The task
How to play Change Spot
Look at a small scene, let it disappear, and find the detail that changed when it returns. Each round contains three scenes: one shape change, one change in the number of marks, and one quarter-turn, presented in a shuffled order.
Identify the one changed tile in each of three before-and-after scenes.
- Study the nine tiles before the scene disappears. Scan the rows and note shapes, directions and counts.
- After the brief mask, examine the returning scene and choose the one tile that changed. The two scenes are shown in sequence, not side by side.
- Answer all three trials. Review the before-and-after details and the correct changed cell for each trial.
Phone, mouse and keyboard controls
Tap or click the changed tile when the second scene appears. Keyboard players can focus a tile and select it with Enter or Space. The visible change is never color alone, so look for shape, orientation or number of marks.
Press Begin round when you are ready to observe. Keep the game visible during the round. If an interruption requires another observation, the run is labeled Reviewed to distinguish it from an uninterrupted first attempt.
Know what your result means
How the score works
Each of the three trials counts equally. Score = round(100 × correctly identified changes ÷ 3). One correct scene scores 33, two score 67, and all three score 100. There is no bonus for rushing a selection.
A worked example
Suppose you identify the changed arrow in scene 1 and the extra mark in scene 2, but choose the wrong tile in scene 3. You found two of three changes and score 67. The review shows the missed scene’s before and after so you can inspect the exact difference.
A score is feedback on this puzzle and these rules. Compare attempts with the same game, difficulty and puzzle conditions; a score from another type measures a different task.
Learn from the answer
Common mistakes and what to try next
Only remembering the large outline
An arrow can remain an arrow while pointing in a different direction. Note direction and count as well as the general shape.
Scanning without an order
Use a repeatable route, such as top row to bottom row, so every tile gets some attention before the mask.
Looking for multiple changed cells
Each scene contains exactly one changed tile. Compare the clearest remembered features before committing to one location.
One change at a time
The targeted variation turns each grid arrangement by half a turn while retaining the tile details and the change itself. It changes where you need to look, not the kind of difference you must detect.
After a pack, the result suggests a focused variation for your lowest-scoring type. After that variation, retry it or choose a fresh practice pack. A replay is useful for learning, but its score should not be treated as a first unseen attempt.
Change Spot questions
How many tiles change in each scene?
Exactly one of the nine tiles changes. A round contains three separate scenes to answer.
Do I need to distinguish colors?
Color is not the only clue. Changes use a visibly different shape, orientation or count.
Does hard mode add more tiles?
No. All three difficulties keep a 3×3 scene. Hard mode shortens the observation time; the brief mask and three-trial structure remain the same.