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Escargot

In late November 2006, a Finnish applied mathematician, Arto Inkala, claimed to have created the world's hardest Sudoku.

"I called the puzzle AI Escargot, because it looks like a snail. Solving it is like an intellectual culinary pleasure. AI are my initials," he said.

"Escargot demands those tackling it to consider eight casual relationships simultaneously, while the most complicated variants attempted by the public require people to think of only one or two combinations at any one time", Inkala said.

This puzzle is available in the drop down list of examples in the Sudoku Solver. The solver cannot currently solve it, however, using the logical strategies at it's desposal. The brute force "Solution Count" can find the solution but such a method is less interesting than a logical solve route.

Escargot recieved a good deal of publicity in newspapers around the world.

Load Escargot



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Comments Talk

Friday 1-Aug-2014

... by: JPF Naperville, IL

The Escargot puzzle at aisudoku.com does not have a 1 at H3. Your solver added that via
finned swordfish? Please clarify.

Saturday 2-Jun-2012

... by: Leren

Escargot is harder than Andrew's Weekly unsolvables (except for no 49) but only requires first order forcing chain logic to solve, so it's not in the hardest class of puzzle. The 2010 puzzle by the same creator was similar but slightly easier.

Tuesday 22-Sep-2009

... by: lihsiaotung

"Escargot demands those tackling it to consider eight casual relationships simultaneously, while the most complicated variants attempted by the public require people to think of only one or two combinations at any one time", Inkala said

but I solved Escargot through considering seven casual relationships simultaneously with my solver. Maybe Escargot was not the most difficult Sudoku puzzle,I think.
Article created on 27-May-2008. Views: 21470
This page was last modified on 12-June-2008.
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Copyright Andrew Stuart @ Syndicated Puzzles Inc, 2011