r1b2knr/p1qpBp2/n5pp/1pp1b3/5P2/PPNP3P/R1P1P1P1/3QKBNR b K - 0 10
FEN state: r1b2knr/p1qpBp2/n5pp/1pp1b3/5P2/PPNP3P/R1P1P1P1/3QKBNR b K - 0 10 ; Best move: g8e7
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at f8, black knight at g8 and black rook at h8. Black pawn at a7, black queen at c7, black pawn at d7, white bishop at e7 and black pawn at f7. Black knight at a6, black pawn at g6 and black pawn at h6. Black pawn at b5, black pawn at c5 and black bishop at e5. White pawn at f4. White pawn at a3, white pawn at b3, white knight at c3, white pawn at d3 and white pawn at h3. White rook at a2, white pawn at c2, white pawn at e2 and white pawn at g2. White queen at d1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 0. Full move number is 10. Black to move.