Here’s one of the charts so far. Spell level runs along the top, b3d6 roll result along the left side. (Remember b is the backgammon betting die)

    <img class="alignnone" src="https://www.sycarion.com/wp-content/uploads/2017/10/WIP.png" alt="" />

Here's one of the charts so far. Spell level runs along the top, b3d6 roll result along the left side. (Remember b is the backgammon betting die)

Purple = critical success
Green = success
Orange = failure
Black = critical failure

In an OSR game, INT bonuses affect the result by allowing the player to take the result of the roll or a number of rows down equal to the INT bonus.

So if a character has +1 INT, the player can take the result of the roll or the result one row down from the roll. If they roll an 82, they can take either the result for 82 or for 5.