Tiger had a few tricks up his sleeve — he changed his number up to four times to keep her off his trail.

“He always texted or called with a new number,” alleged mistress Jamie Grubbs told Us Magazine.

Woods also warned her to not text back, telling her, “I have too many people around.”

Also, Elin started making plans for an escape months ago, and finalized such plans this week when she bought a house in her native Sweden.

Get more in this full report.