[taneq]

This is harder than Mastermind because you're not allowed to repeat colours/numbers in your entries.

Interestingly, I find I'm using some similar logic to what I use playing Minesweeper. "Three of this quartet are in the pattern, one of this quartet is in the pattern, they overlap in two places, therefore the two non-overlapped points in the three-scoring quartet must be in the pattern."

First try took 19 attempts, second try took 13 and I think I can do better.