A scrap-book of elementary mathematics; notes, recreations, essays (1908)
White, William Frank, 1871- · Chicago, The Open Court Pub. Co · leaf 206
SEVEN-COUNTERS GAME. Required to place seven counters on seven of the eight spots in conformity to the following rule: To place a counter, one must set out from a spot that is unoccupied and move along a straight line to the spot where the counter is to be placed. … The writer remembers seeing this as a child when the game was probably new. The solution is so easy that it offered no difficulty then. A puzzle whose so- lution is seen by almost any one in a minute or two is hardly worth a name, and one wonders to see it in Lucas's Recreations mathematiques and…
Mathematical recreations
Internet Archive · Cornell University Library · Public domain (published before 1931). Free to use for anything.
