Teeb yog daim npav ua si. Txhua daim npav muaj plaub qhov ntsuas, txhua qhov yuav siv peb qhov txiaj ntsig (tag nrho 3 x 3 Γ 3 Γ 3 = 81 phaib).
Hom thiab qhov tseem ceeb ntawm cov tsis muaj raws li hauv qab no:
daim duab ::= ellipse | rhombus | "snot"
xim ::= liab | ntsuab | violet
sau ::= dawb | kab txaij | khov kho
ntau ::= 1 | 2 | 3
Lub hom phiaj ntawm kev ua si muaj kev nrhiav tshwj xeeb ua ke ntawm peb daim npav. Peb daim npav hu ua "set" yog tias, rau txhua ntawm plaub daim npav tus cwj pwm, tag nrho yog tib yam, lossis tag nrho txawv.
Hauv lwm lo lus, peb tuaj yeem hais tias peb daim npav yuav tsis ua ib qho teeb meem yog tias ob daim npav muaj ib tus nqi, thiab qhov thib peb muaj lwm qhov. Koj tuaj yeem pom tias rau ob daim npav ib txwm muaj ib feem peb (thiab tsuas yog ib qho) uas lawv yuav yog qhov teeb tsa.
Kev ua si tshwm sim: Tus neeg nthuav qhia muab 12 daim npav rau ntawm lub rooj. Thaum ib tug neeg pom ib lub teeb, lawv qw "Set!" thiab tom qab ntawd calmly siv cov ntawv teev lus uas ua rau lub teeb. Yog tias tsis muaj teeb meem hauv daim npav phaib (feem ntau yuav, nws zoo li tsis muaj), tus neeg nthuav qhia nteg tawm peb daim npav ntxiv.
Qhov siab tshaj plaws ntawm daim npav tsis muaj teeb yog 20. Lub voj voog txuas ntxiv mus txog thaum lub lawj khiav tawm. Tus uas sau ntau pawg yeej.
Cov lej suav tau koom nrog thiab nthuav tawm ua ke ntawm 20 daim npav. Txhua tus uas xav txog nws tus kheej Chuck Norris tuaj yeem hnov ββββqab daim duab no thiab sim ua si solitaire yam tsis muaj teeb tsa ntawm nws tus kheej.
Los yog tshawb xyuas seb puas tseem muaj "set" ntawm no?