r1b1k1n1/3p1pq1/n1p4r/p1p3pp/1b2Pp2/P1N3PP/1BPPN3/1R1QKR2 w - - 0 18
FEN state: r1b1k1n1/3p1pq1/n1p4r/p1p3pp/1b2Pp2/P1N3PP/1BPPN3/1R1QKR2 w - - 0 18 ; Best move: a3b4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black knight at g8. Black pawn at d7, black pawn at f7 and black queen at g7. Black knight at a6, black pawn at c6 and black rook at h6. Black pawn at a5, black pawn at c5, black pawn at g5 and black pawn at h5. Black bishop at b4, white pawn at e4 and black pawn at f4. White pawn at a3, white knight at c3, white pawn at g3 and white pawn at h3. White bishop at b2, white pawn at c2, white pawn at d2 and white knight at e2. White rook at b1, white queen at d1, white king at e1 and white rook at f1. Both players have exhausted their castles. Half move number is 0. Full move number is 18. White to move.