ContinueOver10k.js

// ==UserScript==
// @name         ContinueOver10k
// @namespace    https://gist.github.com/vincentsimard/7a565fd253d18896e5b0507d73e416d8
// @version      0.1
// @description  After 10000 puzzles completed, lichess prevent you from solving anymore.
//               This script changes the continue button so it sends you to the next puzzle
// @author       Vincent Simard
// @match        https://en.lichess.org/training/*
// @grant        none
// ==/UserScript==

(function() {
  'use strict';

  $(document).on('DOMNodeInserted', function(e) {
    if (!$('.continue.button', e.target).length) { return; }

    var continueButton = document.querySelector('.continue.button');
    var newButton = continueButton.cloneNode(true);
    var goToNextPuzzle = function() {
      var url = window.location.href;
      var lastSegment = url.split('/').pop();
      var newUrl = url.replace(lastSegment, parseInt(lastSegment, 10) + 1);

      window.location.href = newUrl;
    };

    continueButton.parentNode.replaceChild(newButton, continueButton);

    newButton.addEventListener('click', goToNextPuzzle, false);
  });
})();