Frustration is when you throw away a well played game with a winning endgame position. Here is how you do it:
A) You attempt a “flashy” move; the hubris in us.
B) Inaccurate calculation.
C) Over excitement that lends itself to “rushing” in-game analysis.
…and whala…you hand a win over to your opponent on a silver board.
The lessons here are always stay within yourself, remain steadfast in your play, stay true to end game basics and never ever attempt to be “flashy”!