Christmas Challenge 2019 – Day 08 (Jan 01)

CipherSolution

29523253970307008393672373667071390715876136039480345706363971743637330765397074930293035733633735430083635033343673570366723530636393480345373052570035434035407136397620377172395701763172343730358367353936373736355357137305257071953436707137363772330396363934700395034539302035295232539703733076543635035530897117653089712952325391360394

Day 8 is a Straddle Checkerboard cipher with a default alphabet A-Z with spare positions 3 and 7

Plaintext :
Checkers is a group of strategy board games for two players which involve diagonal moves of uniform game pieces and mandatory captures by jumping over opponent pieces. The most popular forms are American checkers, played on an eight by eight checkerboard.