r1b1kb2/2qpp1r1/nppn4/6p1/NpPPPp1p/PQ3PN1/RB3KBP/6R1 w q - 0 20
FEN state: r1b1kb2/2qpp1r1/nppn4/6p1/NpPPPp1p/PQ3PN1/RB3KBP/6R1 w q - 0 20 ; Best move: g3f5
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black bishop at f8. Black queen at c7, black pawn at d7, black pawn at e7 and black rook at g7. Black knight at a6, black pawn at b6, black pawn at c6 and black knight at d6. Black pawn at g5. White knight at a4, black pawn at b4, white pawn at c4, white pawn at d4, white pawn at e4, black pawn at f4 and black pawn at h4. White pawn at a3, white queen at b3, white pawn at f3 and white knight at g3. White rook at a2, white bishop at b2, white king at f2, white bishop at g2 and white pawn at h2. White rook at g1. Black queenside is the only castle move available. Half move number is 0. Full move number is 20. White to move.