Mercatura
Commodities are a geography problem: everything is produced where it isn't consumed. Three ways to test yourself - click the right spot on the map.
Producers, chokepoints, ports and trade flows. Click the right spot on the map. Everyone gets the same questions, so the board is fair. 100 points per right answer, plus up to 99 for speed. Most points tops the board.
Given a commodity, click the top producing / exporting countries. When there are several giants, you must find all of them.
The ~9 straits and canals where seaborne trade - and price risk - actually lives. Click the location on the map.
Origin is highlighted. Click where the cargo first ships to - a country, or a whole region for hub-processed goods (cocoa, LNG). Find every big corridor.
The terminals the trade funnels through. Given a port and its claim to fame, click where it sits - one shot, graded on how close you land.
A shuffled mix of all three modes. The full commodity-geography workout.