Open In App
Related Articles

Puzzle 25 | (Chessboard and dominos)

Improve
Improve
Improve
Like Article
Like
Save Article
Save
Report issue
Report

There is an 8 by 8 chessboard in which two diagonally opposite corners have been cut off. You are given 31 dominos, and a single domino can cover exactly two squares. Can you use the 31 dominos to cover the entire board? 

Answer: 
No 

Explanation: 
At first, it seems that there were 8*8 = 64 squares 
then 2 have been cut off so Squares remaining= 64-2 = 62 
And there are 31 dominos, so they will cover the remaining chessboard coz = 31*2 = 62 

But this is not the answer, Lets visualize it: 
 

Chessboard


Each domino we set on the chessboard will always take 1 Black and 1 White square.Therefore, 31 dominos will take 31 white square and 31 black squares exactly. On this chessboard however, we must have 32 black and 30 white squares(if we cut the corners with white squares) or 32 white and 30 black squares(if we cut the corners with black squares). Hence it is not possible to do so. 

 
 



 


Last Updated : 19 Jan, 2023
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads