Artificial Intelligence / Unit 4 AI 0195 short lesson, about 20 seconds
"More Rules Make It Harder"
Captions available
The idea
More rules can mean fewer solutions exist and, at the same time, less work to find one — because every rule announces impossibilities the solver can cash in.
In practice
Sparse Sudoku puzzles are the brutal ones: few clues, little to propagate, long stretches of trial.
Where people slip
The hard region is the middle: enough constraints to kill most assignments, too few to expose the killings cheaply.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
- Nothing yet depends on this.
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