r1k4r/pq3pbn/b1n2N1p/6pP/p1ppP1P1/1P5B/R1P1KP2/2B2QNR w - - 4 23
FEN state: r1k4r/pq3pbn/b1n2N1p/6pP/p1ppP1P1/1P5B/R1P1KP2/2B2QNR w - - 4 23 ; Best move: a2a4
The current state of the chess board is: Black rook at a8, black king at c8 and black rook at h8. Black pawn at a7, black queen at b7, black pawn at f7, black bishop at g7 and black knight at h7. Black bishop at a6, black knight at c6, white knight at f6 and black pawn at h6. Black pawn at g5 and white pawn at h5. Black pawn at a4, black pawn at c4, black pawn at d4, white pawn at e4 and white pawn at g4. White pawn at b3 and white bishop at h3. White rook at a2, white pawn at c2, white king at e2 and white pawn at f2. White bishop at c1, white queen at f1, 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.