### No Four in a Row by Matej Uher

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Author/Opus: This is the 1st puzzle from guest contributor Matej Uher.

Rules: Place either an ‘X’ or an ‘O’ into each empty cell so that four consecutive ‘X’s or ‘O’s do not appear horizontally, vertically, or diagonally.

Difficulty: 2 stars

Time Standards (highlight to view): Grandmaster = 2:00, Master = 2:45, Expert = 5:30

Solution: PDF; a solution video is also available here.

• Chandrachud says:

First time solving this type … took some time for the logic to flow

• Chandrachud says:

I wonder what the second part could be …

• sudgy says:

Prediction: Gur bgure chmmyr vf n pvcure fyvgureyvax

• Bryce Herdt says:

My own prediction: jvyyo rfanx rcvgk

• Damon French says:

Spoilers: Tbbq pnyy sebz Fhqtl, arire pbafvqrerq n pvcure. Fcrag n ybat gvzr gelvat gb fbyir vg nf n fanxrcvgk bayl gb cyht vg vagb n fbyire naq frr gurer jrer ng yrnfg bar uhaqerq gubhfnaq fbyhgvbaf nf jevggra.

• R says:

Your solution is correct, but how did I arrive here… no idea. At least it was not 100% logical

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