Four equal candidates in four cells (in the same row, column or QM). In the example below, the numbers (4,6,7,9) occupy the four cells marked in yellow.
The example above has a Hidden Pairs in cells A1 and A2 (3,8), easier to visualize. Below is another example. The numbers “6” in H2 and H3 can be excluded. Here is an example of Hidden Triples in the other cells of the row (1,3,9).
