The clue "Hard-to-solve problem" last appeared in the New York Times crossword on December 16, 2017. The correct answer for this puzzle is "KNOT", a 4-letter word.
Solution KNOT is 4 letters long. So far we haven´t got a solution of the same word length.
There is 1 solutions. The longest is KNOT with 4 letters, and the shortest is KNOT with 4 letters.
No - clue "HARD-TO-SOLVE PROBLEM" is not trending right now. Today´s hot clues are: Separate, build up, Unyielding, profitable and United.
Use our smart search feature to filter by word length. Our system organizes results by frequency and relevance. Search through millions of answers to thousands of crossword clues—for free!
The solution is 4 letters long.