SudoCue Users

I don't quite understand this either. But it always work for me when the XY-chain happens in this configuration: 1. There are only 2 possible cells in the beginning and ending X-Y chain boxes. In this example, both box 3 and box 5 have only 2 cells that contain the number "5". 2. In the ab...

Oops, I meant Box 2 and Box 6.

In your example, R2C7's 7 is blue in color. Where did it chain to?

I used my XY-chain short cut and it solved all the Unfair puzzles in SudoCue easily. Very handy.

http://img264.imageshack.us/img264/8986/xychainnotri5.jpg The number "5" in R3C7 and R5C5 are in a XY-chain pattern. But I cannot eliminate any other "5"s in cells 2 and 6. However, there are only two "5"s in each of cell 3 and 5, that means both R3C7 and R5C5 must be ...

I'd been printing out the puzzle to play on paper for a month now. I have to admit, the "retracing a chain" technique is actually very useful in placing a number! Afterall, the ultimate goal of eliminating possible numbers is to place a number!

Thanks Rudd. I thought I was going crazy! Your explanation makes perfect sense.

Hello all. I'm new to Sudoku and I'm trying to learn the XY-chain link. I am having a difficult time to understand this particular technique. For example, I'm trying to solve this puzzle using Sudocue. The "Hint" suggested that XY-chain link for the digit 4. But the start and end point bel...