rnbqkb2/1ppp1p1r/4p3/p2nN1pp/6P1/P1N2P2/RPPPPKBP/2BQ3R b q - 0 10
FEN state: rnbqkb2/1ppp1p1r/4p3/p2nN1pp/6P1/P1N2P2/RPPPPKBP/2BQ3R b q - 0 10 ; Best move: d7d6
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at d8, black king at e8 and black bishop at f8. Black pawn at b7, black pawn at c7, black pawn at d7, black pawn at f7 and black rook at h7. Black pawn at e6. Black pawn at a5, black knight at d5, white knight at e5, black pawn at g5 and black pawn at h5. White pawn at g4. White pawn at a3, white knight at c3 and white pawn at f3. White rook at a2, white pawn at b2, white pawn at c2, white pawn at d2, white pawn at e2, white king at f2, white bishop at g2 and white pawn at h2. White bishop at c1, white queen at d1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 10. Black to move.