Like a normal horsey, but the square it leaves behind remains on fire, destroying the next piece to land on it.

Only the most recent square it was on remains on fire.

IMO the NUL-delimited options are by far the biggest win for shell scripting. $' ' will be the most commonly used addition, but "$(printf '...')" was always an option before. You don’t really have an alternative read -d ''.

If you’re looking for legitimate advice, you’re in the wrong community. Anarchychess is for chess memes.

That said, what my noob brain sees:

• it attacks white’s c pawn
• it activates black’s queen
• it prevents Qa4+, allowing black to castle

Edit: Qa4, not Qh4