rn1q1b1r/6np/pk2ppp1/1pp5/P5PQ/N3BP1P/1PP1K3/R5NR w - - 4 23
FEN state: rn1q1b1r/6np/pk2ppp1/1pp5/P5PQ/N3BP1P/1PP1K3/R5NR w - - 4 23 ; Best move: a1d1
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black bishop at f8 and black rook at h8. Black knight at g7 and black pawn at h7. Black pawn at a6, black king at b6, black pawn at e6, black pawn at f6 and black pawn at g6. Black pawn at b5 and black pawn at c5. White pawn at a4, white pawn at g4 and white queen at h4. White knight at a3, white bishop at e3, white pawn at f3 and white pawn at h3. White pawn at b2, white pawn at c2 and white king at e2. White rook at a1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 23. White to move.