eleven wrote:DonM wrote:However, as a manual solving method, a forcing chain is quite different from an AIC.

Excuse me, but this is just rubbish. Logically they are exactly the same (when you restrict forcing chains to 2 alternative starting points), as well as for a manual solver. What is the difference, when you say "one of x and y must be true, if x then .. and if y then ..." or (x=y) with an AIC left and right?When it comes to more difficult puzzles with few, if any, bivalue cells, the weakness in the forcing chain method for manual solvers becomes more apparent

Do you really know, what a forcing chain is ?SINs were interesting from a theoretical point-of-view, but in practice the concept, not the least of which when it came to notation, was unwieldy for manual solvers and was never picked up as a practical manual method

If you ever have tried to solve hard puzzles manually, you will know that when trying to expand one direction of an AIC, it will happen, that this number runs into a contradiction. Embarrassing ?

Gee Eleven, when you talk like that I get all sorts of warm fuzzies.

That's going to constitute my only response because I've come to learn that you're a sniper. You fire these shots then disappear or come up with an obscure puzzle challenge that you already know the answer to, the reason for which is obvious, though irrelevent to the original subject.