Find a Pair
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Find the identical pair among the given images.
(Example (find one pair among the triplets) from WPC 2013 IB)
- In some puzzle, rotated/reflected images are considered identical.
- Puzzle asking a triplet among pairs / a pair among triplets is possible.
- In Find a Pair puzzles from WPC 2016/Round 7, the images were subgraphs of a complete graph with 7 vertices. In one of the puzzles, solvers were asked to find which two graphs were complements, or dual graph, of each other.
History of the puzzle
One of the most common observational puzzles that, in terms of frequentness, joins the ranks of Spot the Differences puzzle.