kriegspiel

Python game engine for hidden-information Kriegspiel referee rules.

You can try the rules in a live game at kriegspiel.org.

Current scope:

• Berkeley Kriegspiel
• Berkeley + Any
• Cincinnati
• CrazyKrieg
• English
• RAND
• Wild 16

The package models the referee, not a UI. You interact with it by asking questions as KriegspielMove objects and reading KriegspielAnswer results.

Install

pip install kriegspiel

Quick Start

import chess

from kriegspiel import KriegspielGame, KriegspielMove, QuestionAnnouncement

game = KriegspielGame()

question = KriegspielMove(
    QuestionAnnouncement.COMMON,
    chess.Move.from_uci("e2e4"),
)
answer = game.ask_for(question)

print(answer.main_announcement)
print(answer.special_announcement)

game.save_game("game.json")
loaded = KriegspielGame.load_game("game.json")

KriegspielGame() defaults to Berkeley + Any for backward compatibility. You can still use BerkeleyGame explicitly as a compatibility wrapper, or pick a ruleset with ruleset=....

Cincinnati, CrazyKrieg, English, RAND, and Wild 16 also have their own convenience entrypoints:

from kriegspiel import CincinnatiGame, CrazyKriegGame, EnglishGame, RandGame, Wild16Game

cincinnati = CincinnatiGame()
print(cincinnati.current_turn_has_pawn_capture)

crazykrieg = CrazyKriegGame()
print(crazykrieg.public_reserve_summary)

english = EnglishGame()
print(english.any_rule)

rand = RandGame()
print(rand.current_turn_pawn_try_squares)

wild16 = Wild16Game()
print(wild16.current_turn_pawn_tries)

Main Concepts

• KriegspielGame: the neutral public entrypoint for the shared hidden-board engine
• BerkeleyGame: backward-compatible Berkeley-named wrapper over KriegspielGame
• CincinnatiGame: Cincinnati convenience entrypoint with public NONSENSE and binary pawn-capture announcements
• CrazyKriegGame: Crazyhouse Kriegspiel entrypoint with public reserves, hidden drops, and exact reserve-identity capture announcements
• EnglishGame: English convenience entrypoint with public illegal attempts and one-try ASK_ANY handling
• RandGame: RAND convenience entrypoint with public rebuffs, pawn-try source-square announcements, typed captures, and promotion notices
• Wild16Game: Wild 16 convenience entrypoint over the shared hidden-board engine
• KriegspielMove: a player question, either a normal move or ASK_ANY
• KriegspielAnswer: the referee response, including move outcome, captures, special announcements, and variant-specific public metadata

Links

• PyPI: kriegspiel
• Live site: kriegspiel.org
• Issues: github.com/Kriegspiel/ks-game/issues