https://rphilips.github.io/okra/puzzles/Recent content in Puzzels on StartHugonlOKRA-Ekehttps://rphilips.github.io/okra/puzzles/pion1/Thu, 09 Apr 2026 15:36:46 +0200https://rphilips.github.io/okra/puzzles/pion1/<!-- .diagram puzzle.pgn --> <p><img src="https://rphilips.github.io/okra/puzzles/pion1/da0cd102.svg" alt=""></p> <p>Wit speelt en wint!</p> <!-- .puzzle puzzle.pgn --> <div id="board">&#160;</div> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <style> san {color: black;} </style> <script> config = { pgn: `[Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "?"] [Black "?"] [Result "*"] [SetUp "1"] [FEN "8/5p2/4p3/8/3P4/5k2/P7/5K2 w - - 0 1"] [Link "https://www.chess.com/analysis/game/pgn/fiXS8Ti8N/analysis"] 1. d5 exd5 2. a4 *`, position: 'start', showCoords: true, orientation: 'white', theme: 'blue', pieceStyle: 'wikipedia', figurine: 'merida', locale: 'en', timerTime: '', layout: 'top', showFen: false, coordsInner: false, manyGames: false, coordsFactor: '1.0', coordsFontSize: '', colorMarker: '', startPlay: '', hideMovesBefore: true, notation: 'long', notationLayout: 'list', resizable: true, headers: false,}; var board = PGNV.pgnPuzzle('board', config); </script>https://rphilips.github.io/okra/puzzles/pion2/Thu, 09 Apr 2026 15:36:46 +0200https://rphilips.github.io/okra/puzzles/pion2/<!-- .diagram puzzle.pgn --> <p><img src="https://rphilips.github.io/okra/puzzles/pion2/da0cd102.svg" alt=""></p> <p>Zwart speelt en houdt remise!</p> <!-- .puzzle puzzle.pgn --> <div id="board">&#160;</div> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <style> san {color: black;} </style> <script> config = { pgn: `[Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "?"] [Black "?"] [Result "*"] [SetUp "1"] [FEN "8/2k5/1p6/5K2/7P/8/8/8 b - - 0 1"] [Link "https://www.chess.com/analysis/game/pgn/4PkeitpvYn/analysis"] 1... Kd7 2. Kg6 b5 3. h5 b4 $1 4. h6 b3 5. h7 b2 $1 6. h8=Q b1=Q+ $1 *`, position: 'start', showCoords: true, orientation: 'white', theme: 'blue', pieceStyle: 'wikipedia', figurine: 'merida', locale: 'en', timerTime: '', layout: 'top', showFen: false, coordsInner: false, manyGames: false, coordsFactor: '1.0', coordsFontSize: '', colorMarker: '', startPlay: '', hideMovesBefore: true, notation: 'long', notationLayout: 'list', resizable: true, headers: false,}; var board = PGNV.pgnPuzzle('board', config); </script>https://rphilips.github.io/okra/puzzles/pion3/Thu, 09 Apr 2026 15:36:46 +0200https://rphilips.github.io/okra/puzzles/pion3/<!-- .diagram puzzle.pgn --> <p><img src="https://rphilips.github.io/okra/puzzles/pion3/da0cd102.svg" alt=""></p> <p>Wit speelt en houdt remise!</p> <!-- .puzzle puzzle.pgn --> <div id="board">&#160;</div> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <style> san {color: black;} </style> <script> config = { pgn: `[Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "?"] [Black "?"] [Result "*"] [SetUp "1"] [FEN "4k3/4p3/8/8/8/8/8/4K3 w - - 0 1"] [Link "https://www.chess.com/analysis/game/pgn/5h4vSeJSy4/analysis"] 1. Ke2 Kd7 2. Kd3 Ke6 3. Ke4 $1 *`, position: 'start', showCoords: true, orientation: 'white', theme: 'blue', pieceStyle: 'wikipedia', figurine: 'merida', locale: 'en', timerTime: '', layout: 'top', showFen: false, coordsInner: false, manyGames: false, coordsFactor: '1.0', coordsFontSize: '', colorMarker: '', startPlay: '', hideMovesBefore: true, notation: 'long', notationLayout: 'list', resizable: true, headers: false,}; var board = PGNV.pgnPuzzle('board', config); </script>https://rphilips.github.io/okra/puzzles/pion4/Wed, 15 Apr 2026 10:32:14 +0200https://rphilips.github.io/okra/puzzles/pion4/<!-- .diagram puzzle.pgn --> <p><img src="https://rphilips.github.io/okra/puzzles/pion4/da0cd102.svg" alt=""></p> <p>Dit is het eindspel uit de partij Maroczy - Marshall gespeeld in 1903 te Monte Carlo.</p> <p>Zwart speelt en wint!</p> <!-- .puzzle puzzle.pgn --> <div id="board">&#160;</div> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <style> san {color: black;} </style> <script> config = { pgn: `[Event ""] [Site ""] [Date ""] [Round ""] [White ""] [Black ""] [Result "*"] [FEN "8/8/8/8/6p1/5k2/7K/8 b - - 0 1"] [SetUp "1"] 1...Kf2 2.Kh1 Kg3 3.Kg1 Kh3 4.Kh1 g3 5.Kg1 g2 6.Kf2 Kh2 *`, position: 'start', showCoords: true, orientation: 'white', theme: 'blue', pieceStyle: 'wikipedia', figurine: 'merida', locale: 'en', timerTime: '', layout: 'top', showFen: false, coordsInner: false, manyGames: false, coordsFactor: '1.0', coordsFontSize: '', colorMarker: '', startPlay: '', hideMovesBefore: true, notation: 'long', notationLayout: 'list', resizable: true, headers: false,}; var board = PGNV.pgnPuzzle('board', config); </script>https://rphilips.github.io/okra/puzzles/pion5/Wed, 15 Apr 2026 11:11:29 +0200https://rphilips.github.io/okra/puzzles/pion5/<!-- .diagram puzzle.pgn --> <p><img src="https://rphilips.github.io/okra/puzzles/pion5/da0cd102.svg" alt=""></p> <p>Dit is een gevecht om de sleutelvelden en de oppositie.</p> <p>Wit speelt en houdt remise.</p> <!-- .puzzle puzzle.pgn --> <div id="board">&#160;</div> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <style> san {color: black;} </style> <script> config = { pgn: `[Event ""] [Site ""] [Date ""] [Round ""] [White ""] [Black ""] [Result "*"] [FEN "8/8/k5p1/8/8/8/K7/8 w - - 0 1"] [SetUp "1"] 1.Kb2 Kb6 2.Kc2 Kc6 3.Kd2 Kd6 4.Ke2 Ke6 5.Kf2 Kf6 6.Kg2 Kg5 7.Kg3 *`, position: 'start', showCoords: true, orientation: 'white', theme: 'blue', pieceStyle: 'wikipedia', figurine: 'merida', locale: 'en', timerTime: '', layout: 'top', showFen: false, coordsInner: false, manyGames: false, coordsFactor: '1.0', coordsFontSize: '', colorMarker: '', startPlay: '', hideMovesBefore: true, notation: 'long', notationLayout: 'list', resizable: true, headers: false,}; var board = PGNV.pgnPuzzle('board', config); </script>https://rphilips.github.io/okra/puzzles/amazing/Thu, 09 Apr 2026 13:40:52 +0200https://rphilips.github.io/okra/puzzles/amazing/<!-- .diagram game.pgn --> <p><img src="https://rphilips.github.io/okra/puzzles/amazing/52267a89.svg" alt=""></p> <p>Wit speelt en wint!</p> <!-- .tube https://www.youtube.com/watch?v=MP2-0tV4BIM --> <div style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"> <iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share; fullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube.com/embed/MP2-0tV4BIM?autoplay=0&amp;controls=1&amp;end=0&amp;loop=0&amp;mute=0&amp;start=0" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" title="YouTube video"></iframe> </div> <!-- .dropbox https://www.dropbox.com/scl/fi/6o8p8tc4bxvgoxu2letgn/AMAZING-Chess-Puzzle-From-Reddit.mp4?rlkey=ylzofhcyrn1uakh6l8497uqoj&st=j6sz1qzz&dl=0 --> <p>Je kan de video ook bekijken op <a href="https://www.dropbox.com/scl/fi/6o8p8tc4bxvgoxu2letgn/AMAZING-Chess-Puzzle-From-Reddit.mp4?rlkey=ylzofhcyrn1uakh6l8497uqoj&amp;st=j6sz1qzz&amp;dl=0">dropbox</a></p> <!-- .puzzle game.pgn --> <div id="board">&#160;</div> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <style> san {color: black;} </style> <script> config = { pgn: `[Event ""] [Site ""] [Date ""] [Round ""] [White ""] [Black ""] [Result ""] [FEN "n1QBq1k1/5p1p/5KP1/p7/8/8/8/8 w - - 0 1"] [SetUp "1"] 1.Bc7 Qxc8 2.gxf7+ Kh8 3.Be5 Qc5 4.Bb2 Nc7 5.Ba1 a4 6.Bb2 a3 7.Ba1 a2 8.Bb2 a1=Q 9.Bxa1 Qd6+ 10.Kf5+ Qe5+ 11.Bxe5#`, position: 'start', showCoords: true, orientation: 'white', theme: 'blue', pieceStyle: 'wikipedia', figurine: 'merida', locale: 'en', timerTime: '', layout: 'top', showFen: false, coordsInner: false, manyGames: false, coordsFactor: '1.0', coordsFontSize: '', colorMarker: '', startPlay: '', hideMovesBefore: true, notation: 'long', notationLayout: 'list', resizable: true, headers: false,}; var board = PGNV.pgnPuzzle('board', config); </script>https://rphilips.github.io/okra/puzzles/whitewins/Tue, 12 May 2026 18:59:22 +0200https://rphilips.github.io/okra/puzzles/whitewins/<!-- .diagram puzzle.pgn --> <div style='cursor:pointer' onclick='navigator.clipboard.writeText("3K4/3P4/7B/8/8/8/7k/4r3 w - - 0 1"); return false'> <p><img src="https://rphilips.github.io/okra/puzzles/whitewins/f76e6203.svg" alt=""></p> </div> <p>Wit moet 3 zaken oplossen:</p> <ul> <li>hij moet zijn koning beschermen tegen de schaakjes door de zwarte toren</li> <li>hij moet zijn pion beschermen</li> <li>hij moet zijn pion weten te promoveren</li> </ul> <p>En dat lukt allemaal &hellip;</p> <!-- .tube https://www.youtube.com/watch?v=ud7cjSkTT80&list=PLlN1WdzKJmlLS17Yu35d7HPJqvpL9VKwM&index=7 --> <div style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"> <iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share; fullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube.com/embed/ud7cjSkTT80?autoplay=0&amp;controls=1&amp;end=0&amp;loop=0&amp;mute=0&amp;start=0" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" title="YouTube video"></iframe> </div> <!-- .dropbox https://www.dropbox.com/scl/fi/7d6o1345f8xkd69i3oylh/Find-White-s-Winning-Move.mp4?rlkey=gewy01fdkzj5pqp4naje77e3n&st=p3p7byk8&dl=0 --> <p>Je kan de video ook bekijken op <a href="https://www.dropbox.com/scl/fi/7d6o1345f8xkd69i3oylh/Find-White-s-Winning-Move.mp4?rlkey=gewy01fdkzj5pqp4naje77e3n&amp;st=p3p7byk8&amp;dl=0">dropbox</a></p>https://rphilips.github.io/okra/puzzles/retilike/Thu, 02 Apr 2026 18:33:54 +0200https://rphilips.github.io/okra/puzzles/retilike/<p>In deze puzzel is Wit aan zet.</p> <p>Hoe slaagt hij er in om gelijkspel te houden!</p> <p><img src="https://rphilips.github.io/okra/puzzles/retilike/0e3a1a59.svg" alt=""></p> <div style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"> <iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share; fullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube.com/embed/iCL0DSX59o4?autoplay=0&amp;controls=1&amp;end=0&amp;loop=0&amp;mute=0&amp;start=0" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" title="YouTube video"></iframe> </div> <p>Je kan de video ook bekijken op <a href="https://www.dropbox.com/scl/fi/v2x7g1e77na6iu03q150y/Believe-It-Or-Not-This-Position-Is-Draw.mp4?rlkey=ol5ijy5nlm0q3hfzjej370oke&amp;st=1rcksy1k&amp;dl=0">dropbox</a></p> <div id="board">&#160;</div> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <style> san {color: black;} </style> <script> config = { pgn: `[Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "?"] [Black "?"] [Result "*"] [SetUp "1"] [FEN "3K4/7p/3k4/P7/8/8/8/8 w - - 0 1"] [Link "https://www.chess.com/analysis/game/pgn/2rXzDnEgVc/analysis"] 1. Kc8 {0.00} (1. Kc8 Kc6 {0.00} 2. Kb8 Kb5 {0.00} 3. Kb7 $1 {0.00} 3... Kxa5 $1 4. Kc6 $1 h5 5. Kd5 $1) *`, position: 'start', showCoords: true, orientation: 'white', theme: 'blue', pieceStyle: 'wikipedia', figurine: 'merida', locale: 'en', timerTime: '', layout: 'top', showFen: false, coordsInner: false, manyGames: false, coordsFactor: '1.0', coordsFontSize: '', colorMarker: '', startPlay: '', hideMovesBefore: true, notation: 'long', notationLayout: 'list', resizable: true, headers: false,}; var board = PGNV.pgnPuzzle('board', config); </script>https://rphilips.github.io/okra/puzzles/p1000/Mon, 23 Feb 2026 10:41:05 +0100https://rphilips.github.io/okra/puzzles/p1000/<p>Winst of verlies zit hem vaak in de details.</p> <p>Wit speelt en &hellip; wint!</p> <p><img src="https://rphilips.github.io/okra/puzzles/p1000/p1000.png" alt=""></p> <div style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"> <iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share; fullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube.com/embed/TCC8uzoQ1bQ?autoplay=0&amp;controls=1&amp;end=0&amp;loop=0&amp;mute=0&amp;start=0" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" title="YouTube video"></iframe> </div> <p>Je kan de video ook bekijken op <a href="https://www.dropbox.com/scl/fi/cg0rl1zs017a4i729kzf6/White-Is-Winning.mp4?rlkey=76ubfpy14h99eev8ufqrr7qs1&amp;st=biiwefo1&amp;dl=0">dropbox</a></p> <p>Of bekijk hier:</p> <div id="board">&#160;</div> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <style> san {color: black;} </style> <script> config = { pgn:`{Hint: Blokkeer de toegang van de zwarte toren tot de 8e rij.} 1. Bh7`, position: '8/3P2k1/8/3K4/8/3B3r/8/8 w - - 0 1', showCoords: true, orientation: 'white', theme: 'blue', pieceStyle: 'wikipedia', figurine: 'merida', locale: 'en', timerTime: '', layout: 'top', showFen: false, coordsInner: false, manyGames: false, coordsFactor: '1.0', coordsFontSize: '', colorMarker: '', startPlay: '', notation: 'long', notationLayout: 'list', resizable: true, headers: false, }; var board = PGNV.pgnPuzzle('board', config); </script>https://rphilips.github.io/okra/puzzles/chain/Mon, 09 Mar 2026 09:32:45 +0100https://rphilips.github.io/okra/puzzles/chain/<p>Moeilijke puzzels oplossen gaat - zoals steeds - via een plan.</p> <p>Deze puzzel is complex.</p> <p>Wit speelt en wint.</p> <p>Oplossing:</p> <ul> <li>identificeer de diverse problemen die Wit moet overwinnen</li> <li>zoek een oplossing voor die problemen</li> <li>breng de verschillende oplossingen samen</li> </ul> <p><img src="https://rphilips.github.io/okra/puzzles/chain/chain.png" alt=""></p> <div style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"> <iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share; fullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube.com/embed/XoqC3hL8cXU?autoplay=0&amp;controls=1&amp;end=0&amp;loop=0&amp;mute=0&amp;start=0" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" title="YouTube video"></iframe> </div> <p>Je kan de video ook bekijken op <a href="https://www.dropbox.com/scl/fi/vt9lpv2yesjaz0e2ahkgd/A-Viewer-Sent-Me-an-Insane-Position.mp4?rlkey=lqlhvesq3sdu0iyvhwsx602a4&amp;st=0g2ksz17&amp;dl=0">dropbox</a></p>https://rphilips.github.io/okra/puzzles/4rooks/Thu, 26 Mar 2026 13:25:21 +0100https://rphilips.github.io/okra/puzzles/4rooks/<p>Wit speelt en wint!</p> <p><img src="https://rphilips.github.io/okra/puzzles/4rooks/board.png" alt=""></p> <div style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"> <iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share; fullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube.com/embed/8vjAduplBYQ?autoplay=0&amp;controls=1&amp;end=0&amp;loop=0&amp;mute=0&amp;start=0" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" title="YouTube video"></iframe> </div> <p>Je kan de video ook bekijken op <a href="https://www.dropbox.com/scl/fi/gqlgcw4qxc3oszrwc5t5a/It-Looks-Equal-But-It-s-Not.mp4?rlkey=tufforyovmg4vcju0ad6hkra1&amp;st=726q6qe4&amp;dl=0">dropbox</a></p> <div id="board">&#160;</div> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <style> san {color: black;} </style> <script> config = { pgn: `[Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "?"] [Black "?"] [Result "*"] [SetUp "1"] [FEN "3rr2k/3R4/7K/8/8/8/8/4R3 w - - 0 1"] [Link "https://www.chess.com/practice/custom"] 1. Ree7 *`, position: 'start', showCoords: true, orientation: 'white', theme: 'blue', pieceStyle: 'wikipedia', figurine: 'merida', locale: 'en', timerTime: '', layout: 'top', showFen: false, coordsInner: false, manyGames: false, coordsFactor: '1.0', coordsFontSize: '', colorMarker: '', startPlay: '', hideMovesBefore: true, notation: 'long', notationLayout: 'list', resizable: true, headers: false,}; var board = PGNV.pgnPuzzle('board', config); </script>https://rphilips.github.io/okra/puzzles/smullyan/Thu, 26 Feb 2026 16:54:10 +0100https://rphilips.github.io/okra/puzzles/smullyan/<p>Raymond Merrill Smullyan (Mei 25, 1919 – Februari 6, 2017) was an Amerikaans wiskundige en filosoof die verscheidene boeken over schaken heeft geschreven.</p> <p>Meer informatie kan je lezen op <a href="https://en.wikipedia.org/wiki/Raymond_Smullyan">Wikipedia</a>.</p> <p>Zijn puzzels waren gericht op alternatief denken.</p> <p>Een bekende puzzel van hem is de <em>ontbrekende koning</em></p> <p>Bij een schaakpartij viel de witte koning van het bord en de spelers wisten niet meer waar deze precies op het bord stond.</p> <p>&hellip; en dit is de puzzel: je moet uitvinden waar de witte koning staat.</p>https://rphilips.github.io/okra/puzzles/testendgame/Wed, 13 May 2026 13:19:01 +0200https://rphilips.github.io/okra/puzzles/testendgame/<!-- .diagram puzzle.pgn --> <div style='cursor:pointer' onclick='navigator.clipboard.writeText("8/3Pk3/8/1K3P2/8/8/8/8 w - - 0 1"); return false'> <p><img src="https://rphilips.github.io/okra/puzzles/testendgame/d1aa19cf.svg" alt=""></p> </div> <p>In</p> <!-- .link articles/pawnbasic --> <p><a href="https://rphilips.github.io/okra/articles/pawnbasic/">Basis pionneneindspelen</a> <span style='font-size: smaller;cursor: pointer' onclick='navigator.clipboard.writeText("articles/pawnbasic");'>(artikel)</span></p> <p>leerden we de elementaire pionneneindspelen.</p> <p>Schaken is echter nooit eenvoudig zoals het volgende eindspel toont</p> <!-- .tube https://www.youtube.com/watch?v=mtPzy7adwbs&list=PLlN1WdzKJmlLS17Yu35d7HPJqvpL9VKwM&index=2 --> <div style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"> <iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share; fullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube.com/embed/mtPzy7adwbs?autoplay=0&amp;controls=1&amp;end=0&amp;loop=0&amp;mute=0&amp;start=0" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" title="YouTube video"></iframe> </div> <!-- .dropbox https://www.dropbox.com/scl/fi/psvad062dn1pbnfhns6mn/Test-Your-Endgame-Technique.mp4?rlkey=6q8vz6eecahydusc3wtfcv1sh&st=1ws4befd&dl=0 --> <p>Je kan de video ook bekijken op <a href="https://www.dropbox.com/scl/fi/psvad062dn1pbnfhns6mn/Test-Your-Endgame-Technique.mp4?rlkey=6q8vz6eecahydusc3wtfcv1sh&amp;st=1ws4befd&amp;dl=0">dropbox</a></p>https://rphilips.github.io/okra/puzzles/queenvsqueen/Sat, 11 Apr 2026 13:45:30 +0200https://rphilips.github.io/okra/puzzles/queenvsqueen/<!-- .diagram puzzle.pgn --> <p><img src="https://rphilips.github.io/okra/puzzles/queenvsqueen/da0cd102.svg" alt=""></p> <p>Wit speelt en wint!</p> <!-- .tube https://www.youtube.com/watch?v=EqrUVsVUvAg --> <div style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;"> <iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share; fullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube.com/embed/EqrUVsVUvAg?autoplay=0&amp;controls=1&amp;end=0&amp;loop=0&amp;mute=0&amp;start=0" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" title="YouTube video"></iframe> </div> <!-- .dropbox https://www.dropbox.com/scl/fi/9a569r8gs5brexn9tyw8l/White-to-move-and-win-and-it-s-amazing.mp4?rlkey=psn5dz2qhffzzmxykdfliz05m&dl=0 --> <p>Je kan de video ook bekijken op <a href="https://www.dropbox.com/scl/fi/9a569r8gs5brexn9tyw8l/White-to-move-and-win-and-it-s-amazing.mp4?rlkey=psn5dz2qhffzzmxykdfliz05m&amp;dl=0">dropbox</a></p> <!-- .puzzle puzzle.pgn --> <div id="board">&#160;</div> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <script src="https://rphilips.github.io/okra/js/pgnviewer.js"></script> <style> san {color: black;} </style> <script> config = { pgn: `[Event ""] [Site ""] [Date ""] [Round ""] [White ""] [Black ""] [Result ""] [FEN "2r5/1Pk1q3/8/4P3/3Q4/8/4K3/8 w - - 0 1"] [SetUp "1"] 1.Qb6+ Kb8 2.Qa7+ Kc7 3.bxc8=N+ Kxc8 4.Qxe7`, position: 'start', showCoords: true, orientation: 'white', theme: 'blue', pieceStyle: 'wikipedia', figurine: 'merida', locale: 'en', timerTime: '', layout: 'top', showFen: false, coordsInner: false, manyGames: false, coordsFactor: '1.0', coordsFontSize: '', colorMarker: '', startPlay: '', hideMovesBefore: true, notation: 'long', notationLayout: 'list', resizable: true, headers: false,}; var board = PGNV.pgnPuzzle('board', config); </script>