After watching Game Night playing HanabiGameNight playing Hanabi, it occurred to me that I already have a game where you don't know your own hand, Code 777. I then wondered if the Hanabi rules could be modified to work with the Code 777 tiles.
Here's a completely untested knock-up of some rules. Anyone feels like trying it out, let me know how it goes. The tile distribution may just be too different, or the number of blue discs may need adjusting.
Cooperative game inspired by Hanabi using the tiles from Code 777.
All Code 777 tiles and enough racks for each player
8 blue discs
3 red discs
Build three columns of tiles starting from 7 counting down as low as possible. Each column can only use each colour once.
Shuffle tiles and put three on each player’s rack, unseen by the rack’s owner.
Put all 8 blue discs in the container and all 3 red discs out of the container.
Each player in turn chooses one of the following options:
1. Give information to a player, either telling them which tiles are a specified number or a specified colour. You must identify all the tiles of the specified number or colour. This costs a blue disc (move a blue disc from in the container to out of it). You cannot choose this action if no blue disc is available.
2. Discard a tile, removing it from the game and drawing a new tile. This gains a blue disc (move a blue disc from out of the container to in it). You cannot choose this action if no blue disc is available.
3. Play a tile then attempt to place it on a valid column using the rules below. If no valid location is available, discard the tile and gain a red disc (move a red disc into the container). If this is the last red disc then the game ends and the players have failed.
If a number 3 tile is successfully played then gain a blue disc (move a blue disc from out of the container to in it). No blue discs are moved otherwise.
Whether successful or not, draw a new tile to replace the played one..
The following rules describe valid tile placements:
1. A 7 of any colour can start a new column but only three columns are allowed. The fourth and subsequently played 7s cannot be placed.
2. A 6 can only be played on a 7, a 5 on a 6 and so on. The colour doesn’t matter except that there must be no tiles of the same colour in the column already.
The game ends in one of the following ways:
1. The last red disc is moved into the container - players lose (score zero)
2. The last tile is placed on someone’s rack. Every player (including the one drawing the tile gets one more turn), then score
3. The players have completed three columns on which no more possible tiles can be placed. End immediately and score
Each column is scored separately as follows and then combined for the players’ total score.
Lowest number in column - Score
7 - zero
6 - 1 point
5 - 3 points
4 - 6 points
3 - 10 points
2 - 15 points
1 - 21 points
The maximum score possible is one column down to 1, one down to 2 and one down to 3, scoring 21 + 15 + 10 = 46 points