Meowdoku Extreme 10×10 — one free cat, and that is all

The one number that makes this hard

Every board from size 8 up is built with two gift regions — one-cell regions whose cat is decided before you touch anything. Extreme is the single mode that overrides that, and it overrides it downward: one of its 10 regions is a single cell. Ten regions, one free answer. That is the lowest ratio anywhere in the game, lower even than the 5×5, which gives away a fifth of its regions.

The knock-on is structural, not just psychological. Region sizes are capped relative to what is left after the gifts are carved out, so taking a gift away tightens the cap too: Extreme's largest region is 17 cells against 18 on the daily, which is the same size board with both gifts. Smaller maximum region, fewer free cats, same hundred cells.

It is generated in a background thread

Boards of ten and up cost enough to build that doing it inline would visibly stall the page, so they are generated off the main thread and arrive a moment after you ask. The board you are looking at stays live until the new one is ready, and taps on it do not count against the game that is coming.

That cost is uniqueness. The generator does not just lay out regions and stop; it checks that the board it built has exactly one solution and repairs it when it does not. On a hundred cells with one gift, that check is most of the work — and it is the reason a legal placement here is a correct placement, not a hopeful one. When to guess explains what that guarantee is worth mid-solve.

Where to go next

If Extreme is too cold a start, the daily is the same size with both gift regions and a board everyone gets on the same day. The campaign reaches this size too, across its last sixty-two levels, but arrives there gradually.

Questions

What makes Extreme harder than the other 10×10 boards?

The gift count. Extreme is built with one single-cell region where every other board this size gets two — so it hands back half as much of its own answer, and its largest region is capped tighter as a result (17 cells against 18).

Why does the Extreme board take a second to appear?

It is generated in a background thread, and generation includes proving the board has exactly one solution. That proof is what makes a legal move a safe move.

Is Extreme solvable without guessing?

Yes — every board is checked for a unique solution before you see it. Narrow is not the same as ambiguous.