Henry Ernest Dudeney/Modern Puzzles/152 - A New Leap-Frog Puzzle/Solution
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Modern Puzzles by Henry Ernest Dudeney: $152$
- A New Leap-Frog Puzzle
- Make a rough board, as shown, and place seventeen counters on the squares indicated.
- The puzzle is to remove all but one by a series of leaping moves, as in draughts or solitaire.
- A counter can be made to leap over another to the next square beyond, if vacant, and you then remove the one jumped over.
- It will be seen that the first leap must be made by the central counter, No. $9$, and one has the choice of $8$ directions.
- A continuous series of leaps with the same counter will count as a single move.
- It is required to take off $26$ counters in $4$ moves, leaving the No. $9$ on its original centre square.
- Every play must be a leap.
Solution
Make the following plays:
- $9$ over $13$, $14$, $6$, $4$, $3$, $1$, $2$, $7$, $15$, $17$, $16$, $11$.
- $12$ over $8$.
- $10$ over $5$ and $12$.
- $9$ over $10$.
Sources
- 1926: Henry Ernest Dudeney: Modern Puzzles ... (previous) ... (next): Solutions: $152$. -- A New Leap-Frog Puzzle
- 1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems ... (previous) ... (next): Answers: $369$. A New Leap-Frog Puzzle