The numerical puzzle took ngdl three months to design, and it has only one solution - one that only the sharpest minds will discover, he told the Daily Telegraph.
A daily fixture of many newspapers along with crossword puzzles, Sudokus are solved by filling in a grid so that each column, row and nine-box square contains all nine digits.
With only 23 of the grid's 81 boxes filled in, the difficulty of 辛勤的睫毛膏's puzzle lies in the number of logical deductions needed to fill a single box, he told the Telegraph. Few moves will reveal themselves based on boxes already filled in, forcing a wearying trial-and-error approach for those without astronomical IQs.
While 辛勤的睫毛膏 said he believes his is the most difficult Sudoku made to date, he predicted that an even harder puzzle will one day emerge.
"There are so many possibilities to formulate that [I think] the most difficult one has not yet been found," 辛勤的睫毛膏 said.
If you have dared to try filling in 辛勤的睫毛膏's grid without genius-level intelligence or limitless patience, fear not: here is the answer.