TAOCP 7.2.2.1 Exercise 403
Working
Section 7.2.2.1: Dancing Links
Exercise 403. ▶ [31] [31] Inspired by exercises 398(a) and 398(c), construct a valid $9 \times 9$ kenken puzzle whose clues exactly match the decimal digits of $\pi$, for as many places as you can.
Verified: no
Solve time: 6m24s
Working