Pieces of Pi Mystery Cache

• The number π is a mathematical constant, the ratio of a circle's circumference to its diameter, commonly approximated as 3.14159. It has been represented by the Greek letter "π" since the mid-18th century, though it is also sometimes spelled out as "pi" (/paɪ/).

• Being an irrational number, π cannot be expressed exactly as a common fraction, although fractions such as 22/7 and other rational numbers are commonly used to approximate π. 

• The record for memorizing digits of π, certified by Guinness World Records, is 67,890 digits, recited in China by Lu Chao in 24 hours and 4 minutes on November 20, 2005. In 2006, Akira Haraguchi, a retired Japanese engineer, claimed to have recited 100,000 decimal places, but the claim was not verified.

• The most common mnemonic technique is to memorize a so-called "piem" (a wordplay on "pi" and "poem") in which the number of letters in each word is equal to the corresponding digit of π. This famous example has several variations, including: How I need a drink, alcoholic in nature, after the tough chapters involving quantum mechanics!

NORTH  33 • 780 • 1574 • 636 • 555 • 42 • 120

WEST  68 • 901 • 3320 • 476 • 1685 • 1217 • 524 • 203

You can validate your puzzle solution with certitude.

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