Definition: In this task, you're given five sentences, numbered 1 through 5, and two options a and b for possible titles for the story. Your job is to choose the title that better fits the story. Indicate your choice by 'a' or 'b'.
Input: Sentence 1: Tonight I played chess against a 1390 opponent. Sentence 2: My rating is 1450. Sentence 3: I was losing. Sentence 4: My opponent ignored a move. Sentence 5: I checkmated him. Choices: a. Short Stack of Pancakes. b. Chess.

b