rn1q2kr/1b2b1pp/pppp3n/8/1PP2pPP/4P3/P2P1P2/R1BNKBNR w Q - 2 20
FEN state: rn1q2kr/1b2b1pp/pppp3n/8/1PP2pPP/4P3/P2P1P2/R1BNKBNR w Q - 2 20 ; Best move: g4g5
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black king at g8 and black rook at h8. Black bishop at b7, black bishop at e7, black pawn at g7 and black pawn at h7. Black pawn at a6, black pawn at b6, black pawn at c6, black pawn at d6 and black knight at h6. White pawn at b4, white pawn at c4, black pawn at f4, white pawn at g4 and white pawn at h4. White pawn at e3. White pawn at a2, white pawn at d2 and white pawn at f2. White rook at a1, white bishop at c1, white knight at d1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White queenside is the only castle move available. Half move number is 2. Full move number is 20. White to move.