An Easy 6×6 Puzzle Solved with Region Confinement in 9 Steps

This 6×6 board rates as easy (difficulty score 440). Solving it from scratch takes 9 logical steps, using 4 techniques: Single cell, Row/column exclusion, Adjacency clear, Region confinement. Every step below is forced: nothing here is a guess.

1. First, every open cell left in this region sits in column A, so its marker has to land there; that clears every other open cell in the column.
2. Next, place a marker at B4. Region has exactly one open cell left. Placing here clears the rest of row 4, column B, and its region. Placing here also clears its 3 touching neighbours.
3. Then, place a marker at A6. Region has exactly one open cell left. Placing here clears the rest of row 6, column A, and its region.
4. After that, every open cell left in this region sits in row 2, so its marker has to land there; that clears every other open cell in the row.
5. Now, every open cell left in this region sits in column D, so its marker has to land there; that clears every other open cell in the column.
6. From there, place a marker at C2. Region has exactly one open cell left. Placing here clears the rest of row 2, column C, and its region. Placing here also clears its 1 touching neighbour.
7. Following that, place a marker at D5. Region has exactly one open cell left. Placing here clears the rest of row 5, column D, and its region.
8. First, place a marker at F3. Region has exactly one open cell left. Placing here clears the rest of row 3, column F, and its region.
9. Finally, place a marker at E1. Region has exactly one open cell left.

The key move here was Region confinement. Once you can spot that, this board falls quickly. ∎