r1b1k2r/1pp1qpbp/p1npp2n/6pB/2P1PP2/6PQ/PP1P3P/RNBK2NR b k - 0 13
FEN state: r1b1k2r/1pp1qpbp/p1npp2n/6pB/2P1PP2/6PQ/PP1P3P/RNBK2NR b k - 0 13 ; Best move: g5g4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black rook at h8. Black pawn at b7, black pawn at c7, black queen at e7, black pawn at f7, black bishop at g7 and black pawn at h7. Black pawn at a6, black knight at c6, black pawn at d6, black pawn at e6 and black knight at h6. Black pawn at g5 and white bishop at h5. White pawn at c4, white pawn at e4 and white pawn at f4. White pawn at g3 and white queen at h3. White pawn at a2, white pawn at b2, white pawn at d2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white king at d1, white knight at g1 and white rook at h1. Black kingside is the only castle move available. Half move number is 0. Full move number is 13. Black to move.