
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
A square tile with side length $D$ is placed on a $10 \times 10$ checkerboard with width $D$ so that the centers coincide. Determine the number of checkerboard squares which are completely covered by the tile.

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