Hanabi/hanabi.rs
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Slight changes to be more information-efficient

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- If a player discards because nobody else needed a hint, that
  information is "transmitted" before they transmit other info through
  hat stuff.
- The "card possibility partition" questions now take into account info
  learned through earlier questions.
This commit is contained in:
Felix Bauckholt 2019-03-04 18:53:20 +01:00
parent 493631dad0
commit 8ed01d47ca
2 changed files with 25 additions and 27 deletions
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4
README.md
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@ -73,5 +73,5 @@ On the first 20000 seeds, we have these average scores and win rates:
|---------|---------|---------|---------|---------|
| cheat | 24.8594 | 24.9785 | 24.9720 | 24.9557 |
| | 90.59 % | 98.17 % | 97.76 % | 96.42 % |
| info | 22.2908 | 24.7171 | 24.8875 | 24.8957 |
| | 09.40 % | 79.94 % | 91.32 % | 91.83 % |
| info | 22.3427 | 24.7488 | 24.9055 | 24.9051 |
| | 10.23 % | 81.67 % | 92.53 % | 92.62 % |

44
src/strategies/information.rs
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@ -420,6 +420,12 @@ impl MyPublicInformation {
})
}
fn knows_dead_card(&self, player: &Player) -> bool {
self.hand_info[player].iter().any(|table| {
table.probability_is_dead(&self.board) == 1.0
})
}
fn someone_else_needs_hint(&self, view: &OwnedGameView) -> bool {
// Does another player have a playable card, but doesn't know it?
view.get_other_players().iter().any(|player| {
@ -514,7 +520,7 @@ impl PublicInformation for MyPublicInformation {
fn ask_questions<Callback>(
&self,
_player: &Player,
me: &Player,
hand_info: &mut HandInfo<CardPossibilityTable>,
mut ask_question: Callback,
mut info_remaining: u32,
@ -522,25 +528,21 @@ impl PublicInformation for MyPublicInformation {
// Changing anything inside this function will not break the information transfer
// mechanisms!
let augmented_hand_info = hand_info.iter().cloned().enumerate()
let compute_augmented_hand_info = |hand_info: &HandInfo<CardPossibilityTable>| {
hand_info.iter().cloned().enumerate()
.map(|(i, card_table)| {
let p_play = card_table.probability_is_playable(&self.board);
let p_dead = card_table.probability_is_dead(&self.board);
let is_determined = card_table.is_determined();
(card_table, i, p_play, p_dead, is_determined)
})
.collect::<Vec<_>>();
.collect::<Vec<_>>()
};
let known_playable = augmented_hand_info.iter().filter(|&&(_, _, p_play, _, _)| {
p_play == 1.0
}).collect::<Vec<_>>().len();
let known_dead = augmented_hand_info.iter().filter(|&&(_, _, _, p_dead, _)| {
p_dead == 1.0
}).collect::<Vec<_>>().len();
if known_playable == 0 { // TODO: changing this to "if true {" slightly improves the three-player game and
if !self.knows_playable_card(me) { // TODO: changing this to "if true {" slightly improves the three-player game and
// very slightly worsens the other cases. There probably is some
// other way to make this decision that's better in all cases.
let augmented_hand_info = compute_augmented_hand_info(hand_info);
let mut ask_play = augmented_hand_info.iter()
.filter(|&&(_, _, p_play, p_dead, is_determined)| {
if is_determined { return false; }
@ -578,7 +580,7 @@ impl PublicInformation for MyPublicInformation {
// find a playable card, and conditional on that,
// it's better to find out about as many non-playable
// cards as possible.
if rest_combo.info_amount() < info_remaining && known_dead == 0 {
if rest_combo.info_amount() < info_remaining && !self.knows_dead_card(me) {
let mut ask_dead = augmented_hand_info.iter()
.filter(|&&(_, _, _, p_dead, _)| {
p_dead > 0.0 && p_dead < 1.0
@ -603,6 +605,8 @@ impl PublicInformation for MyPublicInformation {
}
}
// Recompute augmented_hand_info, incorporating the things we learned when asking questions
let augmented_hand_info = compute_augmented_hand_info(hand_info);
let mut ask_partition = augmented_hand_info.iter()
.filter(|&&(_, _, _, p_dead, is_determined)| {
if is_determined { return false }
@ -883,19 +887,14 @@ impl InformationPlayerStrategy {
return TurnChoice::Hint(hint);
}
// We update on the discard choice before updating on the fact that we're discarding to
// match pre-refactor behavior.
// TODO: change this in the next commit!
let discard_info = if public_useless_indices.len() > 1 {
Some(public_info.get_hat_sum(public_useless_indices.len() as u32, view))
} else { None };
if self.last_view.board.hints_remaining > 0 {
public_info.update_noone_else_needs_hint();
}
// if anything is totally useless, discard it
if public_useless_indices.len() > 1 {
return TurnChoice::Discard(public_useless_indices[discard_info.unwrap().value as usize]);
let info = public_info.get_hat_sum(public_useless_indices.len() as u32, view);
return TurnChoice::Discard(public_useless_indices[info.value as usize]);
} else if useless_indices.len() > 0 {
// TODO: have opponents infer that i knew a card was useless
// TODO: after that, potentially prefer useless indices that arent public
@ -945,7 +944,9 @@ impl InformationPlayerStrategy {
&self.last_view.board, &self.public_info.get_player_info(turn_player)
);
// TODO: reorder these blocks in the next commit!
if self.last_view.board.hints_remaining > 0 {
self.public_info.update_noone_else_needs_hint();
}
if known_useless_indices.len() > 1 {
// unwrap is safe because *if* a discard happened, and there were known
// dead cards, it must be a dead card
@ -953,9 +954,6 @@ impl InformationPlayerStrategy {
let info = ModulusInformation::new(known_useless_indices.len() as u32, value as u32);
self.public_info.update_from_hat_sum(info, &self.last_view);
}
if self.last_view.board.hints_remaining > 0 {
self.public_info.update_noone_else_needs_hint();
}
}
TurnChoice::Play(_index) => {
// TODO: Maybe we can transfer information through plays as well?