A comparative analysis of two different approaches to building a Sudoku solver highlights how Peter Norvig's constraint propagation solution proved more effective than Ron Jeffries' incremental design approach. The core difference lay in their data representations - Norvig used a map of possible moves while Jeffries used a list mimicking the visual board, demonstrating how fundamental design choices impact solution elegance and extensibility.

https://explaining.software/archive/the-sudoku-affair/

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