Grid Detective · think & focus
Every answer is already in the clues.
A few people, a few things, and a handful of clues that rule combinations in and out. Mark the grid, cross out what cannot be, and the last square left is the one that must be true. Nothing here needs a guess.
Grid Detective is a puzzle, not a test. It is not a measure of intelligence and it measures nothing about you.
Choose a level
How much would you like to keep track of?
Each level has three grids. Start anywhere — the levels are not a ladder you have to climb in order.
Your only job
Find the one arrangement the clues allow.
3 grids · every clue matters · no timer
The clues
Every one is neededTick a clue once you have used it. Ticks are only for you — they change nothing in the grid.
Your grid
Click a square to change itEmpty means undecided. One click marks it yes and rules out the rest of that row and column. Another click marks it ruled out, and a third clears it.
Level finished
You worked through three grids.
Here is how this sitting went. Showing an answer is a perfectly good way to finish a grid — it is how the next one gets easier.
Grid Detective is free to play. Your marks stay in this browser.