1nbqkb1r/rpppn1pp/8/p4p2/4p1PP/PP3N1B/N1PPPP2/R1BQ1K1R b k - 0 10
FEN state: 1nbqkb1r/rpppn1pp/8/p4p2/4p1PP/PP3N1B/N1PPPP2/R1BQ1K1R b k - 0 10 ; Best move: e4f3
The current state of the chess board is: Black knight at b8, black bishop at c8, black queen at d8, black king at e8, black bishop at f8 and black rook at h8. Black rook at a7, black pawn at b7, black pawn at c7, black pawn at d7, black knight at e7, black pawn at g7 and black pawn at h7. Black pawn at a5 and black pawn at f5. Black pawn at e4, white pawn at g4 and white pawn at h4. White pawn at a3, white pawn at b3, white knight at f3 and white bishop at h3. White knight at a2, white pawn at c2, white pawn at d2, white pawn at e2 and white pawn at f2. White rook at a1, white bishop at c1, white queen at d1, white king 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.