Line or Colour is a strategy game for 2 players by Néstor Romeral Andrés.
Line or Colour involves two winning conditions (line and colour) that can tie players' brains in knots. Warning: the rules are simple, but this is a real brainburner!
The rules include a variant for customizing your own boards (by using the coloured counters) and also some challenging puzzles.
49 rounded counters in 7 colours (7 each), 25 white rings, 25 black rings,
board (pad), carrying case. The rings are made of 8mm thick laser-cut acrylic.
You can also try the Java version here!