这场象棋比赛对所有爱好者开放，欢迎任何人参加。

The chess tournament is open to ___all comers, welcoming anyone who wants to play.

这位武术大师公开接受挑战，欢迎各路高手前来切磋。

The martial arts master openly accepts challenges and welcomes ___all-comers to test their skills.