For bugreport030220.txt (not critical)
    This is caused by the incorrect image setting in SudokuFieldAction.processValue()
    To fix it, line 71 should be
    button.setIcon(FieldImage.icons[value-1]);
    instead of
    button.setIcon(FieldImage.icons[value]);

    This is a logical issue and it can be most easily found by reading the project log:
    In Sudoku World 1.7 update it is mentioned that SudokuFrame.createButtonGrid()
    and SudokuFieldAction.processValue() were changed.
    However, in Sudoku World 1.7.1 bugfix, SudokuFrame.createButtonGrid() is fixed,
    but SudokuFieldAction.processValue() was forgotten, although the same fix is needed.

For bugreport040220.txt (not critical)
    This is caused by the incorrect mapping between the message in SudokuFieldAction.actionPerformed()
    and the order of elements in FieldImage.icons array.
    The array elements are in this order:
    [sun, cow, football, house, keanu, rain, rudolph, superwoman, tree]
    But the message says they are in this order:
    [cow, football, house, keanu, rain, rudolph, sun, superwoman, tree]

    Both re-ordering the array elements and changing the message are appropriate fixes.
    Furthermore, this issue is also affected by the same problem as bugreport030220.txt

For bugreport070220.txt (critical)
    SampleGameData.java has a line mistakenly commented out in sample5, which makes it crash
    Removing the comment (but keeping the numbers) is enough to solve the issue

For bugreport080220.txt (unhelpful bug report)
    Cannot tell because the bug report has too little information

For bugreport090220.txt (not critical - doesn't crash, but actually functionality is mostly broken, so important)
    Line 50 in SudokuFieldAction.actionPerformed() should say
    value >= GameGrid.MIN_VAL && value <= GameGrid.MAX_VAL
    instead of
    value <= GameGrid.MIN_VAL && value >= GameGrid.MAX_VAL
    (the less/greater than signs are swapped).
    This issue was introduced in Sudoku World 1.9.1 and can be easily traced back from the project log.

For bugreport110220.txt (critical)
    SampleGameData class has called the field sample22 instead of sample2 (likely typo)

For bugreport210120.txt (outdated)
    Fixed in Sudoku World 1.7.1 as indicated in project log

For bugreport220120.txt (outdated)
    Fixed in Sudoku World 1.8 as indicated in project log

For bugreport240120.txt (unhelpful bug report)
    Cannot tell because the bug report has too little information

For bugreport290120.txt (outdated)
    This is actually not a bug report but a feature request
    It was implemented in Sudoku World 1.9 as indicated in the project log