Both players are Black, and only black stones are played. Every pair of stones has to be connected by an orthogonal path of empty points, of length at least 1. Just being adjacent doesn't count as being connected. Otherwise the board would fill up with black stones.
Last move wins.
Game page:
https://boardgamearena.com/gamepanel?game=blacknarrows
Rule sheet:
https://www.marksteeregames.com/Black_Narrows_rules.pdf
Last move wins.
Game page:
https://boardgamearena.com/gamepanel?game=blacknarrows
Rule sheet:
https://www.marksteeregames.com/Black_Narrows_rules.pdf