A position in which the player on the move must yield with his king allowing his opponent to advance with his own king.
The difference of quantity or quality between two propositions having the same subject and predicate.
A political party or movement opposed to the party or government in power.
In United States intellectual property law, a proceeding in which an interested party seeks to prevent the registration of a trademark or patent.
The action of opposing or of being in conflict.
The apparent relative position of two celestial bodies when one is at an angle of 180 degrees from the other as seen from the Earth.
An opposite or contrasting position.
A competitor (person, team, company, etc.) with the same goal as another, or striving to attain the same thing. Defeating a rival may be a primary or necessary goal of a competitor.
Someone or something with similar claims of quality or distinction as another.
Having the same pretensions or claims; standing in competition for superiority.
To be equal to, or match, or to surpass another.
To oppose or compete with.
To strive to equal or excel; to emulate.