An Easy 7×7 Puzzle Solved with Shape Squeeze in 11 Steps
Play this board yourself →A
B
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1

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2×
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3

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4×
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5

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6×
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7

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This 7×7 board rates as easy (difficulty score 765). Solving it from scratch takes 11 logical steps, using 6 techniques: Single cell, Row/column exclusion, Adjacency clear, Region confinement, Line confinement, Shape squeeze. Every step below is forced: nothing here is a guess.
- First, 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.
- Next, every open cell in row 1 belongs to the same region, so that region's marker has to be somewhere in this row; that clears every other open cell in the region.
- Then, every remaining candidate in this region touches F1 and G1 and F3 and G3, so whichever candidate ends up marked will clear them, and they can be ruled out now regardless of which one wins.
- After that, every open cell in row 3 belongs to the same region, so that region's marker has to be somewhere in this row; that clears every other open cell in the region.
- Now, place a marker at G4. Row 4 has exactly one open cell left. Placing here clears the rest of row 4, column G, and its region.
- From there, place a marker at F2. Region has exactly one open cell left. Placing here clears the rest of row 2, column F, and its region. Placing here also clears its 2 touching neighbours.
- Following that, place a marker at D3. Region has exactly one open cell left. Placing here clears the rest of row 3, column D, and its region.
- First, place a marker at B5. Row 5 has exactly one open cell left. Placing here clears the rest of row 5, column B, and its region.
- Next, place a marker at C7. Region has exactly one open cell left. Placing here clears the rest of row 7, column C, and its region.
- Then, place a marker at A1. Region has exactly one open cell left.
- Finally, place a marker at E6. Region has exactly one open cell left.
The key move here was Shape squeeze. Once you can spot that, this board falls quickly. ∎