Update README.md

README.md

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 ## 🎯 Project Overview
 A very rudamentry Chess program (and eventually, AI) based on Graeme Devine's [skeleton code](https://github.com/Spebby/CMPM123-Chess/commits/95c448471543cbf7a933316e770efa8766cd0943/), given a graphical interface with [Dear ImGui](https://github.com/ocornut/imgui/tree/docking). This is the final project for the CMPM-123's Fall '24 Quarter at the University of California, Santa Cruz.
 
+You can view previous phases of this project by checking out the associated branches.
+
+[Part 1](https://github.com/Spebby/CMPM123-Chess/tree/Part-1) -- [Part 2](https://github.com/Spebby/CMPM123-Chess/tree/Part-2) -- [Part 3](https://github.com/Spebby/CMPM123-Chess/tree/Part-3)
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 ### 🎓 Educational Purpose
 This project serves as a teaching tool for computer science students to understand:
 - Game state representation
@@ -156,4 +160,4 @@ This project is licensed under the MIT License.
 - Original game engine framework by [ocornut](https://github.com/ocornut/imgui)
 
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-*This README is part of an educational project and is intended to serve as an example of good documentation practices.*
+*This README is part of an educational project and is intended to serve as an example of good documentation practices.*