Masyu jigsaw puzzle

Question

Here's a masyu puzzle for you. The rules are as follows

Draw a single closed loop which does not cross or touch itself.
  The sections of the loop run horizontally or vertically between the center points of orthogonally adjacent cells.
  The loop must visit all cells with a white or a black circle but not necessarily all other cells.
  In a cell with a black circle the loop must turn by 90° and must travel straight through the previous and next cell.
  In a cell with a white circle the loop must travel straight through and must turn by 90° on the previous or the next cell.

Oh dear, I must have dropped and broken it. I'm sure you can still figure it out. A few rules for putting it back together.

None of the pieces may be rotated, and no two pieces may overlap.
  The thick borders on the pieces must coincide with the perimeter of the grid.

Source

bobble · Accepted Answer

I thought it was a shame such a nice puzzle didn't have an explanation of its solve path. So here's mine! Click through to get the (large) full-size images. "Connectivity deduction" means "I put a line here because if there isn't a line, a single connected loop is now impossible". Shaded pieces mean I've placed them, and shaded parts of the grid have pieces placed for sure.
Part 1: Putting some pieces in
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Step 2:

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Step 7:

Part 2: Drawing some lines
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Step 11:

Part 3: Putting some pieces in while drawing some lines
Step 12:

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Step 14:

Step 15:

Part 4: To the end!
Also known as: I do way too detailed step-by-step.
Step 16:

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Step 18:

Step 19 (also the solution):

Gareth McCaughan · Answer

I believe this is the unique solution:

Masyu jigsaw puzzle

2 Answers

Part 1: Putting some pieces in

Part 2: Drawing some lines

Part 3: Putting some pieces in while drawing some lines

Part 4: To the end!

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