In yugioh episode 21 where joey and yuig must choose a door, yugi chooses a coin. can anyone (see options)?

Question

explain to me how he knew which door was the right one?

Answer 1

Yugi cheats and uses a two headed coin. Realizing that Para and Dox could change which door was the right one after he picks, he tells the two that he picks whichever door lands facedown on the coin. After the coin landed, Para and Dox, looking at the coin, say that the door on the top was the right one, and thus Yugi chose wrong. Yugi then flipped over the coin, showing them he did indeed pick the right door. Since Para and Dox had already told him whcih door was the "correct" one, they couldn't take it back.

Answer 2

after telling the right one which was wrong, yugi said that the maze can change its own pathways so the  right door was the left door.