Thanksgiving Gomoku for Guests Who Already Play Go, Chess, or Connect Four

At 4:20, with the second helping cleared and the pie still in the oven, your uncle will set a black stone on the fourth line from the edge. That is where a Go player opens, and he has opened there for thirty years. On 15×15 it is a reasonable stone. By move 30 it is the reason he is losing, and he will not be able to tell you why.

Every Thanksgiving table has three or four people who already play something. They are faster to teach than a total beginner and much harder to fix, because a wrong instinct arrives with thirty years of confidence behind it. What follows is what travels from each game, what quietly loses the game, and what to set on the board before the plates are cleared.

The Go player: two instincts travel, three sink him

Start with what he will get wrong, because it is not obvious and it is expensive.

Nothing is ever captured. A black stone on H8 with white stones on G8, I8, H7 and H9 is not dead. It is a good stone: White cannot use H8, and that stone still joins any five that runs through it. A Go player will spend three moves connecting a group that cannot die, and in gomoku a move that defends is a move that does not attack. No endgame arrives to pay you back for it.

There is no count. Go ends when both players agree to stop, and then somebody counts. Gomoku ends on the fifth stone, with half the board empty. A guest who has just secured the corner has secured nothing. If he asks who is ahead at move 25, the honest answer is that nobody is, and the position cannot be scored in his sense at all.

Two eyes are not a thing. Shape, cutting points, life and death: none of it applies. This is the hardest part, because it is not a rule he can look up. It is twenty years of a board telling him what a good shape looks like.

Two things do travel, and they are worth more than the three that do not.

He already counts liberties. Point that habit at a three instead of a group. Two empty points at the ends means the three is alive and must be answered now; one end blocked means you can leave it a move. Same arithmetic, opposite direction. A Go player picks this up in about four stones.

He understands that one move can be worth two. In Go, two separate big points are both fine to take, one after the other. In gomoku the only move that wins is the one that does two jobs at once: a four that also builds a three, a block that also opens your own line. Tell him the target is not the biggest point, it is the point with two purposes, and he will start hunting for it on the next turn.

The chess player: he already knows how this works

Hand a chess player a board and he will look for forcing moves, because that is what he does for a living. Gomoku has them, and they are stronger than anything on a chessboard: a four has exactly one legal answer. One. You place the fourth stone and the opponent has a single point to fill. That is a check, and it never runs out.

Chain them and you have VCF, a run of fours where every answer is forced until the fifth stone lands. A chess player who has never seen gomoku will find this before move 15 if you give him one sentence: every four is a check, and checks are free. Our walkthrough of a VCF chain is the page to hand him after dinner.

What does not travel: material. He will say he is up four stones. There is no material, and the stones he thinks he won are just stones. What also does not travel: trading. You cannot exchange here. Every pair of moves hands the initiative to exactly one player, the one who made the threat.

The failure mode is clustering. Chess players build a tight block in the center, because in chess pieces support each other. Here six stones bunched together that do not line up in one row are six stones doing nothing. If he is losing on move 40 with a beautiful clump, that is why.

The Connect Four kid: gravity is the whole difference

Connect Four teaches two habits and both are wrong here. The first is that stones fall. A stone is held up by the one below it, so you read columns from the bottom. On this board nothing supports anything, and a stone on the top row is worth the same as one in the middle.

The second is harder to unlearn. With gravity you see vertical threats first, then horizontal, and diagonal last, because a diagonal four is the trick shot. On a free board two of the four winning axes are diagonal, and they are half the wins. A kid who only sees rows and columns will lose to a three running corner to corner and will not understand the loss.

Play the first two games on 9×9. A 9×9 game between two people who know the rules is over in about twenty stones, which is eight minutes even with real thinking, and the diagonals sit close enough to the center that he will notice them himself. The Connect Four comparison was written for exactly this handoff.

The guest who plays nothing at all

Three sentences, then let her place a stone. Five in a row wins, in any direction, diagonals included. Black starts. Stones never move and never come off. That is the whole rulebook and it takes eighteen seconds.

Do not open with an analogy. "It is like Connect Four, except" hands her a board with gravity on it, and she will spend the first game looking for the floor. The beginner walkthrough has the long version for anyone who wants it later. At the table, the three sentences beat the page.

What to set for each guest

Guest	Board	Minutes per game	Rim stones	Say this first
Go player, 20 years in	15×15	12	0	Nothing is captured.
Chess player	15×15	10	0	Every four has one answer.
Connect Four kid, 7 to 10	9×9	6	2, paid by you	Diagonals count too.
Total beginner	9×9	none	1, paid by you	Five in a row, any direction.
Two kids, same age	9×9	8	0	No undo for either of you.
Grandparent against an eight-year-old	9×9	10	2, paid by the grandparent	Take your time, there is no clock.

Two of those columns need a note. The board has no clock, so the minutes are wall-clock limits kept on a phone by whoever is not playing. And rim stones are the only handicap this board allows, because there is no pass button: you cannot spot a weaker player three stones before the game starts, so the stronger player throws stones away during it, on the outer line, one empty point apart.

Handicap, across three generations

The count that works: two rim stones on 9×9, three on 15×15, three on 19×19 and no more. Four is not a handicap, it is a resignation with extra steps.

Board size amplifies skill faster than the handicap cancels it. A grandparent giving two rim stones on 9×9 to an eight-year-old is a real game. The same two stones on 15×15 is still the grandparent's game, because a bigger board gives the stronger player room to build two threats at once. When the gap is wide, shrink the board before you add stones. The kids' rules guide has the version of that clause a seven-year-old will agree to.

One switch, before the doorbell

Set Freestyle, not Renju. Renju is the version with fouls for Black: a double three, a double four, a line of six. At a table where six people are talking, nobody will see the warning.

If your Go player insists on Renju, because he likes rules, tell him the asymmetry instead of the three foul names. Black must make exactly five. A sixth stone in that row is refused, comes back off the board, and Black plays again. White has no such limit and wins with five or more, six included. In tournament renju that same sixth stone would lose the game on the spot; this board simply declines it, which is the kinder version for a holiday.

One more thing about a page reload. The board resets to 15×15, Freestyle, versus Computer. Step away to do the dishes, come back, and check the mode again before somebody drops a stone into an AI game and loses to it.

Who sits down first

If there is time for one game before the pie, it goes to the Go player: 15×15, Freestyle, no handicap, and if it is close at move 30 let him have it. He is the one who will still be at the table at nine, and the second game is where the liberties lesson actually lands.

The chess player gets 9×9 and no handicap, because he will find the forced chain and the game will end before he gets bored. The kid gets 9×9 and two rim stones and will ask for a rematch before dessert. The board is one tap away, and everything above is settings, which take ninety seconds.