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6Complete problems only, with worked solutions first. Show everything
| # | Title | Difficulty | |
|---|---|---|---|
| 132171 | The Chinese Chessboard | Medium | |
| 132172 | Bishops--Unguarded | Medium | |
| 132173 | Bishops--Guarded | Medium | |
| 132179 | Setting the Board | Medium | |
| 132180 | Counting the Rectangles | Medium | |
| 132182 | The Crusader | Medium |