Show HN: Brain Frog – Can you be random enough for 11 lines of JavaScript?

https://brainfrog.lol

by AlexanderZ • 1 month ago

49 44 1 month ago

brainfrog.lol

sscaryterry2• 1 month ago

That was fun, got up to 79 :)

AlexanderZ15• 1 month ago

practice mode? the record for ranked matches is 64

sscaryterry2• 1 month ago

Yes

momoraul• 1 month ago

46 and that was my ceiling. frogs smarter than me.

AlexanderZ15• 27 days ago

plot twist: there is no frog, it's all your internal biases (what you do after success/failure)

uberex• 1 month ago

Free?!. Is there a "call us" SSO enabled plan?

andai• 1 month ago

Woah, neat. Is this like, a Markov chain?

AlexanderZ15• 29 days ago

a variation of Aaronson Oracle

jv22222• 1 month ago

How many pixels wide is the hit zone?

AlexanderZ15• 29 days ago

you don't have to aim

vyrotek• 1 month ago

Bam! 50 on the first try. Fun.

AlexanderZ15• 29 days ago

nice! try playing it the first thing every morning, it really wakes up your brain

digitalWestie• 1 month ago

Just wanted to give the little guy a hug

ozyschmozy2• 1 month ago

Why does a silly little online game need my email to send a one-time login code? What a strange experience

AlexanderZ15• 29 days ago

because it doesn't? practice mode requires no login. if you want to play a ranked match then you'll need an account, how else could it work?

ozyschmozy2• 29 days ago

Practice mode also has a popup telling you what to do which seems to negate the point of the game?

applfanboysbgon• 28 days ago

how else could it work?

Username+password. There is zero reason to require e-mail for account creation.

hash0• 29 days ago

I got 50 hits in 100 tries. That being said, I did not particularly like hitting that poor frog :'( Yes, I am the kind of player who would never choose the rude option when talking to an NPC.

user-• 28 days ago

I am briefly in the top ten after completely misunderstanding the rules nicee

thih9• 28 days ago

The ultimate unpredictability.

freakynit• 27 days ago

"To confuse your enemy, you must first confuse yourself"

  - Some reddit guy

AlexanderZ15• 27 days ago

what's your score?

brtkwr• 28 days ago

Would be fairer if the frog occasionally got to throw a punch or two...

pjio• 28 days ago

In the first round I struggled to notice if I missed. The frog punching back would be a good indicator. And I wouldn't feel so guilty for punching a pacifist frog.

AlexanderZ15• 27 days ago

On my todo list: when the frog wins, it runs towards you and knocks you out, haha

IdiotSavage• 28 days ago

If you want to see what a random distribution looks like:

  jot -r 100 0 1 | rs -t 10

I noticed my "fake randomness" is lacking long sequences of the same key. I feel like I'm "predictable" when I press the same key 5 times in a row, yet that happens a lot in a truly random distribution.

AlexanderZ15• 27 days ago

With Brain Frog I went even further - it doesn't actually check L/R. Instead, it checks what you do after a landed/blocked punch (some people tend to switch after a block, others insist on hitting the same side until they land a hit).

jmpavlec• 28 days ago

Looks like the leaderboard was hacked unfortunately. Fun little concept.

AlexanderZ15• 27 days ago

Fixed it. The fun part is there is no real protection against bots/AI and the code works as expected - they EASILY score 100. It's the humans that are too predictable.

mike_hock• 28 days ago

You should make one where you can play against the branch predictors of various processors.

rllj• 28 days ago

I was just about to comment the same! Sadly, branch predictors are incredibly well guarded secrets, mostly.

escanor3• 28 days ago

pure random player:

  (async function(punch, delay) {
    async function sleep(ms) {
      return new Promise((resolve, _) => {
        setTimeout(resolve, ms)
      })
    }
    
    for (let i = 0; i < 100; i++) {
      punch(['L', 'R'][(Math.random() * 2) | 0])
      await sleep(delay)
    }
  })(punch, 150)

"cheating" player:

  (async function(oracle, punch, delay) {
    async function sleep(ms) {
      return new Promise((resolve, _) => {
        setTimeout(resolve, ms)
      })
    }
    
    for (let i = 0; i < 100; i++) {
      punch((i + 1) < oracle.minForPrediction ? ['L', 'R'][(Math.random() * 2) | 0] : oracle.predictNextPunch() === 'L' ? 'R' : 'L')
      
      await sleep(delay)
    }
  })(oracle, punch, 150)

is it possible to do any better? i haven't fully read frog/oracle code

escanor3• 28 days ago

it is:

  (async function(oracle, punch, delay) {
    async function sleep(ms) {
      return new Promise((resolve, _) => {
        setTimeout(resolve, ms)
      })
    }
    
    for (let i = 0; i < 100; i++) {
      const state = oracle._state
      const block = oracle.predictNextPunch()
      oracle._state = state
      
      punch(block === 'L' ? 'R' : 'L')
      
      await sleep(delay)
    }
  })(oracle, punch, 150)

emrtnn• 28 days ago

Less fancy hack here, intercept the prediction function on every punch and force the frog to take the opposite side. const realPunch = punch;

punch = function(myMove) {

  oracle.predictNextPunch = function() {
    return myMove === 'L' ? 'R' : 'L'; 
  };
  
  realPunch(myMove);

};

escanor3• 27 days ago

brilliant!

ramon1562• 28 days ago

Leaderboard has been overtaken :(

AlexanderZ15• 27 days ago

Fixed it. Elon Musk had too much time on his hands

ramon1562• 27 days ago

Kudos!

subarctic• 27 days ago

Curious how a couple people got >100 hits on 100 punches

AlexanderZ15• 27 days ago

some people went on to explore the code limits, hehe. it's been fixed

krussikas• 27 days ago

I once coded a rock-paper-scissors game that you can play against a tree based matcher/learner, with symmetry between the options accounted for. Pretty similar idea-wise. To be honest, it was pretty hard to get a better than random score.

AlexanderZ15• 27 days ago

By the way, there is an ios app: https://apps.apple.com/app/id6755528165

Show HN: Brain Frog – Can you be random enough for 11 lines of JavaScript?

Related Stories