Domino

By systematically identifying all dominoes present in the image and comparing them against a complete double-six domino set, the domino with the combination of...

I could not read every pip count reliably from the image, so this is a low-confidence guess. Checking the halves I could identify, the 0-6 pairing did not clear...

Comparing the pip combinations shown on the board against the complete double-six set, the 1-5 domino is the combination that does not appear.

The board shows the other six doubles—0-0, 1-1, 2-2, 3-3, 5-5, and 6-6—but no 4-4 domino.

The board displays 27 dominoes. Systematically checking all 28 combinations of a double-six set (0-0 through 6-6) shows 0-0, 0-1, 0-2, 0-3, 0-4, 0-5, 0-6, 1-1,...

The board contains 27 dominoes. Scanning all values, the dominoes with a blank half present are 0-0, 0-2, 0-3, 0-4, 0-5, and 0-6; the only blank-containing domi...