r2q1kr1/p2nppR1/1p1pb1p1/3n4/P1p1N3/1P3PPP/2PBP3/3QKBNR b K - 0 20
FEN state: r2q1kr1/p2nppR1/1p1pb1p1/3n4/P1p1N3/1P3PPP/2PBP3/3QKBNR b K - 0 20 ; Best move: f8g7
The current state of the chess board is: Black rook at a8, black queen at d8, black king at f8 and black rook at g8. Black pawn at a7, black knight at d7, black pawn at e7, black pawn at f7 and white rook at g7. Black pawn at b6, black pawn at d6, black bishop at e6 and black pawn at g6. Black knight at d5. White pawn at a4, black pawn at c4 and white knight at e4. White pawn at b3, white pawn at f3, white pawn at g3 and white pawn at h3. White pawn at c2, white bishop at d2 and white pawn at e2. White queen at d1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 0. Full move number is 20. Black to move.