Costcodle answer for December 18, 2025
Puzzle #821. I read this row from the official games list. The date is the UTC calendar day sampled at noon; your live game may show another number in your time zone.
The shelf price
The item is Tillamook Farm-style Shredded Medium Cheddar, 2 x 2.5 lb. The price stored for this puzzle is $15.99. A winning guess is any amount from $15.20 through $16.78, because the game accepts a guess within 5 percent. The yellow band, within 25 percent but not yet a win, runs from $12.00 to $19.98.
How I would have opened it
If I had started this day at $9.59, that guess would sit about 40.0 percent under $15.99. Anything beyond 25 percent away is a red tile. I would then jump toward the middle of the remaining range instead of nudging by a dime. Once a guess lands inside the yellow band I only test the center of $15.20 to $16.78.
Neighbors
- Previous: #820 Del Real Foods Salsa Red & Green Combo Pack, 2 x 24 oz on 2025-12-17
- Next: #822 Spice Islands Ground Cumin Seed, 15 oz on 2025-12-19
- This month: 2025-12
Source: games.json in KermWasTaken/costcodle, key game-821. Win math follows percentAway in scripts/main.js. Checked 2026-09-30.