How to Solve a Logic Puzzle

If you're new to grid-based logic puzzles, this tutorial will teach you the basics. Start with the "Introduction" first, then move on to the tutorials discussing specific clues or solving methods. Each tutorial contains a number of different slides - you can advance to the next slide by clicking "Next slide" at the bottom of each page, or by using the circled numerical links below each slide. Choose your specific tutorial from the list below to get started.

  • Introduction
  • True and False Clues
  • Multi-Elimination Clues
  • Neither/Nor Clues
  • Either/Or Clues
  • Greater/Lesser Than Clues
  • Unaligned Pair Clues
  • Transpositions
  • Parallel Cross Eliminations
  • Skewed Cross Eliminations
  • Pseudo-True Pairs (Aligned)
  • Pseudo-True Pairs (Staggered)
  • Transitive Relationships (Either/Or)
  • Transitive Relationships (Unaligned Pair)
  • Comparative Relationships
  • Trial and Error
  • Taking Notes

  • Either/Or Clues

    • Slide #1

      Just as there are "neither/nor" clues, there are also "either/or" clues. The concept is much the same, only in reverse.

      Here's an example: "Laura's tattoo was either the one that cost $40 or the Pisces tattoo."

      Next slide »

    • Slide #2

      When you see an either/or clue, the first thing you should do is find the three items mentioned in the clue and see if any of them already have true or false relationships on the grid where they intersect.

      In this case, we don't have any pre-existing information on the grid. But there is still a relationship to be marked on the grid thanks to this clue. Can you guess what it is?

      « Prev slide »Next slide »

    • Slide #3

      Just like the "neither/nor" clue, an "either/or" clue implies that the two items ($40 and Pisces) being discussed in relation to the first (Laura) are separate entities. Laura's tattoo can be either the $40 tattoo or the Pisces - we don't know which of the two it is, but we know it definitely cannot be both.

      Therefore we know that the Pisces tattoo didn't cost $40, and we can mark an X on the grid where those two options intersect.

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