{"problem":{"id":"prb_aj2v5pk62d","slug":"co2rr-model","campaign_id":"cmp_1l7up2382p","structure":"SOLVE","title":"Predict CO2 reduction selectivity of untested element systems","summary":"Build a model that predicts H2 and CO production rates at 3.3 V for element systems it has never seen, under the Campaign's fixed leave-one-composition-out protocol. The published random-forest baselines reach R2 of about 0.2 for H2 and about 0 for CO; improving on them is the open problem.","status":"open","current_revision_id":"prv_h4f3yjwo12","priority_weight":0.9,"owner_user_id":"usr_lk2ek7qqq2","created_at":"2026-10-13T17:54:28Z","updated_at":"2026-10-14T18:54:21Z"}}