– Jim

]]>I just fill in all numbers missing from a 9-square, then further subtract numbers existing in rows across and then again down. This usually leaves you with at least one single number, and then you can begin subtracting again. Most (80%) puzzles solve this way. The ones that don’t are the ones with two pairs which force you to choose one of the pair (guessing) and then go from there. You have a 50% chance of solving your first try. Then there are the really tough ones that don’t even give you that option and I have not determined any way to solve these. I.e. the “insane” ones this blog site offers.

What I would like is a simple way to solve these; any secrets or is it just guessing again? I will cross these off my list if it’s just gessing; takes all the fun out of it.

]]>Thank you.

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