rn1qkbn1/1b1p2p1/p1p4r/R3pp1p/1P2PPQ1/3P3P/2P3P1/1bB1KBNR b q - 3 15
FEN state: rn1qkbn1/1b1p2p1/p1p4r/R3pp1p/1P2PPQ1/3P3P/2P3P1/1bB1KBNR b q - 3 15 ; Best move: f8b4
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black king at e8, black bishop at f8 and black knight at g8. Black bishop at b7, black pawn at d7 and black pawn at g7. Black pawn at a6, black pawn at c6 and black rook at h6. White rook at a5, black pawn at e5, black pawn at f5 and black pawn at h5. White pawn at b4, white pawn at e4, white pawn at f4 and white queen at g4. White pawn at d3 and white pawn at h3. White pawn at c2 and white pawn at g2. Black bishop at b1, white bishop at c1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 3. Full move number is 15. Black to move.