1r2kbn1/p5pr/1p1pp1Np/1q3P1P/P1pP1np1/1PP1R2b/1B2P3/RN1QK2B w Q - 0 23
FEN state: 1r2kbn1/p5pr/1p1pp1Np/1q3P1P/P1pP1np1/1PP1R2b/1B2P3/RN1QK2B w Q - 0 23 ; Best move: a4b5
The current state of the chess board is: Black rook at b8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at g7 and black rook at h7. Black pawn at b6, black pawn at d6, black pawn at e6, white knight at g6 and black pawn at h6. Black queen at b5, white pawn at f5 and white pawn at h5. White pawn at a4, black pawn at c4, white pawn at d4, black knight at f4 and black pawn at g4. White pawn at b3, white pawn at c3, white rook at e3 and black bishop at h3. White bishop at b2 and white pawn at e2. White rook at a1, white knight at b1, white queen at d1, white king at e1 and white bishop at h1. White queenside is the only castle move available. Half move number is 0. Full move number is 23. White to move.