as promised, i reran the face turn search and collected data along
the way. total run time was 143.7 cpu hours (just a shade under
six days) on an HP 9000 series 715, 100MHz clock. so this machine
is a bit faster than some of the others that helped out on the
original run. (there was also some overlap between different
machines.)
these figures also show why the cases starting with R1 L1 and
R1 L3 are so slow: many more sequences in stage 1 to check.
mike
statistics below:
depth in number of times solutions stage 1 stage 2 is reached found superflip R1 F1: 9f 2 23f, 22f 10f 942 21f, 20f 11f 19180 12f 255716 19f 13f 2967572 14f 32053344 15f 330809868 18f superflip R1 F2: 10f 948 22f, 21f 11f 19032 20f, 19f 12f 251312 13f 2913516 14f 31351632 15f 321390912 18f superflip R1 F3: 9f 2 21f 10f 942 11f 19180 20f, 19f 12f 255716 13f 2967572 14f 32053344 15f 330809868 18f superflip R1 U1: 9f 2 21f 10f 826 11f 17140 20f, 19f 12f 231130 13f 2702062 14f 29334386 15f 303689360 superflip R1 U2: 10f 812 22f 11f 17080 21f 12f 232452 20f, 19f 13f 2735896 18f 14f 29776092 15f 307802732 superflip R1 U3: 9f 2 23f, 22f 10f 826 11f 17140 21f, 20f 12f 231130 19f 13f 2702062 14f 29334386 15f 303689360 superflip R1 L1 F1: 7f 96 20f, 19f 8f 1824 18f 9f 21768 10f 229616 11f 2267728 12f 21151120 17f 13f 189906448 14f 1660964664 superflip R1 L1 F2: 8f 384 22f, 21f, 20f 9f 8448 19f 10f 113440 18f 11f 1268896 12f 12941696 13f 124124064 14f 1141576128 superflip R1 L1 F3: 7f 96 20f, 19f 8f 1824 18f 9f 21768 10f 229616 11f 2267728 12f 21151120 17f 13f 189906448 14f 1660964664 superflip R1 L1 F3: 7f 96 20f, 19f 8f 1824 18f 9f 21768 10f 229616 11f 2267728 12f 21151120 17f 13f 189906448 14f 1660964664 superflip R1 L1 U1: 9f 832 22f, 21f, 20f 10f 16912 19f 11f 224248 18f 12f 2597672 13f 27754280 14f 279317240 superflip R1 L1 U2: 8f 384 22f, 21f, 20f 9f 8448 19f, 18f 10f 113440 17f 11f 1268896 12f 12941696 13f 124124064 14f 1141576128 superflip R1 L1 U3: 9f 832 21f, 20f 10f 16912 19f 11f 224248 18f 12f 2597672 13f 27754280 14f 279317240 superflip R1 L3 F1: 7f 96 21f, 20f, 19f 8f 1824 18f 9f 21768 10f 229616 11f 2267728 12f 21151120 17f 13f 189906448 14f 1660964664 superflip R1 L3 F2: 8f 384 22f, 21f, 20f 9f 8448 19f 10f 113440 11f 1268896 12f 12941696 13f 124124064 18f 14f 1141576128 superflip R1 L3 U1: 9f 832 23f, 22f, 21f, 19f 10f 16912 11f 224248 12f 2597672 18f 13f 27754280 14f 279317240 17f superflip R1 L3 U2: 8f 384 21f, 20f 9f 8448 19f 10f 113440 18f 11f 1268896 12f 12941696 13f 124124064 14f 1141576128