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This is a very simple game, that even small children can play.
Match the card with the same face, but different colors to throw them out of your pack. Whoever throws all their cards wins. But there is a catch - 1 card does not have a double. Unlike the rest, this card is black.
How to play:
1) At the start of every game all cards are shuffled and distributed among the players.
2) Find all the matching cards in your hand and click on them to throw them down. Your opponent will do the same.
3) Your opponent will take one of your cards and then match it with one of his (if possible).
4) After that, you should take one of his cards by clicking on it. Then go back to step 2): find the matching card (if possible) and throw them both down (by clicking on them both).
5) This will continue until one of you has no cards - he wins. The person holding the last card looses!
This game, or version of it with the same goal: to discard all matching pairs cards, until no more pairs can be made is popular in many countries, but with different name. In English speaking countries when you are left with the last card they say that you are "stuck with the old maid".
Popular names of this game are:
Old Maid / Black Peter / Donkey / Jackass / Scabby Queen - in English
Schwarzer Peter / Schwarze Dame - in German
Le Pouilleux / Vieux Garçon / Mistigri / Le Pissous / Le Puant / Pierre Noir / Le Valet Noir - in French
Asino / Asinello / Scecco / Gambadilegno - in Italian
Svarte Petter / Svarta Maja - in Swedish
Svarte Per - in Norwegian
Zwarte Piet / Sorteper - in Danish
Svarti Pétur - in Icelandic
Zwartepieten / Pijkezotjagen / Zwartepiet - in Dutch
Musta Pekka / Pekka-pelikortit - in Finnish
Papaz Kaçtı - in Turkish
ババ抜き (Babanuki) - in Japanese
潛烏龜 / 坏 庀特 - in Chinese
Czarny Piotruś - in Polish
Fekete Péter - in Hungarian
Černý Petr - in Czech
Черный Питер - in Russian
Черен Петър - in Bulgarian
Crni Petar - in Croatian
Čierny Peter - in Slovak
Črni Peter - in Slovenian
อีแก่กินน้ำ - in Thai
Piekezottn - West Flemish
μου(ν)τζούρης = mu(n)tzuris / Μαύρος Πητ - in Greek
Unggoy-Ungguyan - in Filipino
Culo sucio - in Spanish
João Bafodeonça - in Portuguese
João Bafo de Onça - in Portuguese (Brazil)
Boris - in Indonesian