• 1. Exactly one of the viruses has the same initial in its name and system's name it works on.
  • 2. Climax didn't neutralize the virus for Ubuntu, nor the Upsidown.
  • 3. Jellyfish blocked a virus one month after Superly did.
  • 4. The virus for Fedora, which wasn't the Overclock, wasn't stopped in November.
  • 5. Among the systems Ubuntu and Debian, one's virus was stopped in September, the other was called Daydream.
  • 6. Superly didn't neutralize the Follower. Jellyfish didn't block Upsidown.
  • 7. Prodigy didn't stop a virus for Ubuntu nor Windows.
  • 8. The Follower was neutralized two months before the virus was stopped by Jellyfish.
  • 9. The Overclock infected Windows or it was blocked by Superly.
  • 1. Exactly one of the viruses has the same initial in its name and system's name it works on.
  • 2. Climax didn't neutralize the virus for Ubuntu, nor the Upsidown.
  • 3. Jellyfish blocked a virus one month after Superly did.
  • 4. The virus for Fedora, which wasn't the Overclock, wasn't stopped in November.
  • 5. Among the systems Ubuntu and Debian, one's virus was stopped in September, the other was called Daydream.
  • 6. Superly didn't neutralize the Follower. Jellyfish didn't block Upsidown.
  • 7. Prodigy didn't stop a virus for Ubuntu nor Windows.
  • 8. The Follower was neutralized two months before the virus was stopped by Jellyfish.
  • 9. The Overclock infected Windows or it was blocked by Superly.

Observation: This table is automatically filled accordingly to the grid.

How to play

  • Start by reading all the clues;
  • Find the most basic clues and use the grid to mark them on it;
  • Use logic deduction to find propositions that are not explicit;
  • Click on a clue to mark it as used;
  • The answer table is filled automatically.

More Logic Grid Puzzles

See our logic grid puzzles list.

Need help?

If, after reading the instructions, you still don't understand how to play, try playing one of these simpler logic grids puzzles. They are "very very easy".

Printable version

You can download the PDF version of this logic grid puzzle.

Visit our Printable Logic Grid Puzzles page to download and print other Logic Grid Puzzles.

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