Let's clear up a common misconception right away: you cannot "split" a king in checkers. No official rule set—whether American checkers, International draughts, or any regional variant—includes a mechanic to divide a single king into multiple pieces. The idea likely stems from confusion with other games or a misunderstanding of promotion.
Instead of splitting, kings gain enhanced mobility that makes them the most dominant pieces on the board. Here's what sets them apart:
Kings are your most valuable assets—master their mobility, coordinate them with your remaining forces, and don't waste mental energy searching for a "split" mechanic that simply doesn't exist.