High Quality Content by WIKIPEDIA articles! Ucchan Nanchan no Hon no Challenge: Denry Ira Ira B is a puzzle game for the Nintendo 64 released only in Japan in 1997. The game is based on the Japanese game show Ucchan Nanchan no Hon no Challenger: Kore ga Dekitara 100 Man En, lit. Ucchan Nanchan's Challengers of Fire: 1,000,000 Yen If You Can Do This!!). Puzzle video games are a genre of video games that emphasize puzzle solving. The types of puzzles to be solved can test many problem solving skills including logic, strategy, pattern recognition, sequence solving, and word completion. These games involve a variety of logical and conceptual challenges, although occasionally the games add time-pressure or other action-elements.