How to play
Below the grid the words wait in small groups by length. Pick one, then pick a run of empty squares as long as the word — or choose the squares first. The word drops in only where its length matches and every letter it shares with a crossing word agrees. Changed your mind? Tap the word in the list again and it leaves the grid.
Each puzzle has exactly one complete solution. That was checked by a solver that tried every arrangement; where two fillings were possible, the generator printed a few letters in advance until only one remained.
Strategy that works
- Start with the unique lengths. If only one word has seven letters, it has only one possible place. Each room page tells you whether such a word exists.
- Then follow the crossings. Every word you place prints letters into the words that cross it, and those letters usually leave only one candidate.
- Use the printed letters. A letter shown in the grid before you start is a strong anchor: find the words that have it at the right position.
- Count before you guess. When two words of the same length are left for two places, compare their letters at the crossing points rather than trying both.
- Fill the long places early. Long words have many crossings, so they settle the shape of the whole grid.
The three floors
On floor 1 a criss-cross is a handful of short words, quick to settle. Floor 2 asks you to place ten to twelve words, the longest of seven letters. Floor 3 crowds fourteen to seventeen words, some of nine letters, into a wider frame, and several of them share a length, so only their crossings tell them apart.
Questions
Is there really only one solution?
Yes. Every grid was checked by an exhaustive solver; where needed, a few letters are printed in advance to remove alternatives.
Can I place a word in the wrong spot?
Only where it fits the length and the crossing letters. A fitting word in the wrong place will block another word later; take it out from the list and try again.
Does it work with a keyboard?
Partly: the word buttons can be reached with Tab, but places in the grid are chosen by tapping or clicking.
What does a hint do?
It places one word correctly for you and counts in your result.
How is this different from a crossword?
There are no clues: you already know every word. The puzzle is pure placement and logic.