When is 3-3 alive?

[stone.defender]

@le_4TC

with the limited tools we already have available today

@MrEntropy

program called Xuan Xuan Go has something like that, but you have to register for the full version (buy for 69 Euro) to get the the tsumego solver

I guess tsumego solver may proof that 3-3 can’t survive in some too small boxes. I don’t know with how big box they can work with.