#A28: Masyu

I think Masyu might be the only puzzle type for which I've seen a warning to new solvers that it's easy to accidentally make a mistake in the logic. It does eventually become easy to recall generally how the clues work and there are some common patterns that can be identified. For me, Masyu is one of a few puzzle types that hold the special distinction of either being very straightforward or nearly impossible to approach. I imagine the latter category involves some logic regarding high densities of straight lines that I'm unfamiliar with.

https://puzz.link/p?mashu/12/3/030003300030

https://puzz.link/p?mashu/15/6/i620i1093110931i620i4009c00000

https://puzz.link/p?mashu/15/9/000003g07i620093g17i6i0093g07i000001060000090

Variant: Every question mark follows the rules of a pearl.

https://puzz.link/p?mashu/v:/12/12/i02k13003990110036070i0910000000i020i20i0303i600