This song is in the key of Bb on the recording. I chose to tab it in the key of A.
It modulates to the key of B for the second verse, then back to A for the ending.
A Amaj7 A6 A
Someone must feel like a fool tonight
A Bbdim Bm E
Knowing they let you go
Bm E Bm E
Someone is wishing they`d done you right
Bm E A
Regretting they hurt you so.
A Amaj7 A6 A
Now that you`re here in my loving arms
A A7 D
Forget all your yesterdays
Bm E A (Ab) F#m
Someone must feel like a fool to-night
(E) D E A
For letting you slip away.
https://www.coveralia.com/acordes/someone-must-feel-like-a-fool-tonight-kenny-rogers.php
(modulate to B major)
B Bmaj7 B6 B
When I see the moon shining in your eyes
B Cdim C#m F#
A feeling comes over me
C#m F# C#m F#
The warmth of your touch makes me realize
C#m F# B
Just how lucky can I be.
B Bmaj7 B6 B
Surely he knows and he`s sorry now
B B7 E
That he turned your love away
C#m F# B (Bb) Abm
Someone must feel like a fool to-night
(F#) E F# B
Knowing you`re here to stay.