1rqk1bnr/p2b4/2p1p1p1/nP3p1p/6PP/2P1P3/P2PQPR1/RNB1KBN1 w Q - 2 20
FEN state: 1rqk1bnr/p2b4/2p1p1p1/nP3p1p/6PP/2P1P3/P2PQPR1/RNB1KBN1 w Q - 2 20 ; Best move: g4f5
The current state of the chess board is: Black rook at b8, black queen at c8, black king at d8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7 and black bishop at d7. Black pawn at c6, black pawn at e6 and black pawn at g6. Black knight at a5, white pawn at b5, black pawn at f5 and black pawn at h5. White pawn at g4 and white pawn at h4. White pawn at c3 and white pawn at e3. White pawn at a2, white pawn at d2, white queen at e2, white pawn at f2 and white rook at g2. White rook at a1, white knight at b1, white bishop at c1, 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 2. Full move number is 20. White to move.