Memory game vs tic-tac-toe: compare the source templates

Pixel Pairs and Three in a Row template features
Feature	Pixel Pairs	Three in a Row
Rendering	HTML buttons	HTML buttons
Update timing	Input-driven, with an 800 ms mismatch delay	One update after each valid move
Players	One player	Two players on one device
State to understand	Sixteen tiles, the first selection, a lock flag, moves, and matched count	Nine cells, current player, move count, and eight winning lines
Round ends	Match all eight pairs to complete the board	Three matching marks in a line wins; a full board without a line is a draw
First change	Replace the eight symbols, or change the mismatch delay while preserving the input lock.	Add a round counter or highlight the winning line before considering a computer opponent.

Pixel Pairs and Three in a Row template features

Feature

Pixel Pairs

Three in a Row

Rendering

HTML buttons

Update timing

Input-driven, with an 800 ms mismatch delay

One update after each valid move

Players

One player

Two players on one device

State to understand

Sixteen tiles, the first selection, a lock flag, moves, and matched count

Nine cells, current player, move count, and eight winning lines

Round ends

Match all eight pairs to complete the board

Three matching marks in a line wins; a full board without a line is a draw

First change

Replace the eight symbols, or change the mismatch delay while preserving the input lock.

Add a round counter or highlight the winning line before considering a computer opponent.

Choose Pixel Pairs for asynchronous state

A mismatch remains visible for 800 milliseconds. During that time, the board must reject a third selection. Restart must cancel the pending delay so a callback from an old round cannot change the new board. This is a small, practical example of coordinating input with a timer.

Choose Three in a Row for turn logic

The tic-tac-toe board keeps nine cell values and a current player. Each valid move is checked against eight winning combinations, followed by the draw check. There is no hidden board or matching timer. Two people play locally; the starter does not include an AI opponent or network service.

How to extend either board

For Pixel Pairs, replace the symbols while keeping exactly two copies of each. For Three in a Row, highlight a winning line or add a round score. Both projects benefit from testing keyboard focus after a board redraw. If you add a reset button, make its behavior consistent during an active turn as well as after a win.

What both downloads include

Each ZIP contains index.html, a README, and the MIT license. Both run without package dependencies and store no online player score. Read the license before redistributing the source.