Why is this move legal?


Dear Go players!
Could you please tell me why is this move legal? Isn’t it a suicidal move? I’m a complete novice)


Thanks a lot!


It’s not a suicidal move - it captures opposing groups, which gives it the liberties it needs.


That move is legal because it is the last liberty of the two black groups. You need at least two eyes in a group in order to make that group alive. A4 in that example, is referred to as a false eye. So the black group had zero eyes, and the reason why white could kill everything.


Thank you! Go is amazing!


Here’s also some resources that may help you.
For an overall resource for life and death https://senseis.xmp.net/?LifeAndDeath
two eyes: https://senseis.xmp.net/?TwoEyes
false eyes: https://senseis.xmp.net/?FalseEye


This series is great: https://online-go.com/puzzle/2312

This page describes your situation: https://online-go.com/puzzle/2318

The pages leading up to it give you the basics you need to understand that.