Is there a list of standard endgame chess positions which a player can benefit from learning? By this I mean that any player should know how to play KQ vs K, KR vs B, KP vs K (win if it winnable and draw when it is not).
Then it goes KBB vs K, KRP vs KR and then on higher level KQ vs KR, KR vs KN, KBN vs K. These are just some of the end-game positions which might be helpful to learn.
Do you have other positions which could be helpful (and may be approximate level when it makes sense to learn them)?