At Competitive REL, I make a bad play and my opponent says "What you just did is legal, but it will lose you this game. Next time you do this, I suggest..." and he points out the correct play to me. I then call a judge and say: "My opponent gives advice to a player who has sat for his match (me). He should get a Match Loss."
If you couldn't deviate from the IPG, what infractions were commited and what penalties should be given? And if you could deviate?
Relevant IPG quote:
Tournament Error — Outside Assistance
A player, spectator, or other tournament participant does any of the following:
• Gives play advice or reveals hidden information to players who have sat for their match
Tournaments test the skill of a player, not his or her ability to follow external advice or directions. Any strategy advice, play advice, or construction advice from an external source is considered assistance.