1rb3nr/1p2k1np/p3pp1b/2pP2pP/1P6/N1PRB3/P2QBKP1/R5N1 b - - 4 18
FEN state: 1rb3nr/1p2k1np/p3pp1b/2pP2pP/1P6/N1PRB3/P2QBKP1/R5N1 b - - 4 18 ; Best move: b7b5
The current state of the chess board is: Black rook at b8, black bishop at c8, black knight at g8 and black rook at h8. Black pawn at b7, black king at e7, black knight at g7 and black pawn at h7. Black pawn at a6, black pawn at e6, black pawn at f6 and black bishop at h6. Black pawn at c5, white pawn at d5, black pawn at g5 and white pawn at h5. White pawn at b4. White knight at a3, white pawn at c3, white rook at d3 and white bishop at e3. White pawn at a2, white queen at d2, white bishop at e2, white king at f2 and white pawn at g2. White rook at a1 and white knight at g1. Both players have exhausted their castles. Half move number is 4. Full move number is 18. Black to move.