The Learning Curve Collection
Published at Wednesday September 27, 2006
Are you bored of those easy Sudokus in the local newspaper, but not ready for the extreme challenges posted on this website? There is a remedy nearby: The Learning Curve collection.
The collection starts with puzzles that require line-box interactions, a few locked pairs or triples, and then progresses to naked and hidden subsets and finally some well concealed X-Wings. Not only the techniques advance, but the overall difficulty slowly increases. In SudoCue difficulty is measured by both the required techniques and the difficulty to spot them. With 2500 puzzles, you can spend months improving your Sudoku skills with this excellent collection.