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Instead of using a [[Quiescence Search|quiescence search]], some (early) chess programs aimed to determine the material balance of a position by a static analysis of '''all''' possible capture-move sequences. These routines are often referred to as [[SOMA#SOMAALGO|SOMA]] ('''S'''wapping '''O'''ff '''M'''aterial '''A'''nalyzer) <ref>[[Hiroyuki Iida]], [[Makoto Sakuta]], [[Jeff Rollason]] ('''2002'''). ''Computer Shogi''. Artificial Intelligence, Vol. 134, [https://en.wikipedia.org/wiki/Elsevier Elsevier], [http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.130.2727 CiteSeerX]</ref> based on the [[SOMA#SwapoffSwapOff|swap-off algorithm]] used in the one-ply analyzing "paper machine" [[SOMA]] by [https://en.wikipedia.org/wiki/Evolutionary_biologist evolutionary biologist] [[John Maynard Smith]], the '''S'''mith '''O'''ne-'''M'''ove '''A'''nalyzer designed in the early 60s <ref>[[John Maynard Smith]], [[Donald Michie]] ('''1961'''). ''Machines that play games''. [https://en.wikipedia.org/wiki/New_Scientist New Scientist], 12, 367-9. [http://books.google.com/books?id=lo7r0zX_T0sC&lpg=PA369&dq=Machines%20that%20play%20games.%201961%2C%20New%20Scientist%2C%2012&pg=PA367#v=onepage&q&f=false google books]</ref> .