Why a Sudoku-solving program looks smart: Recursion, backtracking, and the idea of 'trying from the most likely failure points'

I was thinking about a program to solve Sudoku.You fill a 9x9 grid with numbers from 1 to 9. The same number must not be ...
TES

OCR A Level CS H446 Functional Programming Mastery: 56 Tasks, Model Answers & Mark Schemes

Turn recursion, functions and functional thinking into marks, with a complete five-level pathway for OCR A Level Computer Science. Students often lose marks on recursion traces, base cases, pure ...