r1bk1b1r/q2nn3/2p2pp1/3pP2p/1p1NP3/BPP4P/P4PP1/1RK2BNR w - - 0 18
FEN state: r1bk1b1r/q2nn3/2p2pp1/3pP2p/1p1NP3/BPP4P/P4PP1/1RK2BNR 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 d8, black bishop at f8 and black rook at h8. Black queen at a7, black knight at d7 and black knight at e7. Black pawn at c6, black pawn at f6 and black pawn at g6. Black pawn at d5, white pawn at e5 and black pawn at h5. Black pawn at b4, white knight at d4 and white pawn at e4. White bishop at a3, white pawn at b3, white pawn at c3 and white pawn at h3. White pawn at a2, white pawn at f2 and white pawn at g2. White rook at b1, white king at c1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 18. White to move.