Tetris
A cikin 1985, Alexey Pazhitnov ya ƙirƙira Tetris a matsayin wani ɓangare na aikin kimiyya na Jami’ar Kimiyya a Moscow. Sunan Tetris an samo shi ne daga kalmar Helenanci ‘Tetra’ wacce take tsaye zuwa huɗu - kamar yadda duk abubuwan da ke cikin wasan an yi su ne da tubala huɗu.
Tetrominoes ko tetrads guda bakwai da bazuwar aka fassara su - siffofi waɗanda aka haɗa da bulo huɗu kowannensu - sun faɗi a filin wasan. Abun wasan shine don sarrafa waɗannan tetrominoes tare da manufar ƙirƙirar layin kwance ba tare da rata ba. Lokacin da aka ƙirƙiri irin wannan layin, sai ya ɓace, sai tubalan da ke sama (idan akwai) su faɗi. Yayin da wasan ke ci gaba, tetrominoes suna saurin faduwa, wasan yana karewa yayin da tarin Tetrominoes ya kai saman filin wasan.
Tetrominoes bakwai da aka fassara a cikin Tetris ana kiran su I, T, O, L, J, S, da Z. Duk suna da ikon yin aure sau biyu. Ni, L, da J na iya share sau uku. I tetromino ne kawai ke da damar share layuka hudu a lokaci guda, kuma ana kiran wannan bayyanin a matsayin ‘tetris.’ (Wannan na iya bambanta gwargwadon juyawa da dokokin biyan diyya na kowane takamaiman aiwatarwar Tetris; Misali, a cikin dokokin ‘Tetris Worlds’ da aka yi amfani da su a yawancin aiwatarwar kwanan nan, wasu ƙananan yanayi suna ba da damar T, S da Z su ‘zame’ cikin matsattsun wurare, share sau uku.)
An yi imanin cewa ɗayan mafi kyawun wasannin sayarwa ne a kowane lokaci, galibi saboda wadatar shi akan adadi mai yawa na dandamali. An nuna Tetris a cikin arcades, na’urorin caca ta hannu kamar Nintendo’s Game Boy, wayoyin hannu, PDAs, kwamfutoci na sirri da kuma yanar gizo.
Waƙar don asalin wasan game Boy na Tetris mai taken ‘Music A’ ya zama sananne sosai. Gaskiyar ita ce waƙar jama’ar Rasha da ake kira ‘Korobeyniki’. Har wa yau ana kiyasta cewa biyu daga cikin manyanmu uku da ke zaune a Amurka sun bayyana sautin a matsayin ‘The Tetris tune’.
Tetris alamar kasuwanci ce mai rijista ta Tetris Company LLC, amma wasan kansa bashi da haƙƙin mallaka a Amurka (wasannin ba za a iya haƙƙin mallaka ba, kawai haƙƙin mallaka ne, kuma duk wani Patent da yake da’awar zuwa Tetris zai ƙare ta yau) - wanda shine dalilin da ya sa yawancin Tetris clones ke bin doka wanzu