In Blackjack, when you have a pair of 10s (such as two 10s or a 10 and a face card), the best play is generally not to split. The reasoning behind this is that a hand totaling 20 is already very strong, and splitting the 10s could lead to weaker hands, which increases the house edge.
When you split 10s, you risk turning a high-value hand into two separate hands that may not win as easily. In most cases, standing with a hard 20 is the optimal choice since it has a high probability of winning against any dealer upcard, except in rare cases when the dealer has a strong upcard like an Ace.
There are some rare exceptions where splitting 10s might be considered in specific casino variants or if you're employing advanced strategies like card counting, but for most players, sticking with the original hand of 20 is almost always the best play.
When you split 10s, you risk turning a high-value hand into two separate hands that may not win as easily. In most cases, standing with a hard 20 is the optimal choice since it has a high probability of winning against any dealer upcard, except in rare cases when the dealer has a strong upcard like an Ace.
There are some rare exceptions where splitting 10s might be considered in specific casino variants or if you're employing advanced strategies like card counting, but for most players, sticking with the original hand of 20 is almost always the best play.