1rbqkb1r/3ppp2/n4n1p/ppp5/1P1P1P1p/7N/P1P1PKP1/R1BQ1B1R b k - 0 10
FEN state: 1rbqkb1r/3ppp2/n4n1p/ppp5/1P1P1P1p/7N/P1P1PKP1/R1BQ1B1R b k - 0 10 ; Best move: c5c4
The current state of the chess board is: Black rook at b8, black bishop at c8, black queen at d8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at d7, black pawn at e7 and black pawn at f7. Black knight at a6, black knight at f6 and black pawn at h6. Black pawn at a5, black pawn at b5 and black pawn at c5. White pawn at b4, white pawn at d4, white pawn at f4 and black pawn at h4. White knight at h3. White pawn at a2, white pawn at c2, white pawn at e2, white king at f2 and white pawn at g2. White rook at a1, white bishop at c1, white queen at d1, 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.