15 gas opening is the most common build for TvP in recent IEM – World Championship and MLG Winter Championship. The build is not exactly new as it has been used in Wings of Liberty for TvT, albeit it wasn’t as popular as other builds.
The build has been mentioned in Team Liquid and Reddit, but I feel that the “descriptions” do not clearly identify the true value of the build. This post is about how the build could shape up to adapt to various options of Protoss.