Cases added. Thank you for your help.

I can add these two cases, but I don't want to add some very big test cases into samples test.

If I add this:

.....
.....
.....
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The length should be 21, not 22.

Would this one fit?

Otherwise I'll just add those two.

I fixed this point, thank you for pointing it out.

Any other thing that could be improved, please let me know.

You are trying to return 2 when n is 3, but there are 2 numbers in middle row, center does not exist.

Not a Kata issue.

In Python, just notice that no matter the user solution returns an int or a str, both may pass the test, is this okay?

Maybe put {2, 3, 10, 30} as a sample test?

Using your technique, get it down to 85.

The examples in Thre-of-a-Kind are Full House...

should be fixed now.

In description says return the smaller number if 2 numbers are same distance from n, but right now asking for the one appear first.

Duplicate?

Let me edit the description to make it clearer, also I will put some hints.

The main difference between this 2 Kata is that going back to the beginning point or not

For this one, you can save 1 step in certain situation, because you can end at anywhere.

Ending at one of the particular points will save you 1 step. But these points might not always exist, so you will see it has 1 less in some cases, but not all.

Forgot about this, now user will be given a copy of grid, should be fixed.