Basically this, notice the minute difference in probability for Turn then for River? Which you obviously know is simply because you are taking one card out of the equation. More useful knowledge is your odds of winning after the flop with the turn and river both left. Therefore it would make more sense to have your "Either" column listed as "Turn", since you still have turn and river to catch. After the Turn, your River column is fine. Do you follow why I suggest this? Obviously its only a suggestion of how you display your data, but how useful is information regarding "am I going to catch on the turn or river", when what you really consider is "what are the odds of me catching after the flop? what are the odds of catching after the turn?". Where the odds of catching after the flop is the Probability of 1 in 47 + 1 in 46 and after the turn 1 in 46. Basically.