I wouldn’t call their videos training, more of guided solving of easy to monstrously difficult puzzles. You solving is the training. As a warning, if you start enjoying solving the featured puzzles, your old sources might lose the allure they once had.
Thanks for sharing this. Never been trained formally, just picked it by doing it in the papers. Would definitely check it out and see how I would do.
I wouldn’t call their videos training, more of guided solving of easy to monstrously difficult puzzles. You solving is the training. As a warning, if you start enjoying solving the featured puzzles, your old sources might lose the allure they once had.