For anyone reading this thread and wondering what the Sudoku GP is, it's a series of 90 minute competitions spread over the year. The format is fairly standardised but the quality of contributors is unparalleled - these puzzles are basically the best Sudoku puzzles in the world and you can solve them for free!
I'm sure it would have been possible to treat the "Czech" theme in a more varied way. Using the letters C, Z, E on 10 sudokus and the flag on 1 sudoku seems a bit reducing of what can offer this country... I would be pleasantly surprised if the mathdoku, fuzzy arrows and lonely number are also linked to the "czech" theme.
Damn. Conceding 100 points to Heather, having just caught her in the last round, was not the plan. I even thought the round had gone OK, but making some sort of mistake on the highest-value classic clearly didn't help. A very fair round, I thought.