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FreeCell has been around for decades, yet one deceptively simple question still creates plenty of debate among players: which FreeCell deal is actually the hardest?
Certain numbered games have built reputations as serious challenges over the years. Deal #617, in particular, is one of the best-known difficult boards from the original Microsoft set. But a deal becoming famous for frustrating players is not necessarily the same thing as it being the hardest when every game is measured with the same method.
FreeCell Now recently analyzed all 32,000 original Microsoft FreeCell deals using a consistent deterministic difficulty model. The resulting Deal Difficulty Index, or DDI, gives each rated deal a score, rank, percentile and difficulty category.
The deal at the top is not #617.
Deal #20024 Ranks as the Hardest Solvable FreeCell Deal
According to the FreeCell Now Deal Difficulty Index, Deal #20024 is the highest-rated solvable game in the original Microsoft set, with a DDI score of 96.18.
The five hardest solvable deals in the analysis are:
Deal #20024 — DDI 96.18 — The highest-rated solvable deal in the original Microsoft set.
Deal #5712 — DDI 96.08 — Only 0.10 DDI points behind the top-ranked game.
Deal #27234 — DDI 95.59
Deal #6674 — DDI 95.47
Deal #3756 — DDI 95.39
All five fall inside the Extreme difficulty band. The full ranking covers the original 32,000 Microsoft deals and shows the score, rank and percentile for every rated game.
What makes #20024 particularly interesting is that it is not one of the deal numbers that traditionally dominates conversations about difficult FreeCell games.
That is exactly why analyzing the entire original set matters: reputation tells us which deals became notorious, while a consistent model makes it possible to compare every rated deal on the same scale.
#617 Is Still Brutal — But It Ranks 17th
The new data does not suggest Deal #617's reputation is undeserved. Far from it.
Deal #617 receives a DDI score of 94.85, placing it 17th out of 31,993 rated deals and in the 99.95th percentile.
That means #617 is legitimately one of the most difficult solvable deals in the original Microsoft PC set. It simply is not number one.
The result is a useful reality check on one of FreeCell's best-known hard games. A board can deserve its reputation and still be overtaken when the complete population is analyzed.
In this case, sixteen rated deals sit above #617.
Only 1.57% of Rated Deals Are Extreme
The full distribution also shows how thin the hardest end of the FreeCell spectrum really is.
503 deals are classified as Extreme.
4,973 are Very Hard.
6,488 are Hard.
8,443 are Medium.
7,746 are Easy.
3,840 are Very Easy.
Across the 31,993 rated deals, only about 1.57% fall into the Extreme category.
The median DDI score is 50.69, while #20024 sits at 96.18.
For players looking specifically for the nastiest FreeCell challenges, the data suggests that the truly exceptional boards are concentrated in a relatively small tail of the original Microsoft set rather than spread evenly across all 32,000 games.
Hardest Does Not Mean Impossible
There is one important distinction the ranking has to make: difficulty and solvability are not the same thing.
Deal #11982 is the famous exception in the original Microsoft set. Under the rules used for the analysis, it is unsolvable, so it does not receive a DDI score and is not placed above #20024 as though an impossible board were simply a more difficult version of a solvable one.
The analysis produced numerical ratings for 31,993 solvable deals. One deal, #11982, is classified as unsolvable, while six deals remain unresolved by the analysis pipeline.
That separation matters when answering the question, “What is the hardest FreeCell deal?”
If the question means the hardest solvable deal under the DDI model, the answer is #20024.
If it means a deal that cannot be solved under the rules used by the analysis, #11982 belongs in a different category entirely.
How the Deal Difficulty Index Measures Difficulty
FreeCell difficulty is more complicated than simply counting how many moves a solution takes.
A long solution is not automatically hard to discover, and a board that looks awkward to a human player may create a very different search problem for a solver.
FreeCell Now's DDI uses a deterministic analysis pipeline and calibrates each rated deal against the full analyzed population. Solver effort is the dominant signal, with additional structural difficulty signals used to distinguish boards that create more blockage, decision pressure or dead ends.
The result is a relative difficulty score, not a claim that every human player will experience every deal in exactly the same way.
The value of the index is consistency: the same framework is applied across the original Microsoft set instead of relying only on anecdotes about which numbered games feel difficult.
So What Is the Hardest FreeCell Deal?
The answer depends on what “hardest” is supposed to mean.
If the question is which solvable deal ranks highest under the FreeCell Now Deal Difficulty Index, the answer is Deal #20024 with a DDI score of 96.18.
Deal #617 remains exceptional. Ranking 17th out of 31,993 rated games puts it deep inside the extreme end of the distribution. It just turns out there were sixteen rated deals above it.
And #11982 should not be treated as the top of the same ranking at all. It is classified separately as unsolvable.
FreeCell Now’s analysis of the complete original 32,000-deal set suggests that FreeCell’s folklore was partly right: some famous deals really are monsters.
But once every game is measured on the same scale, the hardest solvable challenge is not necessarily the one players have talked about the most.
