White pawn at a4 and white pawn at f4. White rook at a3, white knight at c3 and white knight at h3. White pawn at b2, white pawn at c2, white queen at d2, white pawn at e2, white pawn at g2 and white pawn at h2. White bishop at c1, white king at e1, white bishop at f1 and white rook at h1. Black kingside is the only castle move available. Half move number is 0. Full move number is 10. Black to move.