Bob's 27

Hit doubles to add to your score, miss and lose points.

How to play: Start with 27 points. Each round, the target is a specific double — the thin outer ring around a number, worth twice its value — starting with double 1 in round 1, double 2 in round 2, and so on. Hit it and your score goes up by double that number's value. Miss completely and your score goes down by the same amount instead. Drop to zero or below and you are eliminated.

Setting	Options	Notes
Mode	Normal / Allow Negative Score	Whether a player is eliminated once their score would drop to or below zero, or can continue playing at a negative score.
Order	1-20-Bull / 1-20	The sequence of target doubles — through the bullseye at the end, or stopping at double 20.

Bob's 27 is strictly single-player

Unlike every other Practice mode, Bob's 27 can't be played with anyone else — not a local guest, not another player online. The Add Player button still appears in the lobby like it does for every other mode, but opening it shows every Add / Invite option grayed out and unusable. Add Bot is disabled outright too, same as the rest of the Practice modes (Bob's 27 has no Bot opponent either).

Bob's 27 lobby showing a 1/1 player cap in the Players panel, Add Player enabled but Add Bot grayed out and disabled — The lobby — the Players panel caps out at "1/1", Add Player looks normal, but Add Bot is disabled.

Add Player modal for Bob's 27 with the Add button and every Invite button grayed out and disabled — Opening Add Player shows every Add / Invite option disabled — there's no way to actually add anyone.

Each round targets the next double in sequence, shown at the top of the screen. Hitting it adds to your score; missing it subtracts:

Bob's 27 match start, single player at 27 points with no opponent card — Match start — solo only, so there's just the one card and no opponent.

Bob's 27 after two rounds with no hits, score dropped from 27 to 21 — Two rounds with no hits — the score has dropped from 27 down to 21.

Bob's 27 after two rounds including at least one hit, score risen from 27 to 29 — Two rounds including at least one hit — the score has risen from 27 to 29.

Bob's 27 post-match Game Stats panel showing Score, Hit %, Max Points, Highest Target, and a per-double Targets table — Post-match stats: final score, Hit %, Max Points reached, Highest Target, and a per-double breakdown.

Trivia: Who is "Bob"?

This isn't a generic name — Bob's 27 is named after Bob Anderson, a former World Masters champion and one of the longest-serving professionals in darts. He devised the routine as a way to drill doubles, the exact skill an X01 checkout depends on, by forcing a player through every double on the board in sequence instead of practicing them at random.