of their opponent A Joker allows a player to change the positions of their opponent's cards John McLeod of Pagat.com speculates that these variants are Spanish in origin, as the game is recorded as being played by students in Spain, and many of its variant names are Spanish words (cambio meaning "exchange"). The game had a commercial release as Cabo in 2010 and is similar to the 1996 Mensa Select winner Rat-a-Tat Cat. Powers "Powers" is an escalated version of Cambio where every card is given some sort of additional ability. The game can only end after knocking, and all cards stay face down unless a power dictates that one should be turned up. You start the game with 6 cards, and can look at any two of them, with the rest staying hidden until you swap them or look at them with a power. On your turn, you take the top card, and put it into your deck without looking at the card with which you want to swap it, and discard. Or, you can discard the card you have drawn straight away, and instead use the power of the card instead. The abilities are as follows: The Black King is the only card which can have its power applied when in a player's set. Knocker's penalties and bonuses Some play Golf and its variations such that that a player who knocks (turns over all cards first) but doesn't end with the lowest score is penalized: Knocker adds a penalty of 10 or 20 points, or... Knocker's score for the hand is doubled with 5 points added, or... The knocker takes a score equal to the highest scoring player for that hand, or... Knocker adds twice the number of people playing. If the knocker's score is lowest, some play with a bonus: Knocker scores zero instead of a positive score, or... Knocker's score is reduced by the number of people playing. References External links Rules of Card Games: Golf American card games Year of introduction missing Draw and discard games ja:ゴルフ (トランプ) sv:Golf (patiens)