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A search in an all-jet final state for new massive resonances decaying to [Formula omitted][Formula omitted],[Formula omitted][Formula omitted], or [Formula omitted][Formula omitted] boson pairs using a novel analysis method is presented. The analysis is performed on data corresponding to an integrated luminosity of 77.3 [Formula omitted] recorded with the CMS experiment at the LHC at a centre-of-mass energy of 13 [Formula omitted]. The search is focussed on potential narrow-width resonances with masses above 1.2 [Formula omitted], where the decay products of each [Formula omitted] or [Formula omitted] boson are expected to be collimated into a single, large-radius jet. The signal is extracted using a three-dimensional maximum likelihood fit of the two jet masses and the dijet invariant mass, yielding an improvement in sensitivity of up to 30% relative to previous search methods. No excess is observed …