r2qkbr1/pb2pp1p/1p5n/2np2p1/6P1/P1P1PN2/1BQP1P1P/RNK2B1R b q - 1 13
FEN state: r2qkbr1/pb2pp1p/1p5n/2np2p1/6P1/P1P1PN2/1BQP1P1P/RNK2B1R b q - 1 13 ; Best move: h6g4
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8, black bishop at f8 and black rook at g8. Black pawn at a7, black bishop at b7, black pawn at e7, black pawn at f7 and black pawn at h7. Black pawn at b6 and black knight at h6. Black knight at c5, black pawn at d5 and black pawn at g5. White pawn at g4. White pawn at a3, white pawn at c3, white pawn at e3 and white knight at f3. White bishop at b2, white queen at c2, white pawn at d2, white pawn at f2 and white pawn at h2. White rook at a1, white knight at b1, white king at c1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 13. Black to move.