1D Chess • Hacker News Board

Re: 1D Chess

#31

Post by addybojangles » Fri, Apr 10, 2026, 5:39 PM UTC

Silly nice brain teaser

Re: 1D Chess

#32

Post by aNapierkowski » Fri, Apr 10, 2026, 5:39 PM UTC

northfield27 wrote: post #12

Haha, i was taking N4 and N6, but didn’t figure the steps after that. To win we need to let knight die because rook can move multiple steps to kill the king. From a third person perspective R2 is a deceptive move that takes advantage algorithm to make the black king back off to kill its knight.

you could also just move your king on that move same result knight cant move, only king can, so it has to back away

Re: 1D Chess

#33

Post by BiraIgnacio » Fri, Apr 10, 2026, 5:48 PM UTC

love it!

Re: 1D Chess

#34

Post by amrrs » Fri, Apr 10, 2026, 5:49 PM UTC

juleiie wrote: post #28

That finally confirmed that I am too regarded for chess if even 1D is too hard yay

is that str.replace(g,t) ?

Re: 1D Chess

#35

Post by tempestn » Fri, Apr 10, 2026, 5:52 PM UTC

That's actually a fun little puzzle.

Re: 1D Chess

#36

Post by darepublic » Fri, Apr 10, 2026, 5:55 PM UTC

I won after four attempts. Pretty sure it was perfect play so yes white has forced win

Re: 1D Chess

#37

Post by hart_russell » Fri, Apr 10, 2026, 5:56 PM UTC

I don’t know why this is stalemate: N4 N5, N6 K7, R5. Wouldn’t rook have the king in checkmate?

Re: 1D Chess

#38

Post by _air » Fri, Apr 10, 2026, 5:58 PM UTC

hart_russell wrote: post #37

I don’t know why this is stalemate: N4 N5, N6 K7, R5. Wouldn’t rook have the king in checkmate?

Black has no legal moves because of the knight but they aren't in check

Re: 1D Chess

#39

Post by Scarblac » Fri, Apr 10, 2026, 5:58 PM UTC

hart_russell wrote: post #37

I don’t know why this is stalemate: N4 N5, N6 K7, R5. Wouldn’t rook have the king in checkmate?

The rook doesnt attack the king because N6 is in the way.

So black is not in check and has no legal moves, so stalemate.

Re: 1D Chess

#40

Post by burnt-resistor » Fri, Apr 10, 2026, 5:58 PM UTC

vladde wrote: post #10

i could not beat it, and i can't read that chess notation

There's a coordinate-based solution in the source code issues. I couldn't elucidate that notation either.

https://github.com/Rowan441/1d-chess/issues/1

Edit: There's a second solution where instead of moving the rook back 2, move the king forward one and the take the black knight with the rook as the checkmate move.