How to play
Each day is a new cave: ten chambers, each asking for any answer from a list, and each harder than the last. Type an answer before your lantern goes out: 25 seconds a chamber, and every miss burns 5.
A right answer finds a gem. The fewer of today's explorers who gave the same answer, the rarer the gem: Quartz, Amethyst, Emerald, Ruby, then Diamond. The deeper the chamber, the more each gem is worth: its points times the chamber's number.
After each find, bank your haul and climb out, or dive into the next chamber without seeing its question. If the lantern goes out, the cave comes down and your haul counts against you.
One puzzle a day, the same for everyone, new at midnight Eastern. Past days stay in the archive for practice.