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H-Group Hanabi Convention Framework

website·Indexed 30 days ago

https://hanabi.github.io/

Documentation for the H-Group convention framework for the cooperative card game Hanabi. It provides a comprehensive guide to strategies, terminology, and specific conventions for various game variants, including Hard, Easy, Totally Blind, Sudoku, and multi-color variants (Pink, Omni, Rainbow, Orange). The site includes a learning path, a glossary of core principles like the Minimum Clue Value Principle, and detailed technical play patterns such as the Orange Finesse and the Null Kick.

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What's inside H-Group Hanabi

  1. Overview of Hanabi H-Group fundamental strategies

    The H-Group beginner's guide teaches the following core Hanabi strategies:

    1. The Chop: Identifying the oldest unclued card.
    2. Card Notes: Manually recording information after every clue.
    3. Clue Types: Distinguishing between Play Clues (promising a card can be played) and Save Clues (preventing a card from being discarded).
    4. Single Focus: Ensuring only one card is the focus of every clue.
    5. Good Touch Principle: Cluing only cards that will actually be played.
    6. Save Principle: Saving all important cards.
    7. Minimum Clue Value Principle: Ensuring at least one new card is identified with every clue.
    8. Prompts & Finesses: Using a single clue to get two or more cards played.

  2. Understanding the nature of H-Group strategy conventions

    The strategy reference provides 'default' or 'common' cases rather than rigid rules. Strategies should be applied flexibly using judgment and experience. Updates to conventions are announced in the #convention-announcements channel on the H-Group Discord server.

  3. Understand the concept of a Discharge in Hanabi

    A 'Discharge' is a blind-play strategy where a player plays a card from their 'Third Finesse Position'. For example, if a player's hand is completely unclued, their Third Finesse Position is slot 3. Like a Bluff, a Discharge can only be performed by the very next player in turn order.

  4. Understand Dark Pink suit convention inheritance

    In Hanabi variants featuring a dark pink suit (touched by all ranks and one of each), the dark pink suit inherits all conventions associated with both black cards and pink cards, subject to specific exceptions regarding tempo clues and 'Fake 5' moves.

  5. Analyze Hanabi clues for Play vs Save logic

    In Hanabi, when a player (Alice) provides a clue about a specific card (e.g., number 2) in a specific slot (e.g., slot 4) for another player (Bob), Bob must determine if the clue is a 'Play Clue' (indicating the card can be played immediately) or a 'Save Clue' (indicating the card should be kept for later). Bob then records a 'card note' to track this information for future turns.

  6. Use the Empathy feature to view other players' perspectives

    The 'empathy' feature allows a player to see how cards appear to another player, simulating the act of asking 'what do you know about your cards?'. This is activated by pressing the space bar or left-clicking on another player's hand.

  7. Understand Ejection mechanics in Hanabi

    An Ejection is a blind-play strategy where a player plays a card from their Second Finesse Position. For a player with a completely unclued hand, the Second Finesse Position is slot 2. Like a Bluff, an Ejection can only be performed by the player immediately following the clue-giver.

  8. Manage card notes in Hanabi Live

    Card notes are used to track information about cards in hand. Certain shorthand notes trigger visual changes to the card's appearance on the website:

    • Card Identity: Writing a card name (e.g., "red 2" or "r2") snaps the card image to that specific card.
    • Finessed (f): Indicates a card will be blind-played in the future. This adds a special border around the card. Shortcut: shift + right-click.
    • Chop Moved (cm): Indicates a card is Chop Moved (a Level 4 convention). This adds a special border. Shortcut: alt + right-click.
    • Stacking: Multiple notes can be combined using brackets, such as [f] [red 2].

  9. Implement the Purge Bluff strategy in 3-player Hanabi

    The Purge Bluff is an advanced 3-player Hanabi convention where a clue is given that is technically legal even if no one holds the specific card being signaled. This is used to manipulate other players' beliefs about the board state to induce specific blind-plays.

    In a typical scenario:

    1. A player (Alice) clues a color to another (Cathy), signaling a specific card (e.g., Green 4) is playable.
    2. A third player (Bob) interprets this clue as a 'Prompt' or 'Finesse' on other cards he holds (e.g., Green 2), leading him to play those cards.
    3. The recipient (Cathy) realizes that because of the current state, no one actually holds the signaled card (e.g., Green 3).
    4. Cathy anticipates that Bob believes he is participating in a 'Layered Finesse,' leading Bob to blind-play subsequent cards (e.g., Blue 2, then Purple 1) based on the false assumption that the Green 3 is still in play.

  10. Understand the Hanabi convention level system

    Hanabi strategies and conventions are organized into 'levels' based on player experience to prevent overwhelming new players and to ensure game predictability. When starting a game, players should agree on a specific level to play with. All participants must strictly adhere to the conventions of that level; advanced players should avoid using higher-level moves when playing at a lower level to ensure fundamentals are mastered first.

  11. Understand the Pestilent Double Bluff convention

    The Pestilent Double Bluff is a level 15 Hanabi convention. It is used when a player (Alice) provides a clue that appears to be a 'Finesse' or a 'Bluff', which would normally lead another player (Donald) to misidentify a card in their hand. To 'heal' this situation and signal that the initial clue was a double bluff, a third player (Cathy) blind-plays their Finesse Position card. This sequence of actions informs the target player (Donald) that their card is not the color they initially suspected based on the first blind-play.

  12. Understand Bubblegum Moves

    A 'Bubblegum' move is a deliberate violation of the Pink Promise where a player lies about the rank of a pink card that is not yet playable. This lie is used to communicate the slot number of the connecting card to teammates. The true rank of the pink card is later revealed and 'fixed' when players unexpectedly play cards from the matching slot number.