Some other games in the immediate family: Y https://boardgamegeek.com/boardgame/5242/game-y https://boardgamegeek.com/boardgame/5242/game-y (from 1953) ConHex

Some other games in the immediate family: Y https://boardgamegeek.com/boardgame/5242/game-y https://boardgamegeek.com/boardgame/5242/game-y (from 1953) ConHex https://boardgamegeek.com/boardgame/10989/conhex https://boardgamegeek.com/boardgame/10989/conhex Away Across https://boardgamegeek.com/boardgame/30988/away-across https://boardgamegeek.com/boardgame/30988/away-across (Sid Sackson game from Calculate! - a set of math games) Lightning https://boardgamegeek.com/boardgame/35528/lightning https://boardgamegeek.com/boardgame/35528/lightning (from 1892 - possibly the first connection game - https://patents.google.com/patent/US471666A/en?oq=US471666 https://patents.google.com/patent/US471666A/en?oq=US471666) Thoughtwave https://boardgamegeek.com/boardgame/2395/thoughtwave https://boardgamegeek.com/boardgame/2395/thoughtwave (1974) a pipe's style. Tak https://boardgamegeek.com/boardgame/197405/tak https://boardgamegeek.com/boardgame/197405/tak (from The Wise Man's Fear) Twixt https://boardgamegeek.com/boardgame/949/twixt https://boardgamegeek.com/boardgame/949/twixt (1962, when 3M made games) (For more - https://boardgamegeek.com/boardgamefamily/7345/mechanism-connection https://boardgamegeek.com/boardgamefamily/7345/mechanism-con... and https://en.wikipedia.org/wiki/Connection_game https://en.wikipedia.org/wiki/Connection_game )