Yes! that one!. I have a paper copy, so it didn't occur to me that there would be an online version
Sn0wCoder 291 days ago [-]
Going to tell the Preface story tomorrow at work, I guess if your reading this you now know my HN handle ;) Not sure I will do the 'game' but that into was worth clicking the link.
rickydroll 291 days ago [-]
> I guess if your reading this you now know my HN handle
No worries. A great philosopher once wrote:
"There is a theory which states that if ever anyone discovers exactly what your HN handle is for and why it is here, it will instantly disappear and be replaced by an HN handle even more bizarre and inexplicable."
agiacalone 291 days ago [-]
I also heard:
"There is another theory which states that this has already happened..."
291 days ago [-]
nottorp 291 days ago [-]
Yep. That's how I passed my Prolog course as well :)
hazymemory 291 days ago [-]
Just for curiosity I just asked chat deepseek to load and solve the game and it solved it in half a second.
It suggested adding some riddle, for example:
path(castle, up, tower) :-
at(blueprint, holding),
(solved_riddle -> true ;
write('Answer the riddle first: What walks on four legs in the morning...?'), nl,
read(Answer),
(Answer = 'human' -> assert(solved_riddle) ;
write('Wrong! Try again.'), nl, fail)).
ForOldHack 291 days ago [-]
If you wrote an adventure game in Prolog, you could write a client that would also solve the adventure.
ooopdddddd 291 days ago [-]
That's only if you are using pure predicates.
From a quick glance, the code makes liberal use of assert, retract, and the cut operator, so you can't write a query that solves the problem automatically.
mcv 291 days ago [-]
I can imagine it's easier to write that client in Prolog than the adventure.
johnisgood 291 days ago [-]
Or write a program that generates the adventure game!
wfurney 291 days ago [-]
I have never heard of Prolog before so this was cool. I did think the "make sure the flashlight is turned on" point was kind of confusing. I have the battery and flashlight, but there's no way to turn it on. I couldn't run it with gprolog but swipl works fine.
klibertp 291 days ago [-]
The flashlight should be automatically on in this case:
This condition is checked when you try to reach "woods" and "woods_1". (And that's the only place you can test if the flashlight is on, because it's otherwise not checked and doesn't change any of the descriptions.) The flashlight doesn't save you from dying in the "deepforest_X".
Good catch! Although I do have some README.md templates where I use "yourusername" or whatever. I bet it would be said it was generated by an LLM. :/ Oh well, it still would take someone skilled to have it made by an LLM anyways. :D
klibertp 291 days ago [-]
I only learned Prolog as a hobby, so I may be mistaken, but the quality of the code seems really bad? Starting from keeping game state in a bunch of magic globals (assert/retract everywhere), to a lack of input parsing (even though DCGs would be a perfect match), to comments that disagree with the code[1], to the game logic coupled with game mechanics as side effects (the winning condition is checked inside `take`)... I may be too used to Prolog code from books and tutorials, but the number of cuts also seems much larger than expected.
...now that I look at this, it's 3 years old. I wonder how much better today's LLMs would fare?
Cool! I got stuck trying to figure out how to turn on the flashlight and then got stuck in the woods and died.
twothamendment 291 days ago [-]
When I was in school I had to do some stuff with prolog. I got my wife interested enough that she added some rooms and items to a game like this. Good times!
johnisgood 291 days ago [-]
I love text-based adventure games in Prolog.
mparnisari 291 days ago [-]
I can't get this game to start, am I stupid?
$ swipl -s treasure_hunt.pl
and then what?
klibertp 291 days ago [-]
-▶ swipl -s treasure_hunt.pl
Welcome to SWI-Prolog (threaded, 64 bits, version 9.2.9)
SWI-Prolog comes with ABSOLUTELY NO WARRANTY. This is free software.
Please run ?- license. for legal details.
For online help and background, visit https://www.swi-prolog.org
For built-in help, use ?- help(Topic). or ?- apropos(Word).
?- start. % <- this
Enter commands using standard Prolog syntax.
Available commands are:
start. -- to start the game.
up. down. right. left. -- to go in that direction.
...etc...
mparnisari 290 days ago [-]
Thanks!
291 days ago [-]
Rendered at 11:24:28 GMT+0000 (Coordinated Universal Time) with Vercel.
https://github.com/Dialog-IF/dialog/
https://linusakesson.net/dialog/
https://github.com/agiacalone/cecs-342-lab-prolog
It's a lot of fun to work through, other prolog resources can be a little dry
[0] https://amzi.com/AdventureInProlog/
No worries. A great philosopher once wrote:
"There is a theory which states that if ever anyone discovers exactly what your HN handle is for and why it is here, it will instantly disappear and be replaced by an HN handle even more bizarre and inexplicable."
"There is another theory which states that this has already happened..."
It suggested adding some riddle, for example:
[1] https://github.com/stefanrodrigues2/Prolog-Adventure-game/bl...
...now that I look at this, it's 3 years old. I wonder how much better today's LLMs would fare?
[1] https://github.com/stefanrodrigues2/Prolog-Adventure-game/bl... - no, the routine does not "wait" on Windows, you'd need to put `get_char(_)` or something before `halt`.
$ swipl -s treasure_hunt.pl
and then what?