what do the generations represent ?

Yes, you can check this in the example

normally sudoku has a smaller 3*3 box that has to have all 9 digits as well .. does that box apply in this question as well ?

You must be reading something wrong because the 3 tests under the too short label have less than 10 elements. Maybe you meant too long instead, if that's the case then the answer is yes.

the scoring in the 10th frame is very confusing
you get an extra 3rd shot only if you have a strike or a spare in the first 2 shots of the 10th frame right ?

I didn't hide the answer, and the tests are fine. That's why I resolved it.

Why did you hide this answer and marked as resolved, wtf?

i had a similar issue , but i realised that you're probably encountering an error in a loop, the code runs smoothly the first time but it could have an issue while running the loop again

are we supposed to preserve the tab spaces in the beginning of the string or not ?
how to deal with the spaces ?
some solutions need the spaces removed, some don't.
what's the rule for spaces ?

It's happening because inputs for tests are generated randomly. your solution has a bug which does not recognize some inputs correctly, and sometimes its 56 of randomly generated inputs, and sometimes its 52.

when i am running the same code, it shows variable number of successful tests. sometimes its 56 successful, sometimes 52. why is that happening?

It means your solution takes too much time to solve the problem. You have to find a more efficient way to solve it.

my solution works for the test but wheni attempt it , it shows the message that my solution timed out.
it does mean that my solution is correct ...? so what do i do ?