Chordle is modelled on the popular game Wordle, so if you know Wordle you should understand Chordle quickly.
There are three basic elements on the screen:
The first thing to do, is to listen to the chord, by clicking on the Play Chord button.
When you click on this button, you should hear the notes of the chord played one after each other.
The first note is in the range C3 to B3, which is the octave below middle C, so it is one of the twelve notes shown below:
After listening to the chord, you can try to guess the notes in the chord, and enter them via the piano keyboard.
You can enter notes on the piano keyboard
Using the keyboard, use the SHIFT key to enter flat notes, and the CONTROL or COMMAND key to enter sharp notes. For example, use SHIFT-B to enter B♭.
The notes you enter are displayed in the grid.
After you have entered five notes, use the enter button, or the Enter-Key on the keyboard, to enter your guess.
After entering your guess, the tiles will be colored to indicate how close you are to the correct soultion.
A green backround means, that the note is in the chord and at the right position. In the chord shown above, the green D indicates that the chord ends with a D.
A yellow background means, that the note is in the chord, but in a different position. The yellow G means that there is a G in the chord, but not as the third note.
Notes with a grey background are not in the chord. The piano-keys associated with these notes are now marked with a pattern of diagonal lines (or hatching).
You can still use these keys, but they are not in the correct solution.
To the left and right of your guess are two additional elements.
To the right of your guess is the name of the chord that you entered.
To the left is a play button, with which you can listen to the chord.
By listening to your guess, and to the chord which is the solution, you can compare if the notes are higher or lower. This may help you to find the root note.
At this point, you might guess that G is the root note of the chord, which would make D the fifth. About the simplest chord we could enter would be
There are always at least three different notes in a chord, but notes can be repeated.
That was a pretty good guess, but it is not the correct answer.
Now we know that G is the root note and B is the second note. That means that the solution is a G chord, but it must contain some some other notes, like the sixth, seventh or ninth. By listening to the chord, you may be able to intervals between the notes.
In this case, the solution is
After entering this chord, all the tiles are green.
At the same time, a dialog is displayed, showing the solution and some statistics about the chordles you have solved uo to now.