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SELECT A.SUBMISSION_DATE , A.CNT , B.CL2 , B.NAME FROM 
(
    SELECT TB8.SUBMISSION_DATE , COUNT(TB8.HACKER_ID) AS CNT FROM 
(
    SELECT TB6.SUBMISSION_DATE , TB6.HACKER_ID FROM 
    (
        SELECT SUBMISSION_DATE , HACKER_ID 
        FROM SUBMISSIONS GROUP BY SUBMISSION_DATE , HACKER_ID
    )AS TB6
    WHERE TB6.HACKER_ID IN 
    (
        SELECT TB7.HACKER_ID FROM 
        (
            SELECT SUBMISSION_DATE , HACKER_ID
            FROM SUBMISSIONS GROUP BY SUBMISSION_DATE , HACKER_ID
        ) AS TB7
        WHERE TB7.SUBMISSION_DATE <= TB6.SUBMISSION_DATE
        GROUP BY TB7.HACKER_ID 
        HAVING COUNT(TB7.HACKER_ID) = DATEDIFF(TB6.SUBMISSION_DATE,'2016-03-01')+1  
    )
) AS TB8
GROUP BY TB8.SUBMISSION_DATE
) AS A 
JOIN 
(
SELECT A.SUBMISSION_DATE , A.CL2 , B.NAME FROM 
(
    SELECT TB2.SUBMISSION_DATE ,
    (
        SELECT HACKER_ID
        FROM SUBMISSIONS 
        WHERE SUBMISSION_DATE = TB2.SUBMISSION_DATE
        GROUP BY SUBMISSION_DATE, HACKER_ID
        ORDER BY COUNT(HACKER_ID) DESC , HACKER_ID ASC LIMIT 1 
    ) AS CL2
    FROM 
    (SELECT DISTINCT (SUBMISSION_DATE) AS SUBMISSION_DATE FROM SUBMISSIONS)
    AS TB2
) AS A
LEFT JOIN 
HACKERS AS B 
ON A.CL2 = B.HACKER_ID
) AS B 
ON A.SUBMISSION_DATE = B.SUBMISSION_DATE 
ORDER BY A.SUBMISSION_DATE