Key 4 – Hint 4

Now you need to find the right order for bringing the horizontal sliders into an unlocked position. The principle is the following: when you unlock the first horizontal slider – the vertical slider should still be able to move freely in 3 positions. When you unlock the second horizontal slider – the vertical slider should still be able to move freely in 2 positions. Etc. If shifting the first horizontal slider “locks” the vertical slider – this was not the right slider to start with