Domino

I have identified all the dominoes on the board and checked them against the complete set of double-six dominoes. All dominoes from 0-0 to 6-6 are present excep...

Scanning all 27 dominoes on the board and checking each pair against the double-six set, every combination appears except 4-5, which never shows up in any orien...

Checking the board against all 28 dominoes in the double-six set, every combination appears except the double-four domino, which is not present.

The board contains 27 dominoes. Systematically cataloguing each domino by pip count (0=blank, 6=6 pips) shows every combination from 0-0 to 6-6 appears once exc...

By systematically scanning the grid and counting the occurrences of each pip combination, every domino from the double-six set is present except for the one wit...