ɪɾ ɐplˈaɪd tʊ ˈɔːl ɪts plˈeɪɔfs fɹʌm nˈaɪntiːnhˈʌndɹɪd ˈeɪtiːn tə nˈaɪntiːnhˈʌndɹɪd twˈɛnti sˈɪks, ænd ðɪ ˈɜːli ɹˈaʊndz ʌntˈɪl nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi sˈɛvən, wˌɛn ɪt kəmplˈiːɾᵻd ðə swˈɪtʃ tə bˈɛstʌvˈɛn sˈɪɹiz; ɹˈɛndɛzvˈuːz ˈeɪɾi sˈɛvən wˌɪtʃ pˈɪɾᵻd ɐ tˈiːm ʌv ˌɛnˌeɪtʃˈɛl ˈɔːlstˈɑːɹz ɐɡˈɛnst ðə sˈoʊviət jˈuːniən wʌzðɪ ˈoʊnli tˈuːlˈɛɡɪd tˈaɪ təbi hˈɛld ɪnðə lˈiːɡz hˈɪstɚɹi ˈæftɚ nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi sˈɛvən.
It applied to all its playoffs from 1918 to 1926, and the early rounds until 1937, when it completed the switch to best-of-n series; Rendez-vous '87 (which pitted a team of NHL All-Stars against the Soviet Union) was the only two-legged tie to be held in the league's history after 1937.