соперник

соперник

Rival.

Here 'соперник' refers to an individual competing against the speaker in the context of a competition.

На соревновании мой соперник показал выдающиеся результаты.

At the competition, my rival showed outstanding results.

In this sentence, 'соперник' describes someone directly opposing the speaker in a chess game.

Соперник в шахматах оказался очень сильным игроком.

The opponent in the chess game turned out to be a very strong player.

In this case, 'соперник' denotes a political opponent vying for a position in an election.

Мой соперник на выборах предложил интересную программу.

My adversary in the elections proposed an interesting program.