Ruslan Sinulla Ogly Hajiev,
an Azerbaijani psychologist and computer scientist. In 1975, while affiliated with the Republican Information and Computing Centre, Ministry of Health of the Azerbaijan SEER, Baku , he tried to identify typical tactical motifs by observing the chess master's eye movement when searching for a forced combination in a given position displayed on a large demonstration board. Hajiev reported that he was indeed able to derive from experimental data some important tactical relations which he later implemented in a chess-playing program. He gave examples of tactical positions in which his program was able to simulate the master's behavior with striking efficacy .
- Ruslan Hajiev (1975). Experimental Studies of Human Decision-Making and its Simulation by Situation Control Technique.. (on the basis of a chess endgame). IJCAI 1975, Tbilisi, Georgia, USSR, pdf