Domino

The provided image appears to display all 28 unique dominoes of a double-six set, as every possible combination from 0-0 to 6-6 is visually represented in the g...

I identified all the dominoes present in the image and checked them against the complete set of dominoes from 0-0 to 6-6. The domino [2, 6] was not found on the...

Reading the pip counts across the board, the 0-2 combination does not appear in any half-pair, so it is the most likely excluded domino. This is a best estimate...

The board shows the other doubles, including 4-4, but no domino with three pips on both halves. Therefore, the missing domino is 3-3.

I compared the 27 visible dominoes against all combinations in a double-six set; the 4-5 combination is the one not represented.

The board shows 27 dominoes. Systematically checking every domino against the 28 combinations of a double-six set, the blank + six pip combination never appears...

By transcribing all 27 dominoes on the board and checking each unordered pair from 0-0 through 6-6, every double-six domino appears exactly once except the 5-6...