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15 round format
From Countdown
There have been two major Countdown game formats known as the 15 round format:
- The "old" or "original" 15 round format (LLLLNLLLLNLLLNC), used from Series 46 (September 2001) to Series 68 (March 2013)
- The "new" 15 round format (LLNLLNLLNLLLLNC), used since Series 68 (March 2013)
Most Countdown Masters games also contained 15 rounds in the pattern LNCLNCLNCLNCLNC, spread over five days.