LG Game 2 Diagram, by LSATHacks
Main Diagram
Scenario 1
Scenario 2
Scenario 3
Note that I drew no separate rules for this game. The scenarios cover all the rules. But you still must know the rules. I found them easiest to memorize, but if you wanted to draw something you could draw this:
These are combined rules. For instance, the second one says T ➞ OR because we know that R requires OR.
Also, note that Rule 1 is entirely covered by the scenarios)
The question doesn’t specify that each student only handles one year, so how did you know these scenarios were correct? In Scenario 1, O could be in 1924 (Onyx has to be assigned to the year preceding Ryan’s, but Onyx can also be assigned to another space) and T can also be in 1924. In Scenario 2, O or L could also be in 1924. In Scenario 3, L could also be assigned to any other space aside from 1923.