選択的
adult
age
background
battle
board
brain
caucasian
chess
chessboard
competition
competitor
contest
decision
education
enjoy
entertainment
event
focus
game
hobby
intelligence
leisure
lesson
logic
male
match
men
middle
people
piece
pieces
play
player
playing
professional
senior
skill
smart
sport
strategical
strategy
success
table
teacher
thinking
thoughtful
tournament
white
winner