Overview
Collect Glass out of the River and Lake to add to your Glasswork to accumulate sets of the same colour.
Turn
On your turn, either Place in the River OR Draw from the Lake.
If you Place in River, put a glass from your satchel in the river segment that matches its shape, then collect all the glass from an adjacent segment and put those in your Glassworks. Alternatively, place two pieces of the same shape in any river segment and collect from an adjacent segment.
The segment collected from is moved to the start of the river and new glass is added to it from the supply based on the number of stone icons on the adjacent segment.
If you Draw from the Lake, take 4 glass from the lake into your satchel, then refill the lake. Your satchel can only hold 5 glass; any extra are put in your overflow area and deduct points.
Glasswork
During the Place in River action, you add the new glass to your Glasswork display.
Each column accommodates a single colour. If the glass color you gathered is present in your Glasswork, add it to the corresponding column. If the column is full, extra glass of that color must go to the overflow area.
If the glass you gathered is NOT present in your Glasswork, add it to the next available column on the lowest row. If you have multiple new colors to add, you can choose which order to place them. If you run out of columns (there are seven columns but eight colors) then the last color must go to the overflow area.
On the side of your Glasswork, there is a chart to show how common or rare a particular color of Glass is.
Game End
When a player has placed at least 17 pieces of glass in their Glasswork (not including Overflow), the end game triggers.
At this point, any player with less than three glass in their Satchel draws from the bag (NOT the Lake) until they have three glass.
Finish the current round, then take one more round.
During this time, Draw from Lake is NOT an option anymore.
After all have finished, scoring occurs.
First, score points for each row based on how many consecutive spaces are filled. Rows must be filled from the left; any row without a piece in the leftmost column does not score. Row points are listed along the bottom of the board.
Secondly, score your 2 highest columns, gaining listed points at their highest filled space. If two columns are the same height, score the leftmost one (i.e. if tied, you'll always score the lower scoring tower).
Finally, lose 3 points for each glass in overflow.
The player with the most points wins!