if M – 2 is zero or -1 ( Feb or Jan) , less one from the year ( D ) and add 12 months to month M.

Drop all the residuals/fractions in all cases and take the whole number only

5) [ 14 + 12.8 + 5 + 5 + 21 – 40] divided by 7

6) {14 + 12 + 5 + 5 + 21 – 40) divided by 7

7) 17 / 7 = 2 and 3/7

If the reminder comes ZERO, it is SUNDAY. 1/7 means MONDAY, 2/7 means Tuesday, 3/7 means WEDNESDAY, 4/7 means THURSDAY, 5/7 means FRIDAY AND 6/7 means SATURDAY.

Hence 14-7-2021 is Wednesday .

9) Try for other dates also.

By T.R.Jothilingam,Retd.Railway Station Supt., Madurai

There are so many other mind boggling games in the Chess Board, other than playing chess.

Some of the puzzles are given below

In a 8 x 8 Chess Board, you can put a maximum of 8 Queens ( each one is to be treated with the power of QUEEN).

One of the position is given below. There are 8 Queens available and check and satisfy by yourself that they are not cutting each other .

Believe. There are 92 different methods available. Try by yourself to find out more methods. Enjoy the new experience

64 knight(Horse) movement in a chess board. It is one of the hardest puzzles that can be solved by the Human Brain.

It is very tough to do, but it is possible.

Draw a 8 x 8 squares in a paper with Ballpoint pen and start writing 1,2,3 etc with a pencil. Start number one anywhere and continue the next number in a knight move method, till you are reaching 64.

See the magical thing in the picture given below. In the outer ring all the diagonally opposite numbers are having a difference of 6. Also in the second inner ring also the diagonally opposite numbers are giving a difference of 6 excepting 10 and 64

Some of my students ( Eighth Standard – 13 years) in Madurai have done more than 10 different methods. You can find infinite ways of doing this. Best wishes.

FIRST ROW PIECES PROBLEM

There are eight pieces available in the first row of the Chess Board.

They are One King, One Queen, two Bishop (camel) and two Knight (Horse) and two Rook (Elephant).

With these Eight pieces, when placed in some proper positions, they will guard all the sixty four squares with their own power. Please check and satisfy by yourself.

Once again, there are so many different methods available. Try to do it more and more methods

64 King move in a chess Board and 8 x 8 Magic square

In the following chess board, one King starts from number one and make 64 moves and completes his journey without any break.

Finally, if you add the numbers it will give a total of 260 in all vertical, Horizontal and both diagonals. Yes. It is a 8 x 8 Magic square also.

Generally a magic square is a square of any size “n x n ” filled with numbers. And after filling the numbers the Vertical, Horzontal and both diagonal totals must be equal.

In general the row total will be smallest number added with the highest number and divided by two, and then multiplied by the number of rows.

This is the minimum condition for any magic square in general.

In this above single square Magic square,

The vertical total is ONE, the Horizontal total is ONE and both Diagonal totals are also ONE

Finally as per the total formula also, 1 + 1 = 2 / 2 = 1 x 1 = 1.

It is satisfying all the conditions of a magic square.