The start count for board 521 between 7/23/22 and 8/6/22 calls for no change and to remain at 37 turns.
SHWCONPL starts 179
LAUSHW starts 108
GILSHW starts 74
179+108+74=361
361x2=722
722/37=19.
The start count between 7/16/22 and 7/30/22 calls for board 521 to have no change and remain at 37 turns on 8/1/22.
SHWCONPL starts 169
LAUSHW starts 103
GILSHW starts 63
169+103+63=335
335x2=670
670/37=18.