gaps game - SERP Analysis

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https://www.solitairenetwork.com/solitaire/gaps-solitaire-game.html

https://en.wikipedia.org/wiki/Gaps

https://blacksreds.com/patience-mat

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https://entertainment.howstuffworks.com/how-to-play-gaps.htm

https://play.google.com/store/apps/details?id=com.avabyte.gapssolitaire&hl=en_US

https://www.sheppardsoftware.com/brain/solitaire/gaps/

https://www.crazygames.com/game/fill-the-gap

https://www.solitaire.org/gaps/