Domino

Checking the pip combinations across the board, the 0-3 domino is the only double-six combination not represented; all other combinations appear.

I compared the dominoes shown against the double-six set; the 5-5 double does not appear on the board.

Reading the pip counts from the board, the 6-6 domino does not appear among the visible pieces, so it is the most likely excluded tile. This is a best-effort re...

The board contains 27 dominoes. Counting halves, each value should appear 8 times. Blanks (0) appear only 7 times. Checking all 0-x pairs systematically: 0-0, 0...