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New Variation[edit]

A new variation by Michael Gregorovich is Cave-Water-Dynamite. The cave holds back the water but not the dynamite. The dynamite explodes the cave but is extinguished by the water. The water defeats the dynamite but not the cave. Water symbol is a flat hand. Cave symbol is a cupped hand facing down. Dynamite is an extended thumb. (talk) 00:10, 22 April 2015 (UTC)

Please see bullet one at the top of this page: "This is not a forum for general discussion of the article's subject." If you can cite a source, perhaps we can consider including this. Otherwise, I'm having a problem with how a cave holds back water.   —Aladdin Sane (talk) 04:37, 14 July 2015 (UTC)
Michael, not only is Aladdin 100% correct in that this is not a forum for discussion on the article's subject, but dynamite both works under water and is not composed of anything flammable per se, thus there is nothing to "extinguish". JesseRafe (talk) 15:19, 16 July 2015 (UTC)


The strategy section only mentions methods to predict the opponents choice, but I believe observing the opponents hand and modifying your choice after they have chosen is an effective strategy. I seem to remember there is a robot that can play an unbeatable game versus a human opponent using this method. Also I think there are a few other similar methods that involve delaying your choice, going on the 4th beat etc. These should be included. Ashmoo (talk) 14:20, 16 July 2015 (UTC)

Umm, yeah, cheating is often an effective short-term strategy in anything, games, school, relationships or life. You might mention it is a way to cheat, sure.JesseRafe (talk) 15:09, 16 July 2015 (UTC)
Also, what do you mean "robot"? I ask because some people use it as a playful generic term even referring to programs and simulators, and there was one online (then made famous by being featured in the NYT) that "learned" complex patterns of a player and would, eventually, beat you everytime. As it was online, it did not, could not, proceed in that manner. If there was an actual robot with an electronic eye or camera that registered moves, and then cheated to beat the human, I don't recall an instance of it. JesseRafe (talk) 15:11, 16 July 2015 (UTC)
If cheating is a widely adopted strategy for any game, I think the WP article should mention it. And I think most people don't realise it is even possible to "cheat" at RPS, or that people would even consider it cheating to watch the opponents hand. The robot I remember was indeed a mechanical arm/hand with a camera attached. I'll see if I can dig something up. Ashmoo (talk) 08:48, 21 July 2015 (UTC)
Superfast rock-paper-scissors robot 'wins' every time, from 2013. --McGeddon (talk) 09:02, 21 July 2015 (UTC)

External links modified[edit]

Hello fellow Wikipedians,

I have just added archive links to one external link on Rock-paper-scissors. Please take a moment to review my edit. If necessary, add {{cbignore}} after the link to keep me from modifying it. Alternatively, you can add {{nobots|deny=InternetArchiveBot}} to keep me off the page altogether. I made the following changes:

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Question? Archived sources still need to be checked

Cheers. —cyberbot IITalk to my owner:Online 14:12, 27 August 2015 (UTC)

Two authors at loggerheads?[edit]

This part of the article and the part after it reads like it is written by two people:

The first known mention of the game was in the book Wuzazu (zh) (simplified Chinese: 五杂俎; traditional Chinese: 五雜組) by the Chinese Ming-dynasty writer Xie Zhaozhi (谢肇淛; fl. ca. 1600), who wrote that the game dated back to the time of the Chinese Han dynasty (206 BC – 220 AD).[6] In the book, the game was called shoushiling (手势令; lit "hand command"). Li Rihua's (李日华) book Note of Liuyanzhai (六砚斋笔记) also mentions this game, calling it shoushiling (手势令), huozhitou (豁指头), or huoquan (豁拳).

Throughout Japanese history there are frequent references to "sansukumi-ken" (三竦み拳), meaning "ken" (拳) [fist] games with a three-way [三] (san) deadlock [竦み] (sukumi), in the sense that A beats B, B beats C, and C beats A.[7] The games originated in China before being imported to Japan and subsequently becoming popular.[7]

One person wants to explain, and the other person wants to put more and more references to China into the article. It seems to me that a synthesis and rewrite is necessary here. NotYourFathersOldsmobile (talk) 22:12, 18 September 2015 (UTC)

Proposed merge with RPS 25[edit]

Not sure if this is notable enough to merit its own article. Adam9007 (talk) 02:52, 5 March 2016 (UTC)

It’s not. — Christoph Päper 08:58, 10 August 2016 (UTC)

Names of the games[edit]

The section Additional weapons discusses a five-weapon variant in some detail, referring to it by two different names: the inventors' name, "rock-paper-scissors-Spock-lizard",[1] and the name used in an episode of The Big Bang Theory, "rock-paper-scissors-lizard-Spock".[2] The difference may seem insignificant, but that depends on the context. When players talk about the game informally, they know what beats what, and the order of the weapons in the name may not matter. But for analysis and strategy (as well as mnemonics) of any variant with more than three weapons, the order of the weapons is essential, and the name used there should reflect that.

Rock Paper Scissors Spock Lizard resolution diagram
Rock Paper Scissors Spock Lizard gestures
Resolution and gesture diagrams for rock-paper-scissors-Spock-lizard

The importance of order is visible in the illustration of the five-weapon game's structure. Starting with the traditional "Rock" and moving counterclockwise around the diagram, it follows the order of the name given by the inventors. The structure shown by the arrows is symmetrical and easy to read. But if Spock and lizard were switched, as in the name used in The Big Bang Theory, the pattern would be twisted and hard to read, and the corresponding name would be mnemonically incorrect and would likely lead to mistakes and arguments in play.

The files used in the diagram are named following the order in The Big Bang Theory. I have changed the names used in the caption (parameters footer, alt1, alt2) to match the order of the diagram and the original name, but not of course the names of the image files.


--Thnidu (talk) 01:45, 13 November 2016 (UTC)