Three cairns, three hidden stone codes. Each code is 4 different stones from A-H. Probe it, read the marks, crack it in as few probes as you can.
Cairn 1 / 3Probes this cairn 0 / 10Score 0
Rules: stones A-H, no repeats in the code. Each probe is 4 different letters. Feedback: R = right stone in the right place, W = right stone in the wrong place. Cracking on probe n pays 110 - 10n (probe 1 = 100, probe 10 = 10). Ten probes without a crack pays 0 and the next cairn begins. Max score 300.