conundrum
aim
ambition
board
brain
carving
challenge
championship
chess
cleverness
development
duel
education
engraving
evolution
figure
game
grandmaster
idea
intellect
intent
intention
issue
jigsaw
leader
logic
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mind
piece
play
problem
progress
purpose
puzzle
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reasonable
riddle
rook
sport
target
task
tournament
toy
training
white
wisdom
wit
wood