Click START to begin - then fill in the 100 squares with World countries (see NAMING NOTE below) based on the categories in the rows and cells. For example, if you are looking at a cell with 'Asia' in its row, and 'Starts With A' in the column, that cell can be filled in with 'Armenia.' Many shortened names of countries are accepted, such as DRC, CAR, UAE, UK, US, etc. Answering a country which doesn't fit in any remaining unanswered cell will end the quiz.
Occasionally a cell may not have a qualifying answer, in which case it will appear blank and be a gimme. After completing the quiz you can simply click RESTART to play again.
Please note that 'star on flag' does not include a representation of the Sun.
Scoring is based on 100 points for each correct (or blank) square, and 5 points are subtracted for every second used on the quiz. So you are rewarded for getting squares quickly, however be careful as not to name a country which doesn't qualify for an open cell.
NAMING NOTE: You must type a '.' (period) after a country name or abbreviation to submit it, to prevent entering a country you don't want to (i.e. Guinea when you want to enter Guinea Bissau). For country naming purposes, the following names are used: Cote d'Ivoire, Timor-Leste.
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Quiz Takers 
This will probably be the largest Blackout grid size I’ll make 🙂 You’ll need to go full screen probably!
information overload
villa real and castelo branco not counting for PT 10+ letters/two+ words
Don’t have them as 50K+ population.
Why does Olivos not count for Argentina anymore? I’m pretty sure it does for the 10×10
ok it doesn’t for the 10×10 either anymore, but is has a population of ~75k?
I changed a handful of Buenos Aires localities to the name of the Partido, which they should have been. So Olivos is now Vicente Lopez.
I have played this quiz dozens of times, but there is an issue right now: it seems like cities smaller than 100k do not load nor get accepted. There are a lot of empty squares, and the “Pop 50-100k” is completely empty. Moreover, cities like Kiel and Jena are not accepted as German cities with 2-4 letters.
Retry it now, had a small issue I just fixed.