The definition is a little different depending on the subject or who you are talking to. ZZ F2L, ZBLS, VHF2L, WV, MGLS, possibly othersĦ.7 HTM per slot ~26.8 HTM per four slotsįirst Two Layers, or F2L refers to the first two bottom layers of the 3x3x3 cube, or essentially all layers up until the last layer on larger cubes. John Conway, David Benson, and David Seal
