Before the operation, the rules of the puzzle will be explained to the patients in the intervention group and how it will be applied will be shown. Then, Patient Diagnosis Form, Mini-Mental State Test and Quality of Life Scale will be administered.On the 1st, 2nd and 3rd days after the surgery, the rules of the puzzle will be reminded again and the puzzle will be applied to the patients once a day. After the puzzle application on the 1st, 2nd and 3rd days after the surgery, the Mini-Mental State Test will be applied to the patients. Postoperative Recovery Index and Quality of Life Scale will be applied on the 3rd postoperative day.

Patients in the control group will be followed according to routine clinical procedure. Since there are no procedures or interventions in clinical procedures, only patient monitoring will be performed. The patients in the control group will also be followed and evaluated with the same forms at the same time.

Five expert opinions will be taken for the puzzle application to be applied after the surgery, and the application and difficulty level of the puzzle will be decided.

1st, 2nd and 3rd days after the surgery, the puzzle will be applied to the patients once a day. Then the Standardized Mini-Mental Test will be applied to the patients.This test is a measurement tool that can be easily administered within 5-10 minutes, does not include questions about mental processes, and focuses only on cognitive processes.The Standardized Mini Mental Test consists of 11 items under 5 main headings: orientation (10 points), attention and calculation (5 points), recording (3 points) and recall memory (3 points) and language (9 points). It is evaluated out of 30 points. The increase in the score obtained from the test indicates that the severity of cognitive destruction decreases.

Postoperative Recovery Index will be applied on the 3rd postoperative day. Postoperative Recovery Index consists of 5 sub-dimensions and 25 items. Sub dimensions; psychological symptoms, physical activities, general symptoms, intestinal symptoms, and craving-desire symptoms. While determining the sub-dimension score, the scores of the related items are summed and their arithmetic averages are taken. For the total score; All items are summed and the arithmetic average is taken. It states that the higher the scores obtained from the index, the more difficulty in post-operative recovery, and the easier the post-operative recovery as the scores decrease.

Quality of Life Scale in Older People (CASP-19) will be applied on the 3rd postoperative day. The scale consists of 19 items and four sub-dimensions. These sub-dimensions are control, autonomy, pleasure, and self-actualization. Each item of the original scale was graded as a 4-point Likert-type scale ranging from "never" (0 points) to "always" (3 points). Scale items are scored between 0 and 3 points. An increase in the score obtained from the scale indicates an increase in the quality of life.