![]() Once there are multiple AIC routes you can take like this, you know the puzzle is about to be broken. And actually I could have done that more directly here. I started in r7c3 hoping that I could eliminate one of the others in that row. I could have ended it on the 5 in r7c8, and it would have worked as a type II AIC, where the start cell cannot contain the end digit, and the end cell cannot contain the start digit, provided that the start-end cells can see each other. Like here, I started with the 2 in r7c4, hoping I’d be able to eliminate one of the other 2’s in that row, and sure enough. End points are in box 3&5.Īs far as locating it, you just have to find units of three of the same candidate, and try to route one to another so you can eliminate the third. ![]() So the starting points are both in box 7&8. If you want to keep learning, then he goes into more depth in AIC’s later on in 33-45 (Alternating Inference Chain). I always start with blue (off) and end with yellow (on). It’s one of the more advanced techniues, but if you want to get your feet wet, I recommend Sudoku Swami’s tutorial 4. Evil sudoku with 17 initial values taken from Gordon Royle list. Sudoku online is ranked as fast and with the best results. ![]() The 2 elimination is the purple-black line starting and ending in highlighted green cells. You searched for evil 17 sudoku via the Suduko search engine. Compatible with all browsers, tablets and phones including iPhone, iPad and Android. The 1 elimination the green/orange line starting and ending in highlighted blue cells. ![]()
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