one digit guess ?

There are hooks that allow you to override the form in PHP. You can output an input field that only allows 1 char.

Other option is to insert some javascript in the front-end that changes the maxlength of each input. In its simplest form, this looks like this*:

jQuery(document).ready(function() {
    jQuery('input.prediction').attr('maxlength','1');
});

* not tested

Seems like number inputs ignore the maxlength property, so if you have this option enabled, then the above script is not enough. But luckily we can tweak it a bit:

jQuery(document).ready(function() {
	jQuery('input.prediction').attr('maxlength','1');
	jQuery(document).on('input','input[type=number].prediction', function() {
		this.value = this.value.slice(0,this.maxLength);
	});
});

Thanks for the answer,

…..”insert some javascript in the front-end that changes the maxlength of each input,

jQuery(document).ready(function() {
	jQuery('input.prediction').attr('maxlength','1');
	jQuery(document).on('input','input[type=number].prediction', function() {
		this.value = this.value.slice(0,this.maxLength);
	});
});

Stupid question, but the above code you helped me with, where do i insert that ?
Is it a part of a larger code or is this the code to have a single digit and if so where should i insert this piece of code, any of the Football Pool files ?

Again sorry for my lack of knowledge in the coding part…

You can use a plugin like Scripts n Styles, Woody code snippets or any other plugin that helps you to insert extra javascript code in your website. If you use such a plugin then you should insert the javascript near the closing body tag.

This code snippet is all you need.

Thanks ??