Alejo's Tenuki

This is a real situation which came up in one of my games:

As you can see, white threatens to make an eye around O4 and around T5. Actually we both thought that white was going to die and so it did during the real game.

W1 tries to move the vital point,  B2 plays in the new vital point, W3 makes an atari at the two black stones, threatening to make an eye at O4. Unfortunatelly, I thought I could play some sort of eye stealing tesuji by playing at Q3 after white plays Q2; having realised it was impossible I had to retreat myself and play at Q1, which happened to be sente and allowed me to play T3, thus removing the eyespace.

Afterwards, during the review, we realised there was a path which would have led white to a secured life… Can you find it?

In fact, it’s easier that it seems… so I’ll upload the sequence and some variations on the next post