Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_29256 ( "Overall rank" real, "Country" text, "Overall life expectancy" real, "Male life expectancy" real, "Male rank" real, "Female life expectancy" real, "Female rank" real )

### Question ###
Name the most overall rank for czech republic

### Accurate SQL ###

SELECT MAX("Overall rank") FROM table_29256 WHERE "Country" = 'Czech Republic'