@[Block Blast](https://block-blast.io) Yes, technically, you can submit a 999-second run as your personal best (PB) if there are no specific rules stating that it must be a fast time. However, in most Minesweeper communities, PBs typically refer to the fastest completion times. If you're submitting a time just for fun or as a challenge for the longest possible run, it might not be taken seriously in competitive circles.

Was this a one-time occurrence, or have you been able to replicate it with other [Block Blast](https://block-blast.io) bosses? If it was a fluke, it might not be a reliable tactic. However, if you can consistently trigger this behavior, it could be a valuable strategy.