Tic-Tac-Toe Over GMRS

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Tic-Tac-Toe is the fastest game you can run over GMRS. A full game takes under two minutes, requires nothing but a pen and paper, and works on any channel with two licensed operators. It's a natural warm-up game before longer sessions and a great way to get kids comfortable with proper radio procedure - calling moves, using their callsign, and saying "over."

Why it works on radio

The game state is simple enough to track mentally or on a small notepad, and each move is a single number. There's no ambiguity, no complex notation, and no reason to transmit more than one sentence per turn. That makes it ideal for radio: short, clear transmissions with a defined hand-off each time.

Equipment needed

• A GMRS radio - any handheld, mobile, or base unit will do
• Pen and paper - draw a 3x3 grid and number it 1-9
• A second licensed GMRS operator on the same frequency

Setting up the grid

Before you start, both players draw the same grid. Number the squares 1 through 9, left to right, top to bottom:

 1 | 2 | 3
-----------
 4 | 5 | 6
-----------
 7 | 8 | 9

One player is X, the other is O. Decide who goes first - you can flip a coin off-air or let the person who proposed the game go first.

How to play

1. The active player keys up, states their callsign, calls their square number, and says "over"
2. The other player acknowledges, marks their own grid, calls their move, and says "over"
3. Continue until one player gets three in a row (horizontally, vertically, or diagonally) or all nine squares are filled
4. The winner (or either player for a draw) announces the result

Get three in a row to win. If all nine squares are filled with no winner, it's a draw. A best-of-five series takes less than 15 minutes and gives both players solid practice.

Example transmissions

Here's how a typical game looks on the air:

• "WRYW364, this is WRTX921. Want to run a game of Tic-Tac-Toe? I'll be X. Over."
• "WRTX921, this is WRYW364. Copy that, I'll take O. You go first. Over."
• "WRYW364, X takes square 5. Over."
• "Copy. O takes square 1. Over."
• "WRYW364, X takes square 9. Over."
• "Copy. O takes square 3. Over."
• "WRYW364, X takes square 7. That's three in a row - 7, 5, 3. X wins. Good game. Over."
• "Confirmed. Good game. WRYW364, WRTX921 clear."

Tips for running the game smoothly

• Best-of-five series: Games end fast - agree on a series length before you start so there's a natural endpoint
• Kids love it: Tic-Tac-Toe is a great first radio game for children on your family license. The rules are already familiar; they just need to learn to use their callsign and say "over"
• Warm-up before longer games: Run one or two rounds of Tic-Tac-Toe before starting Chess or Battleship to get both operators in the rhythm of clean, concise transmissions
• Net openers: If you run a weekly net, Tic-Tac-Toe works well as a quick activity after the roundtable - fast enough that late check-ins won't miss it

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