They are coming

Question

I've just found this solemn poem, entitled "They are coming." Unfortunately, the name of the author has been lost. However, I am confident that the poem contains enough information to identify the author. Can you help?

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They are coming.
_{(author unknown)}

I am so powerful, but I am frail.
My allies surround me, but my enemies grow near.
I am afraid that soon, all will fail.
My troops are thinning. There is much fear.

They are coming.

The world is mine... but I can hardly walk.
I look up and see nothing but my foe's baleful stare.
The priests are dead. I can almost hear them talk.
A sound startles me, but it is only the whinny of a mare.

They are coming.

The clock is ticking. Time is running out.
The enemy is organizing. We are surrounded. I must fight.
The clunk of wood and shattering of stone rings like a shout.
The endless battle. The never-ending war of dark against light.

They are coming.

Answer 1

Is this about

A chess game?

Clues:

I am so powerful, but I am frail.

My allies surround me, but my enemies grow near.

Describe the King, which is the most powerful piece but can only travel one square at a time. At the beginning of the game he is surrounded by pieces of the same color

The priests are dead. I can almost hear them talk.

A sound startles me, but it is only the whinny of a mare.

The bishop and the knight

The clock is ticking. Time is running out.

Refers to a timed chess game

The enemy is organizing. We are surrounded. I must fight.

Probably refers to the endgame or a mating pattern that requires the king to move

The clunk of wood

Chess pieces are often made of wood

shattering of stone

Refers to the Rook

The never-ending war of dark against light.

Black pieces and white pieces