1rb3nr/ppb5/2pk1ppp/1BnppR2/P2P4/2P1PP2/2QB2P1/RN2K1N1 w Q - 0 20
FEN state: 1rb3nr/ppb5/2pk1ppp/1BnppR2/P2P4/2P1PP2/2QB2P1/RN2K1N1 w Q - 0 20 ; Best move: d4c5
The current state of the chess board is: Black rook at b8, black bishop at c8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7 and black bishop at c7. Black pawn at c6, black king at d6, black pawn at f6, black pawn at g6 and black pawn at h6. White bishop at b5, black knight at c5, black pawn at d5, black pawn at e5 and white rook at f5. White pawn at a4 and white pawn at d4. White pawn at c3, white pawn at e3 and white pawn at f3. White queen at c2, white bishop at d2 and white pawn at g2. White rook at a1, white knight at b1, white king at e1 and white knight at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 20. White to move.