r2q1b1r/pb1nkp2/n2pp3/1Pp3pp/2p1P2P/P4PPB/N2PN3/R1B1KR2 b Q - 4 20
FEN state: r2q1b1r/pb1nkp2/n2pp3/1Pp3pp/2p1P2P/P4PPB/N2PN3/R1B1KR2 b Q - 4 20 ; Best move: f8g7
The current state of the chess board is: Black rook at a8, black queen at d8, black bishop at f8 and black rook at h8. Black pawn at a7, black bishop at b7, black knight at d7, black king at e7 and black pawn at f7. Black knight at a6, black pawn at d6 and black pawn at e6. White pawn at b5, black pawn at c5, black pawn at g5 and black pawn at h5. Black pawn at c4, white pawn at e4 and white pawn at h4. White pawn at a3, white pawn at f3, white pawn at g3 and white bishop at h3. White knight at a2, white pawn at d2 and white knight at e2. White rook at a1, white bishop at c1, white king at e1 and white rook at f1. White queenside is the only castle move available. Half move number is 4. Full move number is 20. Black to move.