I have a feeling there are quite a few of us with more than one degree in History here.
who invented the chess and when?

Between modern chess with the mad queen and virile bishop, on the one hand, and chaturanga, on the other hand, is the game of chess that I brought to Europe in the ninth century (according to the calendar of infidels). That game was truly chess, albeit different from the modern version. The rukhs were the most powerful piece in the old chess. That game, H.J.R. Murray determined to my satisfaction, originated in India, where it grew from a similar game known as chaturanga.

I think you are right sun777. One thing I don't understand is why so much anger about something no one really knows. can it be proved? No. It's just something to talk about.

Some say India, some China, Persia, later European, but no one knows for sure, am I right?
India almost certainly. China is a long shot.
C'mon folks. We're not talking about cutting edge research. Even Wikipedia is close to accurate on this question.
https://books.google.com/books/about/A_History_of_Chess.html?id=VBYLAAAAIAAJ

I believe the correct answer is all of the above!
Chess as we know it would not exist with out the evolution it has gone through.

and was a feat of engineering which makes everything else in asia such as the pyramids
Egypt is part of Asia?!? Always thought it was in northern Africa...gee, you learn something new everyday on this site.

Well, there are ziggurats in SW Asia, and beautiful temples in southern India such as Srirangam temple that are somewhat similar to pyramids. After all, the basic design of a pyramid is pretty simple and common throughout the world.
But yeah. The term "pyramid" generally refers to one archetectural type, found in Egypt and the Sudan.

Yeah, I know, LQ.
5oS tends to move goalposts when his statements are clearly wrong.
Most of the ancient Greeks considered the Nile to be the boundary between Asia and Africa. But there's absolutely no reason to accept their distinctions today.

I'm kind of glad I bailed on this thread.
I kind of feel dumb now. I'm just a chemist :(
OTOH I wrote my own papers. just sayin'
----
anyways I think all those wanderin ethopian primates have done some pretty neat things. I don't get whats so special about the small group of them that have wandered into a relatively contentious and small landmass.
for sure they made a lot of war, wrote a lot of books and terrorized a lot of other lands.
In fact, there Were SO argumentative (with each other). does it make sense to even group them together at all?

Not much is known
Of early days of chess beyond a fairly vague report
That fifteen hundred years ago two princes fought
Though brothers, for a Hindu throne
Their mother cried
For no-one really likes their offspring fighting to the death
She begged them stop the slaughter with her every breath
But sure enough one brother died
Sad beyond belief
She told her winning son
You have caused such grief
I can't forgive this evil thing you've done
He tried to explain
How things had really been
But he tried in vain
No words of his could mollify the queen
And so he asked the wisest men he knew
The way to lessen her distress
They told him he'd be pretty certain to impress
By using model soldiers on
A chequered board to show it was his brother's fault
They thus invented chess!
Chess displayed no inertia
Soon spread to Persia, then west
Next the Arabs refined it,
Thus redesigned, it progressed
Still further yet
And when Constantinople fell in 1453
One would have noticed every other refugee
Included in his bags a set
Once in the hands
And in the minds of leading figures of the Renaissance
The spirit and the speed of chess made swift advance
Through all of Europe's vital lands
Where we must record
The game was further changed
Right across the board
The western touch upon the pieces ranged
King and queen and rook
And bishop, knight and pawn
All took on the look
We know today, the modern game was born
And in the end
We see a game that started by mistake in Hindustan
And boosted in the main by what is now Iran
Become the simplest and most complicated pleasure
Yet devised for just the kind of mind who would appreciate
This well researched and fascinating yarn.

If you guys are so good at math, factor the quadratic.
x^2-10x+25
I could factor x^2-10x +24 or -x^2-10x+25.
The math for your equation is messy. It's something like: x =(-10-√200)/2=-5-5√ 2 = -12.071 and
- x =(-10+√200)/2=-5+5√ 2 = 2.071
(I had to copy and paste that solution.)
In othe words, your trinomial couldn't be factored.
...it is true that the best Indian food is in London not in India...
Clearly I went to the wrong London restaurant. I've found better Indian food in Spokane than I had in London. OTOH, the Turkish food in London was terrific. We don't have a Turkish restaurant in Spokane.
We did limit our culinary adventures to Bloomsbury.
I gotta say, the very best Indian food I ever had was in London. It was a little hole in the wall and the owners loved that fact that we actually enjoyed spicy food. They brought dish after dish out for us to try. I've never been so spoiled, and that includes a Michelin 2-star restaurant on the Loire.
I fully believe the best Indian food may well be in London. But you gotta look for it.I'm sure there are bad Indian restaurants there, just as everywhere.