Must a colour or number clue point to every matching card in the hand? — Hanabi FAQ | RulesPal

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Must a colour or number clue point to every matching card in the hand?

The rulebook states this directly.

Hanabi rulebook · Rulebook · 1. GIVING A PIECE OF INFORMATION
MentalGuy · Community · 2018-09-16
IcculusTheWise · Community · 2014-07-21
JGRno5 · Community · 2015-11-12

Yes. Point to all cards of that colour or value, not just the one you care about. Partial clues are not allowed.

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