Some demos of User:Splarka/summabletables.js. See documentation/comments there.
In Firefox/Mozilla you can test this by copy/pasting this to your browser location bar:
javascript:void(importScript('User:Splarka/summabletables.js'));
Of course, read User:Splarka/summabletables.js first to make sure it isn't a sysop-hijacking script.
Examples edit
| Name | Bob | Joe | Eve | Ted |
| Game 1 | 5 | 7 | 0 | -1 |
| Game 2 | 1 | 2 | 4 | 3 |
| Game 3 | 7 | 2 | 6 | 2 |
| Game 4 | 0 | 3 | 12 | 2 |
| Totals |
| Name | Bob | Joe noclass | Eve | Ted |
| Game 1 | 5 | 7 | 0 | -1 |
| Game 2 | 1 | 2 | 4 | 3 |
| Game 3 | 7 | 2 | 6 | 2 |
| Game 4 | 0 | 3 | 12 | 2 |
| Totals |
| Name | Bob | Joe | Eve | Ted |
| Game 1 | 5 | 7 | 0 | -1 |
| Game 2 | 1 | 2 | 4 | 3 |
| Game 3 | 7 | 2 | 6 | 2 |
| Game 4 | 0 | 3 | 12 | 2 |
| Name | Bob | Joe | Eve | Ted |
| Game 1 | 5 | 7 | 0 | -1 |
| Game 2 | 1 | 2 | 4 | 3 |
| Game 3 | 7 | 2 | 6 | 2 |
| Game 4 | 0 | 3 | 12 | 2 |
| Totals |
| omg COLSPAN, but skipped | ||||
| Name | Bob | Joe | Eve | Ted |
| Game 1 | 5 | 7 | 0 | -1 |
| Game 2 | 1 | 2 | 4 | 3 |
| Game 3 | 7 | 2 | 6 | 2 |
| Game 4 | 0 | 3 | 12 | 2 |
| Totals | ||||