It costs black one point. The cut is lethal: f4 pass g3... and there is no good reply left for black
so if black is first he plays f4, if white plays first she plays f4 and black has to cover the cut which cost him 1 point
Fwiffo: Yes, you are right and that is why the computer didn't give me the corner already. Thank you for the enlightment. After that the game is over I think.
(peida) Kui Sa ootad oma käiku, klõpsa pealehel "Värskenda" järel "muuda", siis pane lehe värskendus 30 sekundile, et Sinu käigukord ilmuks kiiremini nähtavale. (Servant) (näita kõiki vihjeid)