Cleaning up IF statements Python

Im trying to clean up my if statements, we're doing a group project and my counterparts says this code looks too confusing. Please give me tips on making it shorter or cleaning it up, the code currently looks like this;

for r in range(n):
        for col in range(n):
 
            # Skip, if it contains a mine
            if numbers[r][col] == -1:
                continue
 
            # Check up  
            if r > 0 and numbers[r-1][col] == -1:
                numbers[r][col] = numbers[r][col] + 1
            # Check down    
            if r < n-1  and numbers[r+1][col] == -1:
                numbers[r][col] = numbers[r][col] + 1
            # Check left
            if col > 0 and numbers[r][col-1] == -1:
                numbers[r] = numbers[r] + 1
            # Check right
            if col < n-1 and numbers[r][col+1] == -1:
                numbers[r][col] = numbers[r][col] + 1
            # Check top-left    
            if r > 0 and col > 0 and numbers[r-1][col-1] == -1:
                numbers[r][col] = numbers[r][col] + 1
            # Check top-right
            if r > 0 and col < n-1 and numbers[r-1][col+1]== -1:
                numbers[r][col] = numbers[r][col] + 1
            # Check below-left  
            if r < n-1 and col > 0 and numbers[r+1][col-1]== -1:
                numbers[r][col] = numbers[r][col] + 1
            # Check below-right
            if r < n-1 and col< n-1 and numbers[r+1][col+1]==-1:
                numbers[r][col] = numbers[r][col] + 1