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_name_51 (co_champions INTEGER, records VARCHAR, pct VARCHAR, mrc_championships VARCHAR)

### Question ###
What is the highest value for co-champions when the PCT is less than 0.786 and MRC championships is 6 with records of 88-45-6?

### Accurate SQL ###

SELECT MAX(co_champions) FROM table_name_51 WHERE pct < 0.786 AND mrc_championships = 6 AND records = "88-45-6"