noun
triangle baseball; baseball without second base
A simplified baseball-like game for children, played with only three bases (first, third, and home). The lack of a second base makes the game easier and faster.
小学生のとき、よく三角ベースをして遊んだ。
When I was in elementary school, I often played triangle baseball.
三角ベースはルールが簡単
Triangle baseball has simple rules and can be enjoyed even with a small number of players.