User Interface Improvement Suggestions

[dzz]

Great site! I was recently introduced to these BQ puzzles and spent way too much time in competition mode this month

Here are some modifications I think would improve the puzzle solving experience:

1. The "Sum Error" message should override the "Duplicate" message
2. The Undo function should set focus to and highlight the cleared block
3. A keyboard shortcut for Undo (maybe the "u" key )
4. The bell curve results should start with the actual record low for the puzzle
5. Later in the month, I often received the message "Puzzle has already been solved" instead of results
6. Clear final error messages when puzzle is solved (typo last entry and then correct it)
7. The Recent Games feature shows an error: Unknown column 't2.width' in 'field list'93

Thanks for your consideration,
dzz

[B2Pi]

Revivifying an ancient suggestion (with no response...)

All of the above..., Plus

1a: a redo button and shortcut ('r') for it
2a: arrow keys should move between cells

Thanks....