Hi folks. I’m trying to learn the game, but I keep getting stuck in logic-traps on the basics.
For example, in the OGS go tutorial problem here:
- I place a black stone at E2.
- white responds at E4.
- The tutor tells me to place a black stone at D3… but I thought that was illegal, since that point is completely surrounded by white. So I do anyway, and win a bunch of white stones.
What is the rule that allows this move? How can I tell when placing a black stone in the middle of four whites is allowed, and when it is not?