[Note: The concept of this kind of puzzles is due to Kousha Nejad and appeared in the New York Times Magazine during Fall 2021 (ending Dec. 4, 2021) ]

• Problem 1
• Problem 2
• Problem 3
• Problem 4
• Problem 5
• Problem 6
• Problem 7
• Problem 8
• Problem 9
• Problem 10
• Problem 11
• Problem 12
• Problem 13
• Problem 14
• Problem 15
• Problem 16
• Problem 17
• Problem 18
• Problem 19
• Problem 20