r1bk1bnr/pp3p1p/1pnppBp1/8/8/N4P2/P1PPP1PP/1R1QKBNR b K - 0 10
FEN state: r1bk1bnr/pp3p1p/1pnppBp1/8/8/N4P2/P1PPP1PP/1R1QKBNR b K - 0 10 ; Best move: g8f6
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at d8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at f7 and black pawn at h7. Black pawn at b6, black knight at c6, black pawn at d6, black pawn at e6, white bishop at f6 and black pawn at g6. White knight at a3 and white pawn at f3. White pawn at a2, white pawn at c2, white pawn at d2, white pawn at e2, white pawn at g2 and white pawn at h2. White rook at b1, 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.