This is a web-based software used to "manipulate" the seeds to get +4 on each roll. The main idea behind this is to use the seed BEFORE the NPC in the room moves right.

When you enter a room with 1 NPC, input the directions of the NPC. After you continue inputting the directions of the NPC, the software will predict which direction the NPC will move next based on the game's code. BEFORE the NPC is predicted to move right, use the seed to get +4.

Please note that sometimes the predictions are flawed, so it is a good idea to save before doing this. If it seems like the outputs are predicted different than the actual NPC movements, you may need to either re-enter the NPC movements or just continue with the inputs until the outputs from the software are correct.

Stepping out and back in the room continues on the same movement predictions and can help if an NPC moves against a corner.