Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
How many games had a score value of 813.5 in post-season play?

### Inputs:
table_name: table, columns: ['Rank', 'Member Association', 'Points', 'Group stage', 'Play-off', 'AFC Cup']

### Response:
SELECT COUNT Play-off FROM table WHERE Points = 813.5