This website is about creating a 7 times 7 minesweeper-style testcase with 10 hidden stars which has a unique solution but is hard to solve via backtracking; the score that you get for a testcase is the number of recursive calls the backtracking algorithm makes before finding the answer. See rules for more details.

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1....0.
.1.....
1..3...
..23.2.
..3....
.3....2
1.1..2.

High scores:

1. An anonymous person scored 730272354 points.

2. Dimon.Sobolev scored 730272354 points.

3. Max.Khodak scored 730272354 points.

4. endagorion scored 730272354 points.

5. felix.halim scored 730272354 points.

6. mbuzdalov scored 730272354 points.

7. merettm scored 730272354 points.

8. shd scored 730272354 points.

9. FAndES.ANG scored 629909575 points.

10. indy256 scored 629909575 points.