r1bk1b2/p3ppp1/1p3n2/7r/P1pp1PqP/3P2R1/1PPP4/RNBQKBN1 w Q - 1 20
FEN state: r1bk1b2/p3ppp1/1p3n2/7r/P1pp1PqP/3P2R1/1PPP4/RNBQKBN1 w Q - 1 20 ; Best move: g3g4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at d8 and black bishop at f8. Black pawn at a7, black pawn at e7, black pawn at f7 and black pawn at g7. Black pawn at b6 and black knight at f6. Black rook at h5. White pawn at a4, black pawn at c4, black pawn at d4, white pawn at f4, black queen at g4 and white pawn at h4. White pawn at d3 and white rook at g3. White pawn at b2, white pawn at c2 and white pawn at d2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1, white king at e1, white bishop at f1 and white knight at g1. White queenside is the only castle move available. Half move number is 1. Full move number is 20. White to move.