San Ren Sei: Cosmic Masterclass
Master the moyo. Punish invasions. Win before the endgame.
San Ren Sei—also known as the Three Star Opener—is a timeless fuseki that builds cosmic potential from move one. Once a favorite even among professionals, this opening may be out of style in modern AI theory, but for kyu and low dan players, it remains one of the most effective ways to control the board and dominate with influence.
Master the moyo. Punish invasions. Win before the endgame.
San Ren Sei—also known as the Three Star Opener—is a timeless fuseki that builds cosmic potential from move one. Once a favorite even among professionals, this opening may be out of style in modern AI theory, but for kyu and low dan players, it remains one of the most effective ways to control the board and dominate with influence.
Master the moyo. Punish invasions. Win before the endgame.
San Ren Sei—also known as the Three Star Opener—is a timeless fuseki that builds cosmic potential from move one. Once a favorite even among professionals, this opening may be out of style in modern AI theory, but for kyu and low dan players, it remains one of the most effective ways to control the board and dominate with influence.
What You’ll Learn
The Core Principles Behind San Ren Sei
Understand why this opening works, what it aims to achieve, and how to steer the game in your favor from the first few moves.How to Punish Invasions Without Killing
When your opponent invades your moyo, you won’t need to panic or chase. You’ll learn how to calmly gain thickness, build frameworks elsewhere, and use their overplays against them.Attacking for Profit, Not Blood
You won’t chase every weak group to the death—instead, you’ll use pressure to build territory, grow influence, and break their shape.When to Be Flexible—and When to Strike
Cosmic Style isn’t about being stubborn. You'll learn when to sacrifice, when to switch sides, and how to turn any fight into an advantage.Smart Invasion Handling
You'll learn how to choose the right joseki based on the overall board situation—not just follow fixed patterns. You’ll also master how to deal with invasions in a way that turns them into opportunities, gaining thickness, influence, and profit instead of panic.
This course isn’t about memorizing sequences—it’s about understanding the why behind every move.
Once you understand the logic, you’ll not only play San Ren Sei better—you’ll play Go better.
If you’ve ever wanted to control the board, build something massive, and force your opponents to collapse under pressure…
San Ren Sei: Cosmic Style Masterclass is how you start.