About This FreeCell Solitaire Game

This is a free FreeCell Solitaire game built to be fast, quiet and fair. Deals are generated from a seed and checked by a solver before they reach you, so in normal play you are never handed a board with no solution. There is no download, no signup wall, and nothing moving around the edges of the screen while you think.

Why It Exists

Most free solitaire sites are built around the advertising, not the game. Interstitials between deals, animations competing with the board, and a layout that shifts while you are mid-drag. FreeCell deserves better than that, because it is a thinking game. The whole point is that all 52 cards are visible and the puzzle is solvable by reasoning, which only works if you can actually concentrate.

So the design brief was narrow: put the board first, keep the frame rate high, and get out of the way.

How Deals Are Made

A deal is produced by a Fisher-Yates shuffle driven by a seeded random number generator. The seed fully determines the layout, which has three useful consequences:

• The same seed always produces the same board, so a daily challenge can be identical for every player worldwide
• A finished game can be replayed and checked move by move, which is how leaderboard scores are verified rather than trusted
• Difficulty can be assessed ahead of time, because the board is known before anyone plays it

Each board is scored by a difficulty heuristic that reads the opening layout, looking at how deeply the Aces and low cards are buried and how much ordered sequence already exists. That score sorts deals into easy, moderate and hard.

The Solver

The game ships with its own FreeCell solver, and it does more than power the hint button. It runs a best-first search over game states, ranking each position by how close it is to solved and how much is still buried, then always expanding the most promising position it has seen.

Every daily challenge is put through it before publication, and a candidate board is rejected outright unless the solver produces a complete winning line for it. Casual games are served from a pool that a scheduled job keeps topped up a day ahead, and every seed in that pool is verified the same way.

There is one gap worth naming. If that pool is ever briefly empty, on a cold start before the first top-up or during an outage, the game generates a board on the spot and skips verification rather than making you wait. Random FreeCell deals are unwinnable roughly once in a hundred thousand, so this is rare on top of rare, but it is not zero and we would rather write it down than claim a guarantee we do not quite have.

In the browser the solver runs in a background worker on a strict time budget, so asking for a hint never freezes the board. That budget is also why hints are good rather than perfect: the solver returns the best move it can justify in the time it has.

Fair Play

• Standard FreeCell rules, four free cells, no house variations that quietly make the game easier
• A board is fixed the moment it is dealt and never changes in response to how you are playing it
• Leaderboard scores are calculated on the server rather than accepted from the browser
• Undo is unlimited in casual play, and carries a published scoring penalty in the daily challenge

The exact daily scoring formula, including every penalty and bonus, is written out on the daily challenge page. We would rather publish it than have anyone guess.

One deliberate exception, stated plainly

Brand new players do get an easier start, and it seems only right to say so. For your first three casual games on easy, the board is drawn from the gentlest part of the easy pool rather than the whole of it: the easiest fifth for the first two games, the easiest half for the third, and the full pool from the fourth game onward.

It applies to casual easy games only. Moderate and hard are untouched, and the daily challenge never uses it, because everyone there has to be playing the same board for the leaderboard to mean anything.

How It Is Built

The board is rendered on a canvas with Pixi.js, which is what keeps card animations smooth on a phone as well as a desktop. The site around it is a Next.js application, with accounts, leaderboards and game history in PostgreSQL. It runs entirely in the browser with no install, and works on touch and mouse alike.

That also makes it easy to drop into another site, so if you run one you can embed the game for free.

Guides and Videos

Alongside the game there is a written guide set and a YouTube channel covering the same ground on video. If you are new to FreeCell, start with how to play FreeCell Solitaire, then read the full rules and the strategy guide.

Frequently Asked Questions