r2q1knr/p5b1/2pp2pp/1b2PpB1/NQp3PP/5N2/P3PPBR/R3K3 w Q - 0 20
FEN state: r2q1knr/p5b1/2pp2pp/1b2PpB1/NQp3PP/5N2/P3PPBR/R3K3 w Q - 0 20 ; Best move: g5d8
The current state of the chess board is: Black rook at a8, black queen at d8, black king at f8, black knight at g8 and black rook at h8. Black pawn at a7 and black bishop at g7. Black pawn at c6, black pawn at d6, black pawn at g6 and black pawn at h6. Black bishop at b5, white pawn at e5, black pawn at f5 and white bishop at g5. White knight at a4, white queen at b4, black pawn at c4, white pawn at g4 and white pawn at h4. White knight at f3. White pawn at a2, white pawn at e2, white pawn at f2, white bishop at g2 and white rook at h2. White rook at a1 and white king at e1. White queenside is the only castle move available. Half move number is 0. Full move number is 20. White to move.