Ask HN: Is synthetic data generation practical outside academia?
3 points by cpard 3h ago 2 comments
Ask HN: Has anybody built search on top of Anna's Archive?
283 points by neonate 3d ago 146 comments
Show HN: Reverse Pac-Man
78 Eagle64 47 5/5/2025, 12:17:11 PM reverse-pacman.staticrun.app ↗
Keep one eye on the first ghost and the other on the second
As it is, it feels like you are checking for key press (not key down) in a narrow window when the ghost reaches the intersection. That is very hard to play. It is much more forgiving if I can press and hold the key whenever I want.
http://48k.ca/bacman.html
[1] https://archive.org/details/Crazy_Chicky_1981_VTL
- Obviously, you "emit" dots and fruit and power pellets as you traverse the grid.
- Less obviously, once you populate a dot/fruit/power pellet onto a grid square, you can't visit that position again — as, if reversed, that'd look like you going over those things without collecting them.
- You'd randomly enter the powered-up state, and you'd then have to visit one of the unpopulated power-pellet grid positions in order to emit the power pellet to get out of that state — before the powered-up-state timer expires. (The power-up-state going on longer than that is invalid!)
- While in the powered-up state, you'd see pairs of ghost eyes unavoidably approaching you; they'd touch you, turn into ghosts, and then flee from you. That's fine. But once they become ghosts and move off of the grid-space you occupy, you can't touch them again.
A series of levels where you are given a score at the beginning. You must find the path around the map that brings your score exactly to zero, using reverse Pac-Man scoring rules (each dot you lay reduces your score by 10, etc). If you reach zero with more dots to lay, or finish laying down all dots without reaching zero, you die (as those would also be invalid states).
Recording input for these challenge runs would be a cool idea too, as you could have the option to watch the run "forwards" for further entertainment. To lessen the difficulty a little bit, the player could even have access to the "forward" version of a run that completes the desired score target (with appropriate bonuses for players who don't utilize the "hint" run).
https://en.m.wikipedia.org/wiki/Pac-Man_Vs%2E
https://specularrealms.itch.io/the-twins-of-caduceus
Fair warning: It's a game made for people who excel at ambidextrous tasks like patting one's head and rubbing one's tummy, or juggling Rubik's cubes that you are also solving.
In the 1980s it was pretty common to have 2-player games with both players on the same keyboard.
Edit: Spacewar (see https://archive.org/details/msdos_Spacewar_1985) is an example of a two-player-on-one-keyboard game, from 1985.
https://www.mobygames.com/game/69231/destruction-zone/
man that takes me back
[1] https://bobs-stuff.itch.io/one-little-ghost
[2] https://www.youtube.com/watch?v=Rq2hOlC97SQ
[1] https://en.wikipedia.org/wiki/Pac-Man_Vs.
(trailing dot escaped via %2E)
It's a quick play and the game is pretty good, I recommend experiencing it.
And the music was by Gustaf Grefberg, "Lizardking", my favorite oldskool demo musician by a mile.
You can play it single player too and have an experience similar to this.
https://www.freeindiegam.es/2012/12/swap-box-turbo-nifflas/
Secure Connection Failed
An error occurred during a connection to reverse-pacman.staticrun.app. PR_END_OF_FILE_ERROR
Also, I noticed that he often circles around the upper left area a few times at the start even though there are no dots to collect.
Gemini wasn't clever enough to disallow ghosts changing directions mid-way, but it did do a smart thing with "pellets remaining" scoring.
Prompt: Create a game of Pacman with only 2 ghosts. Instead of the player controlling pacman, the player controls the ghosts.
Controls: Ghost 1 (Red): WASD or ZQSD Ghost 2 (Cyan): Arrow Keys