Open
Description
Start easy, 9x9-sudoku(A)
Start easy, 9x9-sudoku(B)
go to "Load Sudoku"
delete A
Start medium 4x4-sudoku(C) //I think any type works
go to "Load Sudoku"
B and C share the same thumbnail and both point to C.
They can still be distinguished by their timestamps but Complexity and Type have swopped.