For conditional formatting, how to compare each number in a row with the first cell in that row?

[Rnkhch]

Hello,

I have several rows of numbers, and in each row, I need to check whether numbers after column A are at least 1 less than A, and if they are, I want them to be highlighted. I have attached an example XL2BB with manual highlighting of the relevant cells.

I'm having a hard time with the formula. I wrote this formula, but it highlights entire rows not the particular cells that satisfy the condition:

=($B1:$J1)<=($A1-1)

Also can this be done with just one formula for all the rows? Or each row would need its own formula?

Thanks for any input!

Book1
	A	B	C	D	E	F	G	H	I	J	K
1	3	7	3	6	9	6	8	7	8	7
2	8	7	3	6	4	4	4	6	3	4
3	7	7	8	6	4	5	6	6	3	5
4	9	4	4	4	8	3	5	6	4	3
5	6	7	3	5	9	8	5	7	8	5
6	6	3	9	7	6	8	6	4	9	9
7
Sheet1

 

[dave3009]

You can use the inbuilt "format cells that contain" for this

 

[Rnkhch]

Awesome, thank you for fast response! I was overthinking