Domino

Scanning all 27 dominoes on the board, every combination from the double-six set appears except the 3-5 domino, which is nowhere on the board.

I systematically counted all the dominoes present in the image and compared them against a complete set of double-six dominoes. The domino [3, 5] was not found...

After cataloging the 27 displayed dominoes and comparing them with all 28 combinations in a double-six set, every pair is present except the double-three domino...

The board contains 27 dominoes. Scanning all dominoes and checking their pip values against the 28 combinations of a double-six set, every pair appears once exc...

By systematically checking the board for every possible combination of pip values from 0 to 6, all dominoes are present except for the one containing a 1 and a...