How to solve this 6×6 logic puzzle
A
B
C
D
E
F
1
2
3
4
5
6
1🐱
2
🐱
3
4
🐱
5
🐱
🐱
6
🐱
This 6×6 board rates as gentle (difficulty score 431). Solving it from scratch takes 15 logical steps, using 4 techniques: Single cell, Row/column exclusion, Adjacency clear, Region confinement. Every step below is forced: nothing here is a guess.
- 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.
- Next, place a marker at B3. Region has exactly one open cell left. Placing here clears the rest of row 3, column B, and its region. Placing here also clears its 3 touching neighbours.
- Then, place a marker at A1. Region has exactly one open cell left. Placing here clears the rest of row 1, column A, and its region.
- After that, place a marker at D2. Region has exactly one open cell left. Placing here clears the rest of row 2, column D, and its region.
- Now, every open cell left in this region sits in column E, so its marker has to land there; that clears every other open cell in the column.
- From there, place a marker at F4. Row 4 has exactly one open cell left. Placing here clears the rest of row 4, column F, and its region. Placing here also clears its 1 touching neighbour.
- Following that, place a marker at E6. Region has exactly one open cell left. Placing here clears the rest of row 6, column E, and its region.
- Finally, place a marker at C5. Region has exactly one open cell left.
The key move here was Region confinement. Once you can spot that, this board falls quickly. ∎