CS50 2D - Lecture 3 - Match 3

CS50 2D - Lecture 3 - Match 3

by CS50

Applied Sciences & Engineering Computing & Cybersecurity UMComputer programmingUMKGames development and programming
🎙 CS50 👥 2.5M 📅 April 24, 2026 ⏱ 114 min 👁 6K 📄 tutorial 🧭 2026-08-13
Available in: English (current) Français

Keywords

Match-3tweeningtimersquadstile grid

Summary

This is the third lecture in Harvard’s CS50 2D course, focusing on building a Match-3 game (like Bejeweled or Candy Crush) using the LÖVE game engine and Lua. The instructor, David Malan, begins by demonstrating a finished version of the game, highlighting features like smooth tile transitions, timers, and color palettes. He then reviews the concept of quads from the previous lecture, showing how to slice a texture atlas into individual tiles and store them in a data structure. The lecture then dives into timers, explaining how to manage multiple timers for various game events, and introduces tweening for smooth interpolation of values over time. The core mechanics of Match-3 are covered: detecting matches, swapping tiles, filling gaps, and scoring. The lecture also touches on sprite art and color palettes for visual polish. The session is practical, with live code examples and explanations of the underlying logic.

147 words

Critical Evaluation

Value of the Information & Strength of the Argument

The lecture provides a solid, practical introduction to game development concepts. The value lies in its clear, step-by-step approach to building a functional game, with emphasis on reusable techniques like tweening and timer management. The argumentation is strong: the instructor justifies each design choice and demonstrates the code live, making the reasoning transparent. The use of a real game example helps contextualize abstract concepts.

Scientific Rigor, Source Quality, Title Accuracy

The lecture is scientifically rigorous in its pedagogical approach, though it is not a research presentation. Sources are primarily the course’s own materials and references, which are reliable. The title accurately reflects the content. The description provides links to the course and related resources, but no external scientific sources are cited. The lecture is well-structured and technically accurate.

137 words

Title / Content Match

The title accurately reflects the content: a lecture on building a Match-3 game.

Quality & Reliability

8/10

Lecture from Harvard's CS50, known for rigorous educational content. The instructor demonstrates code live and explains concepts clearly. Sources are primarily the course's own materials and references.

Key Moments

Markers derived by PSI from the transcript: the creator did not define chapters.

Cited Sources

Concurring Sources

  • CS50 2D Course — Course page for CS50 2D, which this lecture is part of.

External References

Contribution & Novelties

The lecture offers a comprehensive, hands-on approach to building a Match-3 game, emphasizing reusable techniques like tweening and timer management. It builds on previous lectures, providing a clear progression. The ‘Pour aller plus loin’ section suggests exploring LÖVE documentation, Lua programming, and game design patterns.

Pour aller plus loin :

92 words

Radar Profile

The radar profile shows high scores in information quantity and quality, with moderate technical depth and reliability. This indicates a well-structured educational video that provides substantial content without being overly complex.

Reliability 8/10

💬 No comments were provided for analysis.