Domino

After identifying all 27 dominoes on the board, the domino with pips 4 and 5 was not found. Thus, it must be the excluded domino.

Checking the pip combinations across the board, every double-six domino appears except the 1-5 tile, which is absent.

The blank-valued dominoes shown are 0-0, 0-1, 0-2, 0-3, 0-4, and 0-6. The 0-5 domino does not appear, so it is the missing tile.

I read the pip values of the visible halves as best I could at this resolution. Across the board, the 5-5 double does not appear among the dominoes I could iden...

The board contains 27 dominoes. Systematically checking all 28 combinations 0-0 through 6-6, every domino appears once except 2-2 which never appears, so it is...