user10804: When a pawn reaches the opposing side it can be promoted. Given that the most advantageous choice of promotion is to a Queen I have 3 questions. 

Does this mean that the newly promoted piece (e.g. Queen) stays on the opposing side and can attack from the rear?
Does this mean (hypothetically) that there can be 3 Queens on the board?
How does one represent the newly promoted Queen if there are still 2 on the board?


user10810: 
Yes, it will behave just like any other queen.
There can be up to 9 queens on each side -- one for each potential pawn promotion and 1 original one.
Just find a queen of the same colour from a different set.


user7297: 
Yes, it is in all facets equal to an original queen of the same color as the pawn.
Yes, in fact this happens quite often, even among grandmaster. There are even cases known where there were 6 queens on the board!
In official games, you'll need a queen from another chess set. In casual games, you could put a rook upside down. Don't do this in tournament games - the piece will be considered to be a rook. If there's no queen available, stop the clock and call the arbiter.


10804: <p>When a pawn reaches the opposing side it can be promoted. Given that the most advantageous choice of promotion is to a Queen I have 3 questions. </p>

<ol>
<li>Does this mean that the newly promoted piece (e.g. Queen) stays on the opposing side and can attack from the rear?</li>
<li>Does this mean (hypothetically) that there can be 3 Queens on the board?</li>
<li>How does one represent the newly promoted Queen if there are still 2 on the board?</li>
</ol>
 10810: <ol>
<li>Yes, it will behave just like any other queen.</li>
<li>There can be up to 9 queens on each side -- one for each potential pawn promotion and 1 original one.</li>
<li>Just find a queen of the same colour from a different set.</li>
</ol>
 7297: <ol>
<li>Yes, it is in all facets equal to an original queen of the same color as the pawn.</li>
<li>Yes, in fact this happens quite often, even among grandmaster. There are even cases known where there were <a href="https://timkr.home.xs4all.nl/records/recordstxt.htm#Most%20queens" rel="nofollow">6 queens</a> on the board!</li>
<li>In official games, you'll need a queen from another chess set. In casual games, you could put a rook upside down. Don't do this in tournament games - the piece will be considered to be a rook. If there's no queen available, stop the clock and call the arbiter.</li>
</ol>
