The way I go about slving a puzzle is:
1. Starting with the number 1, look at the rows of boxes and columns of
boxes to see if I there's only one place the missing number one can go -
easy if two vertical boxes have a 1 in and the third has only one place it
can go. I repeat that for all the other numbers and then start with one
again, because having filled in other numbers, there's then often only one
place for it to now go. Repeat horizontally.
2. Look at each vertical row of numbers in turn and try to see if there's
only one place that 1 will go, then at the horizontal rows with the same
purpose.
3. Look at each box of 9 to see if I can fit numbers in for sure - if there
are two possible places, I lightly pencil in the number at the top of the
square.
4. Repeat 1 to 3, which often means I can complete the puzzle - but not
always.
5. Walk away and do something else. Pick it up again, and I can often see
where numbers go now.
6. Abandon that puzzle, and do another one. Come back to unfinished puzzle
and I can nearly always see where the missing numbers fit.
A "one-cup-of-coffee" puzzle usually takes me about an hour - so I'm not
very good.
Jean in Poole, Dorset
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