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.

MatthewV · Daedalian Member :_

Lambert · Icarian Member

Rather like the recent bathroom puzzle, I solved it fairly quickly. I have made my solution invisible so others can try it too. The way to go is to consider the 9's and nearby 8's first.

6A1 6A1 6A1 2B1 8C1 8C1 9D1 6E1 6E1 6E1 4F1 4F1 8G1
6A1 6A1 6A1 2B1 8C1 8C1 9D1 6E1 6E1 6E1 4F1 4F1 8G1
3H1 3H1 3H1 4I1 8C1 8C1 9D1 4J1 4K1 4K1 4K1 4K1 8G1
6L1 6L1 6M1 4I1 8C1 8C1 9D1 4J1 8O1 8O1 8O1 8O1 8G1
6L1 6L1 6M1 4I1 4N1 4N1 9D1 4J1 8O1 8O1 8O1 8O1 8G1
6L1 6L1 6M1 4I1 4N1 4N1 9D1 4J1 4P1 3Q1 3Q1 3Q1 8G1
6R1 6S1 6M1 3T1 8U1 8U1 9D1 6V1 4P1 9W1 9W1 9W1 8G1
6R1 6S1 6M1 3T1 8U1 8U1 9D1 6V1 4P1 9W1 9W1 9W1 8G1
6R1 6S1 6M1 3T1 8U1 8U1 9D1 6V1 4P1 9W1 9W1 9W1 4X1
6R1 6S1 2Y1 2Y1 8U1 8U1 4Z1 6V1 4A2 4A2 4A2 4A2 4X1
6R1 6S1 8B2 8B2 8B2 8B2 4Z1 6V1 6C2 6C2 6C2 2D2 4X1
6R1 6S1 8B2 8B2 8B2 8B2 4Z1 6V1 6C2 6C2 6C2 2D2 4X1
6E2 6E2 6E2 6E2 6E2 6E2 4Z1 6F2 6F2 6F2 6F2 6F2 6F2

Tony Gardner · Daedalian Member

I get the same as Lambert