Sudoku maken | Gratis online Sudoku Maker

1 Titel

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2 Formaat

3 Moeilijkheid

Sudoku wordt gemaaktDe puzzel wordt automatisch gecontroleerd.

4 Werkblad

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Sudoku wordt gemaaktDe preview verschijnt automatisch.

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';
(function(global){
'use strict';

const CONFIGS = {
  4: { size:4, boxRows:2, boxCols:2, digits:[1,2,3,4], clueBands:{easy:[10,12], normal:[8,10], hard:[6,8]} },
  6: { size:6, boxRows:2, boxCols:3, digits:[1,2,3,4,5,6], clueBands:{easy:[24,28], normal:[18,22], hard:[14,18]} },
  9: { size:9, boxRows:3, boxCols:3, digits:[1,2,3,4,5,6,7,8,9], clueBands:{easy:[42,48], normal:[34,40], hard:[27,33]} }
};

function getConfig(size){
  const c=CONFIGS[Number(size)];
  if(!c) throw new Error('UNSUPPORTED_SIZE');
  return c;
}

// Independent solution counter: deliberately does not use masks/boxIndex/buildMasks.
function countSolutionsIndependent(input,cfgOrSize,limit=2){
  const cfg=typeof cfgOrSize==='object'?cfgOrSize:getConfig(cfgOrSize),n=cfg.size,board=input.slice();
  function allowed(idx,d){
    const r=Math.floor(idx/n),c=idx%n;
    for(let x=0;x<n;x++){if(x!==c&&board[r*n+x]===d)return false;if(x!==r&&board[x*n+c]===d)return false;}
    const br=Math.floor(r/cfg.boxRows)*cfg.boxRows,bc=Math.floor(c/cfg.boxCols)*cfg.boxCols;
    for(let rr=br;rr<br+cfg.boxRows;rr++)for(let cc=bc;cc<bc+cfg.boxCols;cc++){
      const j=rr*n+cc;if(j!==idx&&board[j]===d)return false;
    }
    return true;
  }
  for(let i=0;i<n*n;i++){const v=board[i];if(v&&(v<1||v>n||!allowed(i,v)))return {count:0,firstSolution:null,nodes:0};}
  let count=0,firstSolution=null,nodes=0;
  function dfs(){
    if(count>=limit)return;nodes++;
    let best=-1,bestCandidates=null;
    for(let i=0;i<n*n;i++)if(!board[i]){
      const cand=[];for(let d=1;d<=n;d++)if(allowed(i,d))cand.push(d);
      if(cand.length===0)return;
      if(bestCandidates===null||cand.length<bestCandidates.length){best=i;bestCandidates=cand;if(cand.length===1)break;}
    }
    if(best<0){count++;if(count===1)firstSolution=board.slice();return;}
    for(const d of bestCandidates){board[best]=d;dfs();board[best]=0;if(count>=limit)return;}
  }
  dfs();return {count,firstSolution,nodes};
}

function targetClueCount(cfg,difficulty,rng){
  const [min,max]=cfg.clueBands[difficulty];
  let values=[];for(let v=min;v<=max;v++)values.push(v);
  // Symmetric pair removals mean even-sized boards retain even clue counts.
  if(cfg.size%2===0)values=values.filter(v=>v%2===0);
  return values[randInt(rng,values.length)]||Math.round((min+max)/2);
}

function removalGroups(cfg,rng){
  const total=cfg.size*cfg.size,seen=new Set(),groups=[];
  for(let i=0;i<total;i++){
    if(seen.has(i))continue;const j=total-1-i;seen.add(i);seen.add(j);groups.push(i===j?[i]:[i,j]);
  }
  return shuffle(groups,rng);
}

const api={CONFIGS,getConfig,createRng,generateFullSolution,validateComplete,countSolutionsFast,countSolutionsIndependent,humanSolve,finalValidate,generatePuzzle,generateSet,boxIndex};
if(typeof module!=='undefined'&&module.exports)module.exports=api;
global.KlasklaarSudokuEngine=api;
})(typeof window!=='undefined'?window:globalThis);

(function(){
'use strict';
const root=document.getElementById('kksu-sudoku-root');
if(!root||root.dataset.kksuInitialized==='1')return;
root.dataset.kksuInitialized='1';
const E=window.KlasklaarSudokuEngine;
if(!E)throw new Error('SUDOKU_ENGINE_MISSING');

function selectButtons(selector,key,value){qa(selector).forEach(b=>b.classList.toggle('active',String(b.dataset[key])===String(value)));}

function instruction(size){return 'Vul de lege vakjes in met de cijfers 1 t/m '+size+'. Elk cijfer komt één keer voor in iedere rij, kolom en dik omlijnd blok.';}
function studentFieldsHtml(){
  const fields=[];
  if(els.showName.checked)fields.push(['Naam','42mm']);
  if(els.showGroup.checked)fields.push(['Groep','26mm']);
  if(els.showDate.checked)fields.push(['Datum','30mm']);
  if(!fields.length)return '';
  return '<div class="kksu-print-student-row">'+fields.map(([label,w])=>'<div class="kksu-print-student-field"><span class="kksu-print-student-label">'+label+'</span><span class="kksu-print-student-line" style="min-width:'+w+'"></span></div>').join('')+'</div>';
}

function puzzleBlock(result,index,solutionMode,count){
  const single=count===1;
  let mm;
  if(single) mm=result.size===4?108:result.size===6?124:138;
  else mm=result.size===4?78:result.size===6?82:88;
  const label=count===2?'<div class="kksu-print-puzzle-label">Sudoku '+(index+1)+'</div>':'';
  return '<div class="kksu-print-puzzle '+(single?'single':'double')+'">'+label+sudokuSvg(result,solutionMode,mm)+'</div>';
}

function sheetHtml(solutionMode){
  if(!state.results)return '';
  const title=esc(els.title.value.trim()||'Sudoku'),count=state.results.length;
  const body=count===1
    ?'<div class="kksu-print-puzzles one">'+puzzleBlock(state.results[0],0,solutionMode,count)+'</div>'
    :'<div class="kksu-print-puzzles two">'+state.results.map((r,i)=>puzzleBlock(r,i,solutionMode,count)).join('')+'</div>';
  const info=solutionMode?'Antwoordblad · '+state.size+' × '+state.size:instruction(state.size);
  return '<section class="kksu-print-page">'+
    '<div class="kksu-print-content">'+
      '<header class="kksu-print-header"><div class="kksu-print-heading"><div class="kksu-print-kicker">Sudoku</div><h1 class="kksu-print-title">'+title+'</h1></div><div class="kksu-print-logo-box"><img class="kksu-print-logo" src="'+window.__KKSU_LOGO_DATA+'" alt="Klasklaar"></div></header>'+
      studentFieldsHtml()+
      '<p class="kksu-print-instruction">'+esc(info)+'</p>'+body+
      '<div class="kksu-print-footer">Klasklaar.nl</div>'+ 
    '</div></section>';
}

function renderPreview(){
  if(!state.results)return;
  if(state.activeTab==='solution'&&!els.includeSolution.checked)state.activeTab='student';
  qa('.tab').forEach(t=>t.classList.toggle('active',t.dataset.tab===state.activeTab));
  const solTab=q('.tab[data-tab="solution"]');if(solTab)solTab.style.display=els.includeSolution.checked?'':'none';
  els.stage.innerHTML='<div class="kksu-preview-page-wrap kksu-doc" id="kksu-previewPageWrap">'+sheetHtml(state.activeTab==='solution')+'</div>';
  requestAnimationFrame(fitSheet);
}

function fitSheet(){
  const wrap=q('#kksu-previewPageWrap');if(!wrap)return;
  const page=wrap.querySelector('.kksu-print-page');if(!page)return;
  wrap.style.transform='none';
  const stageW=els.stage.clientWidth,baseW=page.getBoundingClientRect().width;
  if(!stageW||!baseW)return;
  const maxScale=1.42,scale=Math.min(maxScale,Math.max(.25,(stageW-8)/baseW));
  wrap.style.transform='scale('+scale+')';wrap.style.left=Math.max(0,(stageW-baseW*scale)/2)+'px';wrap.style.top='0px';
  els.stage.style.height=Math.ceil(page.getBoundingClientRect().height*scale+8)+'px';
}

function scheduleRender(){if(state.results)renderPreview();}

qa('.size-card').forEach(b=>b.addEventListener('click',()=>{const v=Number(b.dataset.size);if(v===state.size)return;state.size=v;selectButtons('.size-card','size',v);state.seed=makeSeed();updateMeta();generate();}));
qa('.level').forEach(b=>b.addEventListener('click',()=>{const v=b.dataset.level;if(v===state.difficulty)return;state.difficulty=v;selectButtons('.level','level',v);state.seed=makeSeed();updateMeta();generate();}));
qa('.count-choice').forEach(b=>b.addEventListener('click',()=>{const v=Number(b.dataset.count);if(v===state.count)return;state.count=v;selectButtons('.count-choice','count',v);state.seed=makeSeed();updateMeta();generate();}));
els.title.addEventListener('input',scheduleRender);
[els.showName,els.showGroup,els.showDate].forEach(x=>x.addEventListener('change',scheduleRender));
els.includeSolution.addEventListener('change',()=>{if(!els.includeSolution.checked&&state.activeTab==='solution')state.activeTab='student';scheduleRender();});
els.newBtn.addEventListener('click',()=>{state.seed=makeSeed();generate();});
qa('.tab').forEach(t=>t.addEventListener('click',()=>{if(t.dataset.tab==='solution'&&!els.includeSolution.checked)return;state.activeTab=t.dataset.tab;renderPreview();}));
window.addEventListener('resize',()=>requestAnimationFrame(fitSheet));

selectButtons('.size-card','size',state.size);selectButtons('.level','level',state.difficulty);selectButtons('.count-choice','count',state.count);updateMeta();generate();
})();