rnbr4/pppk2p1/3ppp1p/3P4/3b1P2/4P1PN/PP3K1P/R3QB1R b - - 4 18
FEN state: rnbr4/pppk2p1/3ppp1p/3P4/3b1P2/4P1PN/PP3K1P/R3QB1R b - - 4 18 ; Best move: d4b6
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8 and black rook at d8. Black pawn at a7, black pawn at b7, black pawn at c7, black king at d7 and black pawn at g7. Black pawn at d6, black pawn at e6, black pawn at f6 and black pawn at h6. White pawn at d5. Black bishop at d4 and white pawn at f4. White pawn at e3, white pawn at g3 and white knight at h3. White pawn at a2, white pawn at b2, white king at f2 and white pawn at h2. White rook at a1, white queen at e1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 18. Black to move.