r1b2bn1/p1pr4/npk4p/2Np1pp1/2P1NB2/P2P3P/1P2P1K1/R1Q2B1R b - - 0 18
FEN state: r1b2bn1/p1pr4/npk4p/2Np1pp1/2P1NB2/P2P3P/1P2P1K1/R1Q2B1R b - - 0 18 ; Best move: b6c5
The current state of the chess board is: Black rook at a8, black bishop at c8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at c7 and black rook at d7. Black knight at a6, black pawn at b6, black king at c6 and black pawn at h6. White knight at c5, black pawn at d5, black pawn at f5 and black pawn at g5. White pawn at c4, white knight at e4 and white bishop at f4. White pawn at a3, white pawn at d3 and white pawn at h3. White pawn at b2, white pawn at e2 and white king at g2. White rook at a1, white queen at c1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 18. Black to move.