Brain Teasers and Puzzles

Puzzle 1

How many squares, of any size, can you find on this chessboard that do not contain a rook?

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Puzzle 2

W B H F S K F V J P Z
H S S H T J P P N W L
A F P W P N T D S W S
T R H S P L M V R G B
I D P B D W S N R T C
S R S F T D B K K F B
O M F R L Z F R K Y P
N J Z J S Z N M B J Q
E R Z F Q Z V G Y F V
P P F G F W Z W N R P
L B J V R J H F K T Z
U H F K Y F W J F S R
S S W C Q R Q Y H R S
O M W F P R Q J K H R
N M B W S K B J Y D Q
E T J Y P F D L R P F

workings hint answer print

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Puzzle 3

Below are thirteen 5-letter words, each of which has had two of its letters removed.

In total, these 26 letters are A to Z.

The remaining letters in each word are in the correct order.

There are no words that are spelled differently based on location (favour / favor, etc) and there are no plurals.

Can you find the original words?
-ai-e s-ua- -e-el -o-ed -na-e fog-- c--mp b--jo -r-it -re-t -av-n mu--c mou--

workings hint answers print

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Puzzle 4

Starting in the bottom left corner and moving either up or right, one square at a time, adding up the numbers along the way, what is the largest sum which can be made once you have reached the top right corner?