tasuki: R1 surely isn't "the best ko". It's the same wrt white taking first, but it loses two points!
Ivan Detkov: I agree that it is not best. P19 stone is useful and it is better to put it. Having said that, it is elementary series. Both variants are OK.
I agree that it is not best. P19 stone is useful and it is better to put it. Having said that, it is elementary series. Both variants are OK.