
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Team A and Team B each have 7 players who will compete in a fixed order in a Go tournament. The first player of each team plays against each other, the loser is eliminated, and the winner faces the next player from the losing team, and so on, until all players from one team are eliminated. At this point, the other team wins. What is the total number of possible match sequences? (1988 National High School Competition Problem)

Present the answer in LaTex format: \boxed{Your answer}
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