Sole Prime Sumdoku
Between two cells, a numeric clue means two things:
Solution
1. Exactly one of those cells contains a prime number.
2. The sum of those cells equals the number in the circle.
A diamond between the cells means that both numbers are prime, or neither number is prime.
Since sums reveal a lot of information and diamonds reveal much less, the two together lead to a nice class of puzzles. For those unfamiliar with primes, you only need know that the first three primes are 2, 3, 5. As usual the solution, together with a higher quality PDF, are available below. In addition, each puzzle is available separately in case anyone would like larger cells to work with.
Comments
Post a Comment