"Quiz Quagmire: Part 1", known as "The Universe of Knowledge!! Eita Kyuando" in the Japanese version, is the nineteenth episode of the Yu-Gi-Oh! ARC-V anime. It first aired in Japan on August 17, 2014 and in Australia on November 14, 2015. It became available with official subtitles via Crunchyroll on November 22, 2016.
In order to qualify for the Junior Arc League Championship, Yuya has to continually win in official Duels. Nico Smiley has prepared for him a second Duelist - a Duelist in the Clarity Prep School named Pierre L'Supérieure who has the nickname of "King of Quizzes". Pierre is an expert in the Action Field known as the "Quiz Quest". Dueling in this field, a series of difficult and bizarre quiz questions are asked of the Duelists. Yuya faces a problem when he cannot answer these questions correctly, landing him in a tough battle against Pierre.
Turn 2: Yuya Yuya Normal Summons "Performapal Bowhopper" (1500/1000). "Bowhopper" attacks "Quiz Monkey", but Eita activates the effect of "Quiz Monkey" as it is battling. Yuya must guess how many "Quiz" monsters Pierre will control at the end of his Battle Phase. If he answers correctly, he will gain 1000 LP. If he answers incorrectly, "Quiz Monkey" will be Special Summoned from Pierre's Graveyard and Pierre may destroy a monster Yuya controls, with "Quiz Monkey" then having its ATK and DEF change to that monster's. Yuya guesses 0 and the attack continues, but Pierre activates his face-down "Not So Fast!" as a "Quiz" monster is battling. Once per turn, it cannot be destroyed by battle and neither player will take battle damage. Therefore, "Quiz Monkey" is not destroyed and Yuya has thus answered the question incorrectly and "Bowhopper" is destroyed ("Quiz Monkey": 0 → 1500/0 → 1000).
Turn 3: Pierre
"Quiz Monkey" attacks directly, but Yuya finds and activates the Action Card "Quiz Action - Science for 100". If he answers the question correctly, he will gain 100 LP and take no battle damage; if he answers incorrectly, he will take 100 damage. The question is: "There is an ice cube in a cup full of water. When the ice cube melts, will the water overflow the cup?". Yuya answers Yes, which is incorrect (Yuya: 4000 → 3900 LP) and the attack continues (Yuya: 3900 → 2400 LP). As a "Quiz" monster inflicted battle damage, Pierre Special Summons "Quiz Sphinx" in Attack Position via its own effect (1000/2000). "Quiz Sphinx" attacks directly (Yuya: 2400 → 1400 LP).