ɪn ɐ mˈoːɹ mˈɑːdɚn fˈɔːɹm, nˈoʊn æz ɹˈoʊmən kˈiː kˈɑːɹd blˈækwʊd ˌɑːɹkˌeɪsˌiːbˈiː, ðə fˈoːɹ ˌɛntˈiː bˈɪd ˈæsks pˈɑːɹtnɚ tə dɪsklˈoʊz ðə nˈʌmbɚɹ ʌv kˈiː kˈɑːɹdz hˈɛld wˌɛɹ ðə fˈaɪv kˈiː kˈɑːɹdz ɑːɹ ðə fˈoːɹ ˈeɪsᵻz ænd ðə kˈɪŋ ʌv tɹˈʌmps.
In a more modern form, known as Roman Key Card Blackwood (RKCB), the 4NT bid asks partner to disclose the number of key cards held where the five key cards are the four aces and the king of trumps.