You must know this to move a piece:
E=mc^2

You must know this to move a piece:
hahah
If this is a serious question, it doesn't relate to physics. Unless the moving of pieces is considered kinetics. But even then who cares as long as you move the piece :)

There are several concepts in chess that are loosely related to the laws of physics.
From physics, we learn that matter can be converted into energy (E=mc^2). Likewise in chess, one may give up material (a pawn or a piece), in order to gain a tempo or two, thus "energizing" one's position.
In physics, entropy is a measure of disorder. The second law of thermodynamics states that the entropy of a system will not decrease. Likewise, in chess, the starting position is the least complicated one you'll ever get on the board. Once the first move is made, things will get more complicated...
Based on their lattice structure, some physical materials are harder than others. In chess, the pawn structure plays a similar role. A pawn chain will help in stabilizing the position, as opposed to a bunch of isolated pawns.
In physics, the importance of forces varies with distance. For example, gravity matters over large distances, and does not really matter on the subatomic level. Conversely, the weak and strong nuclear forces are important on the subatomic level, and are irrelevant over long distances. In chess, the rooks and the king do not really matter that much in the opening, but become key players in the ending...

kleelof technically then you are lighter.
Is that a paradox?
10 Butterfinger points to anyone who can tell me what Bart Simpson says about paradox.

No two pieces can occupy the same square at the same time - Wolfie Pauli (1925)
Newton's 3rd Law of Chess: For every woodpushing fool there's an equal and opposite fool.

There are several concepts in chess that are loosely related to the laws of physics.
From physics, we learn that matter can be converted into energy (E=mc^2). Likewise in chess, one may give up material (a pawn or a piece), in order to gain a tempo or two, thus "energizing" one's position.
In physics, entropy is a measure of disorder. The second law of thermodynamics states that the entropy of a system will not decrease. Likewise, in chess, the starting position is the least complicated one you'll ever get on the board. Once the first move is made, things will get more complicated...
Based on their lattice structure, some physical materials are harder than others. In chess, the pawn structure plays a similar role. A pawn chain will help in stabilizing the position, as opposed to a bunch of isolated pawns.
In physics, the importance of forces varies with distance. For example, gravity matters over large distances, and does not really matter on the subatomic level. Conversely, the weak and strong nuclear forces are important on the subatomic level, and are irrelevant over long distances. In chess, the rooks and the king do not really matter that much in the opening, but become key players in the ending...
Sooner or later everything relates to physics but sometimes not as we think. Right now the biggest mystery in physics is quantum gravity, which is assumed to exist but up until now no experiments have been successful in finding it. Gravity is the curvature of space and there is space at the quantum level, therefore gravity must be there.

i dont know but i very happy i comment in first
page !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! so stupid not so much????????
purely irrelavnent to topiv right ???????????????? i is stupid

i would guess no it doesn't from the meaning of e=mc^2.
heres where i got the info
http://dictionary.reference.com/browse/e+%3D+mc2
Does chess relate to physics ?How does chess relate to physics ?