r4b1r/n2q1kp1/1p1ppn2/p1p4p/P1b2P1R/1P4NP/3PP3/1RBQKBN1 b - - 0 18
FEN state: r4b1r/n2q1kp1/1p1ppn2/p1p4p/P1b2P1R/1P4NP/3PP3/1RBQKBN1 b - - 0 18 ; Best move: c4d5
The current state of the chess board is: Black rook at a8, black bishop at f8 and black rook at h8. Black knight at a7, black queen at d7, black king at f7 and black pawn at g7. Black pawn at b6, black pawn at d6, black pawn at e6 and black knight at f6. Black pawn at a5, black pawn at c5 and black pawn at h5. White pawn at a4, black bishop at c4, white pawn at f4 and white rook at h4. White pawn at b3, white knight at g3 and white pawn at h3. White pawn at d2 and white pawn at e2. White rook at b1, white bishop at c1, white queen at d1, white king at e1, white bishop at f1 and white knight at g1. Both players have exhausted their castles. Half move number is 0. Full move number is 18. Black to move.