The New Sudoku Players' Forum

[henk]

I just added this to my solver.
Is this a forcing chain? or is there another name for this? Comprehencive chains maybe??



The yellow cell must be a 6...

[tarek]

Hi there Henk,

This is a double implication chain, as some of the nodes involve non-bivalued cells, it won't be an xy chain

All the nodes are used once, so it is not a net.

in my solver this is a level 2 Poly implication chain (a step higher than a double implication xy chain)

Tarek

[Carcul]

Hi Henk.

As Tarek as written, that is a double implication chain, in this case of the discontinuous type, where the discontinuity is in r3c3 with two strong links with the same label in it.

Regards, Carcul

[henk]

Thanks tarek and Carcul!

My solver looks for these patterns after double implication chains (its the same algoritme). For humans this is a bit harder to find than a plain xy chain, so I was hoping it was another technique, or a subtechnique, so I can name it.

Tarak, you mentioned a Poly implication chain. What is the difference from a xy chain?

[tarek]

you mentioned a Poly implication chain. What is the difference from a xy chain?

I am just experimenting with the terms that should include everything, however I'm using "poly" to include everything, which is not correct.

for an excellent discussion about terms with examples check this thread

Tarek