Logic Masters Deutschland e.V.

Draw a single loop in the 16x16 grid, satisfying a different rule in each quadrant.

1. Masyu
The loop passes through all circled cells in the 1st quadrant.
In cells with a black circle, the loop makes a 90° turn and goes straight through the cells before and after. In cells with a white circle, the loop goes straight through and makes a 90° turn in at least one of the cells before or after.
Not all circled cells are necessarily given.

2. Tapa-Like Loop (Full)
The loop passes through all unclued cells in the 2nd quadrant.
A clue gives the number of surrounding cells continuously passed through by the loop.
"?" can represent any positive integer.
For an example, see Dandelo's puzzle

3. Simple Loop
The loop passes through all unshaded cells in the 3rd quadrant.

4. Mid-Loop
The loop passes through all black dots in the 4th quadrant.
Each black circle is the midpoint of a horizontal/vertical line segment of the loop.
Not all black dots are necessarily given.

You can try this on Penpa+. Enjoy!