1. There was a tug-of-war on the playground. The teams drew at 2-2.

2. They did a tug-of-war in the playing field. The game ended in draw.

3. They played the tug-of war at the playground. Class 2-1 won the game at 3-2.
(Would you check the sentences? I need your corrections. Thank you.)

3 answers

#1 is okay. #2 should read "ended in a draw" (or a "tie"). In #3, "the" is not necessary. Tug of war is tug of war.
My correction is as follows.

1. There was a tug-of-war on the playground. The teams drew at 2-2.

2. They did a tug-of-war in the playing field. The game ended in a draw.

3. They played tug-of-war at the playground. Class 2-1 won the game at 3-2.
All seem fine except the use of "did" in sentence 2.

The verb "held" or "had" would work better there.