r4b2/3bnp1r/3kpqpp/PPpp2R1/3P4/2N1BP1P/2P2PP1/3QKB1R w K - 1 20
FEN state: r4b2/3bnp1r/3kpqpp/PPpp2R1/3P4/2N1BP1P/2P2PP1/3QKB1R w K - 1 20 ; Best move: g5g4
The current state of the chess board is: Black rook at a8 and black bishop at f8. Black bishop at d7, black knight at e7, black pawn at f7 and black rook at h7. Black king at d6, black pawn at e6, black queen at f6, black pawn at g6 and black pawn at h6. White pawn at a5, white pawn at b5, black pawn at c5, black pawn at d5 and white rook at g5. White pawn at d4. White knight at c3, white bishop at e3, white pawn at f3 and white pawn at h3. White pawn at c2, white pawn at f2 and white pawn at g2. White queen at d1, white king at e1, white bishop at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 1. Full move number is 20. White to move.