The Grey Labyrinth is a collection of puzzles, riddles, mind games, paradoxes and other intellectually challenging diversions. Related topics: puzzle games, logic puzzles, lateral thinking puzzles, philosophy, mind benders, brain teasers, word problems, conundrums, 3d puzzles, spatial reasoning, intelligence tests, mathematical diversions, paradoxes, physics problems, reasoning, math, science.

undecidedlyme · Icarian Member

Here are two more number grids. The first one is easier. The second one I found more difficult to solve.

The rules are simple: just determine which squares should be filled in with an X.

Each square contains a number in its upper right corner. That number dictates how many X'd squares are adjacent to that one. For example, a square with a 3 in it would indicate that three of the squares around it should have an X in them. You just have to figure out which 3 squares. I put a dot in squares I know should NOT contain X's.

The highest number that can appear in a square is a 4, though there aren't any in this particular puzzle. But if there was a square marked with a four that would mean that all four squares directly around it would contain an X. Squares diagonally aligned are irrelevant.

I don't know what these puzzles are actually called but I like them a lot better than Sudoku. Similar thinking -- a nice, leisurely puzzle -- but less wearying, somehow. Hope you enjoy!

http://www.penngoodebooks.com/8x8Grid-03.jpg

http://www.penngoodebooks.com/8x8Grid-02.jpg

Sentran · Ray of Sucking Funshine

I'm wondering if the same concept would work with a hex grid, and numbers 0-6.
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Sentran
"Speaking of double negatives, I haven't read greylab yet today." - Lifeinmomland

itisally · Master of Disguise

Minesweeper is like this and comes with Windows, but it does include diagonals. Love it!
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