Henry Ernest Dudeney/Modern Puzzles/193 - A Domino Square

Modern Puzzles by Henry Ernest Dudeney: $193$

A Domino Square

Select any eighteen dominoes you please from an ordinary box,

and arrange them any way you like in a square so that no number shall be repeated in any row or any column.

The example given is imperfect, for it will be seen that though no number is repeated in any one of the columns yet three of the rows break the condition.

There are two $4$'s and two blanks in the first row, two $5$s and two $6$'s in the third row, and two $3$'s in the fourth row.

Can you form an arrangement without such errors?

Blank counts as a number.

Sources

• 1926: Henry Ernest Dudeney: Modern Puzzles ... (previous) ... (next): Problems Concerning Games: $193$. -- A Domino Square
• 1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems ... (previous) ... (next): Domino Puzzles: $482$. A Domino Square