With the exception of the ring isomer, the errors of the db-MBE(2) are below the threshold of chemical accuracy. We note that the accuracy of both the eb-MBE and the db-MBE could be further improved with an adequate implementation of embedding schemes, such as point charges and frozen density embedding. Next, we extended our tests to CCSD(T) calculations for (H 2 O) 6 . For the eb-MBE [Eq. ( )], we used the CCSD(T) total energies, whereas for evaluating the density-based correction [Eq. ( )], we used the densities from separate OO-CCD calculations. These densities should be reasonably close to the true CCSD(T) densities, which are not available. ) is able to reduce the error to below 6.2 kJ/mol for all four isomers. The eb-MBE (3) achieves similar accuracy as the db-MBE(2), with errors of up to 7.7 kJ/mol. The db-MBE(3) further reduces the error to well below chemical accuracy (smaller than 2.6 kJ/mol for all isomers). Thus, the high accuracy of the db-MBE(2) and db-MBE(3) is preserved when using CCSD(T) instead of DFT.