The starting point

A revoke is established when a player fails to follow suit when able to do so, and the revoke is no longer correctable. Once that has happened, Law 64 looks at the automatic trick adjustment after play ends.

The law does not ask whether the revoking player later won with the card that could, or should, have been played. Instead, it works through a simple hierarchy.

The hierarchy

Step 1: Did the revoking player win the revoke trick? If yes, Law 64A1 applies. Transfer the revoke trick. If the offending side won any later trick, transfer one more trick as well.

Step 2: If the revoking player did not win the revoke trick, did the offending side win the revoke trick or any later trick? If yes, Law 64A2 applies and one trick is transferred.

Step 3: If the offending side won no tricks from the revoke trick onward, there is no automatic trick adjustment under Law 64A. Law 64C may still apply if the non-offending side was damaged.

So the automatic two-trick case requires the revoking player personally to have won the revoke trick. But the one-trick case depends on whether the offending side won the revoke trick or a later trick.

Why the AH example is only one trick

Why the KH later does not matter

Director equity adjustment

Reference: WBF 2017 Laws of Duplicate Bridge, Law 64, “Procedure after Establishment of a Revoke.” This page is a practical explanation, not a substitute for the Director applying the full law to the facts at the table.