How do I get a rough estimate of my score, fast, without AI help?

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A little game I made to practice counting quickly

Try it out here: https://count.4tc.xyz/ I mainly made this for myself, but hopefully some other people will find it useful too! Counting a real go position (in an ongoing game) involves several different skills, this is just for practicing the purely mechanical part of counting the territory on the board. I believe that by getting quicker at this part, counting becomes more fun, and you’re likely to start doing it more often in real games. Let me know if there are any issues with the page, or…

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Very naif question: do you count your points during game?

Playing on a computer it’s great because I can see at any moment how many points each player has. But on a real physical 19x19 board, that seems a daunting task to me. And sometimes the point difference is small. What do players do? They look rather at the big picture? or keep track every move? or in the end is strategy+chance that makes you win? Or maybe it’s me that I’m slow in counting because I’m a beginner?