There are two schools of thought with regard to making changes to openings. Most people believe that you should stick to what’s working whilst a rare few like to move on and explore new avenues.
I like to think that I belong to the second group, at least in theory, and there are good reasons why. In the early days of playing an opening it’s all very new and exciting, not least because you are learning how the thing works. But after a while its secrets can get exhausted and you start to play the line on autopilot. This in turn can lead to your entire game becoming stale and tired.
There’s another reason too, especially in these days of databases and engines. If it becomes known that you play in a particular way there’s a good chance that your opponents will prepare for you, and with engine power being what it is that can spell serious trouble. See yourself as a wildebeest looking to visit the watering hole; crocodiles have a good memory so it’s best to avoid going to exactly the same location.
A great master of opening variety and surprise was the late Danish Grandmaster Bent Larsen. In the following game he grinds down Boris Spassky in a Bird’s Opening which led Boris Ivkov to spend a lot of time preparing against the Bird when he was due to play Larsen in a match. The Bird never reappeared so Ivkov, rather than have his heard work wasted, decided to play it himself!