I am checking for repetitions before looking into hash table, but if the same situations happens for a second time, there is no repetition and program returns what is in ttable. Do you mean to use ttable only is such a situation on board has never occured before, and otherwise just evalute position ...

Hi! I am writing my own engine, and i have just implemented transposition table, and now i have a problem with threefold repetion.

This is a snippet from my alphabeta function:

if (CountRepetitions(currentBoardHash) >= 3) // threefold repetition
return DRAW;

int tableScore = transpositionTable ...