I feel the invasion at move 66 should not have lived https://online-go.com/game/11558188 yet it did. Does the following sound correct? Had I played move 69 at G3 instead of E4 I believe white would have lived but of course the ladder would not have happened. Had I played played move 67 at E3 instead of D4 I believe white would have died.
Since the invasion really ought to have failed, I wonder if I violated a more general principle of which I may be unaware.