https://www.gnu.org/software/gnugo/gnugo_toc.html --- This is a good link to computer Go ...

http://www.cosumi.net/en/

Can play right away, on computer or phone.

Hi Anzu,

Thanks for the cosumi link. However, on an ancient iPhone 4S with a small screen, it's basically impossible to play 19x19 because there is no magnifying glass feature, so it is Extremely easy to misclick the stone: I misclicked right away on my very first move, .