• Support PF! Buy your school textbooks, materials and every day products via PF Here!

Checkers Problem

All right...I've been at this all night, and any help whatsoever would be appreciated!

An eight by eight square game board for checkers has a checker positioned in the fourth square of the bottom row. The checker is allowed to move one square at a time diagonally left or right to the row above. After seven moves the checker will be in the top row. How many different paths will lead to the top row?


Staff Emeritus
Science Advisor
Gold Member
Start with the first row. Write in each square the number of paths that lead from the starting position to that square. (there will be seven zeroes and one one)

Use the numbers in the first row to figure out the number of paths from the starting square to each square in the second row.

Use the numbers in the second row to figure out the numbers in the third row.

Keep doing this until you've filled the last row, then just add up the numbers!
Danke!! Very much!! I owe you one!! *runs off to solve problem*

EDIT: Final answer? 41 Wow...a lot smaller than what I was getting before...103...>_<
Last edited:

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving