detuned wrote:The loop may not intersect itself! It might be worth mentioning the loop goes through the centre of each square in the grid too.
As for tips...I find myself scoring some really good masyu times on nikoli.com every now and again, but I don't think I could particularly explain how I do it. The beauty of this puzzle is in its simplicity and the intuitive nature of the solve. Every now and again you come across some crafty trick which you have to think through a bit, but these are worth considering on a one-off basis.
nickdeller wrote:Steve - it's already there in the final line, but as you missed it, it might still not be obvious enough... Will probably do no harm to mention it more than once, so I'll formulate an amendment later in the weekend.
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