adversary
ammo
ammunition
assault
attack
background
battle
black
board
bullet
challenge
checkmate
chess
chess knight
chessboard
competition
concept
conceptual
conflict
confrontation
dark
darkness
decision
defense
fight
game
glass
gun
idea
intelligence
knight
lead
military
opposition
pistol
play
power
riffle
rifle
set
shield
strategy
struggle
tactics
violence
war
white
winner
wooden