Assume that, in the figure below, we start off knowing that the top left square is mined and so the two squares marked 2 on the left only require one more mine. Next observe that the left-most 2 implies that one of the covered squares beneath it is mined, but we don't yet know which one. Since at least one of these squares is mined and they are both neighbors of the second 2 then we know that that 2 is also satisfied by one of these two squares (we still don't know which one). This means that the square beneath the 4 is clear because it is also a neighbor of the second 2 and not one of the two squares we identified previously. This one blank square now leaves the 4 with only four neighbors - all of which must be mines. Not only does it tell us which mines surround the 4, it now tells us which of the squares beside the 2 is mined!
Eman dezagun azpiko irudian badakigula goiko ezkerreko laukiak mina bat duela. Beraz, 2 zenbakiaz markatuta ezkerretara dituen bi laukiek mina bakarra behar dute. Jarraian, kontuan har ezazu ezker-ezkerrean dagoen 2 horrek adierazten duela azpian estalita dauden laukietako batek mina bat duela, nahiz eta oraindik ez dakigun zeinek. Lauki horietako batek mina bat duenez, eta guztiak 2 horren ondoan daudenez, badakigu 2 hori bi lauki horietako batek asetzen duela (oraindik ez dakigu zein laukik). Horrek esan nahi du 4aren azpian dagoen laukia hutsik dagoela, bigarren 2 horren alboan baitago eta ez da aurrez identifikatu dugun bi laukietako bat. Lauki huts horrek, beraz, lau lauki uzten ditu 4 horren inguruan –guztiek minak izan behar dute. Ez digu soilik esaten zein diren 4a inguratzen duten minak, baizik minak 2aren inguruko zein laukitan dauden ere esaten digu.