it requires some minor knowledge about outputs but it's explained and visualization is good. Otherwise you get people confused with what validity is and why can't they be re-queued

(see #monero-support recent example)

added a small tool to the blocks site to show the mismatch on inputs across two different chains (canonical/orphan) blocks.p2pool.observer/tx/b9c17d37a…451b2dc625ba1cb9d2f4d6c352689c5ac7d