Group the sixteen.
Sibling tool: Sequence Hunter trains position-one inference; this page trains you to spot exact relationships.
Retrieval game
Group by the intended relation, not by visual resemblance
The puzzle trains discrimination: form a relation, test it against all four members, submit it, then use the reveal to understand why competing groupings failed.
Read all sixteen items before committing to the first plausible cluster.
Name the exact relation that includes four and excludes the other twelve.
Use the board to test the group rather than moving tiles until something accepts.
After the reveal, write the relation you missed and the misleading relation you followed.
Daily grouping puzzle
Want to read the framework behind the types? See the public type pages or the sequence-anchored deep quiz for your own typing.
Train the position-one eye
Use Sequence Hunter as a separate evidence-and-inference game.