rn5r/1p1bk1pp/p1p1p2n/3P3P/P1B1N1P1/bP2p3/3P4/R1BQ1KNR b - - 0 18
FEN state: rn5r/1p1bk1pp/p1p1p2n/3P3P/P1B1N1P1/bP2p3/3P4/R1BQ1KNR b - - 0 18 ; Best move: a3b4
The current state of the chess board is: Black rook at a8, black knight at b8 and black rook at h8. Black pawn at b7, black bishop at d7, black king at e7, black pawn at g7 and black pawn at h7. Black pawn at a6, black pawn at c6, black pawn at e6 and black knight at h6. White pawn at d5 and white pawn at h5. White pawn at a4, white bishop at c4, white knight at e4 and white pawn at g4. Black bishop at a3, white pawn at b3 and black pawn at e3. White pawn at d2. White rook at a1, white bishop at c1, white queen at d1, white king 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. Black to move.