Consider Mind Chess. Two players face each other. One says "Check." The other says "Check." The first says "Check." This continues until one of them says, instead, "Checkmate." That player wins -- superficially. In fact, the challenge is to put off checkmate for as long as possible, while still winning. This may be better stated: you truly win Mind Chess if you call "Checkmate" just before your opponent was about to.
I also lost the game not too long ago, but before that, I think I didn't actually lose it for a decade of more? And losing it wasn't even because it was mentioned anywhere, I genuinely just thought of it by myself, after forgetting about it for so long.
So my sincerest apologies if my comment just made any readers lose their long streak in the game.
Like, five or so losses this year.
i just lost the game.
Is it just a joke?
The score value starts at 1. Every additional "check" multiplies the score value by 2 (so 2, 4, 8, 16...). The first player to say "checkmate" receives the score. Track your summed score between games; the player with the highest overall score at any given time is "winning."
Then the game at least has a chance to develop some mechanics. Players who delayed longer have a chance at winning more points. They also might be challenged more…
You can leave at any time by breaking the rule, but then you will be playing with other people who say checkmate immediately, and that would be much worse.
Being prosocial is in fact a stable equilibrium. As prophecized by gestures broadly at everything.
Both players choose a card. Players then in turns reveal their card, and if Check, make another choice. The player first revealing Checkmate wins if their opponent's currently-chosen card is also a Checkmate.
1: P1 selects 2: P2 selects 3: P1 reveals 4: P1 selects 5: P2 reveals 6: GOTO 2
I.e. each player always selects immediately before their opponent reveals.
If P2 picks check the first time, then they're done. At any point after if they pick checkmate, since P1 has checkmate selected they will reveal it and P2 will lose.
It seems like a poorly thought through game...
I do wonder how things would change if the board were 9 cells long; 10 cells long; etc. Also, it seems "in the spirit" to permit castling if neither K nor R has moved yet: i.e., from the position
K _ R N r _ n k
White ought to be permitted to
_ R K N r _ n k
(Or maybe there's a stronger argument for R K _ N r _ n k, actually. The former was conceptually "rook moves halfway toward king, then king moves to the other side of rook"; but the latter is "rook moves two steps in king's direction while king moves to the other side of rook.")
I'm pretty sure this wouldn't change the analysis on the 8-cell board at all, though. I wonder if it would change the analysis on any size of board.
Though maybe in that case the best first move for both is to castle and we are non the wiser (back to the original starting position)
Reminds me of SFCave and Nanana Crash for the simplicity and surprising replay ability.
https://megami.starcreator.com/nanaca-crash/
(Failing to find an online version of SFCave a.t.m :'()
Incidentally, there is an actual 1D game that is one of the most popular games on the planet: Backgammon.
You could play with pieces that have a value of 1..N instead. Starting with 2,3, and 5 value pieces, and splitting them as needed. Making it one-dimensional again, while keeping 100% of the rules.
Final verdict, therefore: backgammon is 1D, not 1.5.
We could pretend that the second dimension was not playing a role in tactics back then, since it was very recently invented, like the brothers Wright invented the third dimension a hundred years ago. Or some hot air balloon at a world faire did it.
I'm fine calling Backgammon 1.5-D. Physically you focus on a single dimension, and the second one matters too but it's not the same.
E.g. a pawn can move exactly 8 squares towards its opponents end (16 on its first move if no piece occupies 8 squares away), but can only capture 7 or 9 squares forward (with some extra modulo math to prevent wrapping)
K - King H - Knight R - Rook E - Enemy King X - Empty
K X X X R K E X
But it indicates it’s a draw by stalemate.
There is only 1 legal move for black here. Which is to move back to X. If it takes my Knight rook gets it.
He moves back, I move my Knight out of the way. Checkmate.
Edit: oh wait nvm there’s no legal move for black.
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.
If 1. Rx6,it is stalemate. So it must be 1. N4 N5. Then we could proceed with, 2. Nx6+ K7. Now, if you capture the knight (Rxe), it is stalemate again. So sacrifice the knight, 3. R4 Kx6 so that you force black to zugzwang with 4. K2 K7, and finally, 5. Rx5#
Some observations:
* Knights are color bound
* You can mate with Knight & King (K+K is still insufficient material)
* 3 fold repetition still applies (and has a popup!)
Since this makes it harder for the player with an early advantage to win (by constraining their moves), it is considered a feature, not a bug.
Have not even lost a piece yet!
So black is not in check and has no legal moves, so stalemate.
Isn't this the definition of checkmate, not stalemate?
> Leaving one’s own king under attack, exposing one’s own king to attack and also ’capturing’ the opponent’s king are not allowed.
N6 and K8 both expose the black king to attack, so black is not allowed to make those moves. And with no other options, black has no legal move.
And since black isn't in check where they are right now – that's a stalemate.
1. N4 N5
2. Nx6+ K7
3. R4 N3+!
4. K2 N5
5. N8! Kx8
6. Rx5#
- RxN RxR, N5 (unique), RxN 1-0
- R5, R2 RxN (if R6, NxR, 1-0), RxR N5 (unique), RxN, 1-0
... N5 NxR+ K7 (unique), R4 KxN (if N3+, K2 N5, N8 KxN, RxN 1-0), R2 K7 (or N3, RxN 1-0), RxN (1-0)
Would enjoy so much if there were more of these, feels like an obligation-free chess puzzle.
There are probably other ways to win too.
(I would pay a lot for some fat 1500 page, leather-bound tome of wisdom and anecdotes about historical foot guns, by Carl von Clausewitz, titled "1D Chess". And it's inevitable multi-authored, Harvard-published much thicker contemporary-world sequel.)
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.
Translating your notation to normal chess notation:
White king on h1, black rooks on a2 and g8, black king in some random other place, white to move.
That is a draw, because white is NOT in check, but has no legal moves. That scenario is called stalemate. If white were in check, it would be checkmate and a win for black. Set it up on any chess analysis board website and it will say the game is a draw.