24/20 13/8 is the modern preference over the older 13/8 13/9.
24/20 13/8Modern consensus
The position after 24/20 13/8. The 20-point is highlighted.
Why this play
The 20-point is called the golden anchor for a reason: it is the best defensive point on the board and it sits exactly where your opponent wants to build.
Putting a checker there immediately threatens to make it. If you do, your back checkers are safe for the rest of the game and you can play the front position freely.
13/8 is the safe half of the roll either way, so the whole decision is what to do with the 4.
The mistake to avoid
13/8 13/9 is playable but passive. It builds at the cost of leaving the back checkers stuck deep.
How settled is this? Modern consensus. Computer rollouts changed the standard answer here, so older books may disagree.
Knowing the play and making it under pressure are different skills
Play a rated game and the computer reviews every decision you made afterwards, including this one. The dice are sealed before you move and verifiable after, so what the review measures is you.