Defeat the professor's radscorpion in three challenges

Defeat the professor's radscorpion in three challenges is an unmarked quest in Fallout 2.

Quick walkthrough
The Chosen One can try to defeat the radscorpion in 3 tests: Perception, Agility and Intelligence. However, after defeating the radscorpion in chess (and only when using the strategy given by Seymour) it will get angry and try to attack the Chosen One.

Detailed walkthrough
The Chosen One can only win the Intelligence test, a chess game, by learning the "Flying Liver Attack" from Seymour after doing him a favor: digging him out and planting him near old ghouls' home. The other two test the Chosen One's Perception and Agility and are mere rolls against that attribute. You don't actually win, because the radscorpion always succeeds, but instead you get the experience when you tie. Killing the professor's radscorpion is bad for karma (-10), so to avoid that, after beating it in chess, just run out of line of sight, enter Sneak mode and exit combat; the scorpion won't remain hostile. Alternatively, letting one of your companions kill it prevents the karma loss.

Reward
Completing each challenge yields 500 XP. If the player completes the Agility challenge while having low Intelligence, the Professor will also give them a pack of Mentats.

Behind the scenes
"Flying Liver Attack" is a reference to a real chess opening, Fried Liver Attack.

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