Iswishi ezenzakalelayo yamandla amabili isetshenziselwa ukushintsha phakathi kwemithombo emibili yamandla. Ihlukaniswe ngokunikezwa kwamandla okuvamile kanye nokunikezwa kwamandla okulinda. Uma ukunikezwa kwamandla okuvamile kucinyiwe, kusetshenziswa ukunikezwa kwamandla okulinda. Uma ukunikezwa kwamandla okuvamile kubizwa, ukunikezwa kwamandla okuvamile kuyabuyiselwa), uma ungadingi ukushintsha okuzenzakalelayo ezimweni ezikhethekile, ungayisetha futhi ekushintsheni ngesandla (lolu hlobo lokusetshenziswa ngesandla / okuzenzakalelayo okuphindwe kabili, ukulungiswa okungahleliwe).