1Quick start

Klaverjassen is a Dutch trick-taking game for four players in two teams. You play with Cheng Yi against the two Teslas. This room plays the Amsterdam rules, the most common way the game is played in the Netherlands.

1. Press Deal. Everyone draws one card: the highest card leads the first hand. Check the cards on the table and press Yes to play.
2. The player who leads (voorhand) chooses trump. In this game voorhand must choose: there is no passing.
3. The other team may double (kraken) when they think the players will lose. Then roem in hand is announced.
4. Play eight tricks. Click a card with a gold edge to play it: only the cards you may play have one.
5. The team that chose trump must score more than the other team, or it goes nat and scores nothing. The first team to reach the target wins the game.

2Table and teams

Partners sit opposite each other. Play always goes clockwise: south, west, north, east.

The game uses 32 cards: seven, eight, nine, ten, jack, queen, king and ace in clubs, diamonds, hearts and spades. Each player gets eight cards.

On the cards and in the score sheet the Dutch letters are used: B for the jack (boer), V for the queen (vrouw), H for the king (heer) and A for the ace (aas).

The cards are tarot cards in the style of the old Tarot de Marseille: the jack is a page with a staff, the queen and the king sit on their thrones, the ace is held up by a hand from a cloud, and the back shows the sun between two moons. Every card keeps large corner indices with its rank and suit, so you read it at a glance in your fan and on the table, and its name is written on the ribbon at the bottom. Every card has a spot of its own that rakes across it from the card's own upper left: the pips, numbers and letters are printed in relief and catch the light like embossing, so they read at a glance, in your hand and on the table. A card on the table lies in a soft pool of light and has the same relief as the cards in your hand. Every card on the table leans towards you on a slim brass card rest — yours, east's and west's a little, north's (the furthest) a little more — so you read them all at a glance, in play and in the draw for the lead.

Three aids help you tell the cards apart at a glance. The deck has four colours: klaveren green, ruiten blue, harten red and schoppen black, so hearts and diamonds, or clubs and spades, are never mixed up. Every trump card wears a gold rim, in your hand and on the table. And the card that is winning the trick so far lies in a golden pool of light.

Your own cards stand in a wide fan in your left hand, large enough to read every corner. Your left hand holds them as a card player does: the fan rises to the right out of your hand, the palm towards you, the fingers resting on the back of the fan and the thumb lying lightly over the front of the lower cards. Nothing of your hand ever goes through a card. On the table every card is shown large and turned towards you; the card of north, the player farthest from you, is a little larger still, so all four read alike from your seat.

3Cards and points

The order of the cards and their value depend on whether the suit is trump.

The tables are in order of strength, highest first. Any trump beats any card of another suit.

All cards together are worth 152 points. The last trick earns 10 extra, so there are 162 points in every hand.

For roem the cards count in their natural order: seven, eight, nine, ten, jack, queen, king, ace. So queen, king and ace is a run, and so is eight, nine and ten.

4Course of a game

Drawing for the lead

Before the first hand every player draws one card from the shuffled deck. The highest card leads the first hand. For this draw there is no trump, so the order is ace, ten, king, queen, jack, nine, eight, seven.

If two or more players draw an equally high card, only they draw again. The cards stay on the table so everyone can check them, and the game asks: Continue? Yes starts the game, No takes you back to Solaro Games.

Dealing

The dealer gives every player eight cards in three rounds: three, two and three. The deal passes clockwise after every hand. The player to the left of the dealer is voorhand.

Choosing trump

Voorhand chooses the trump suit. This room plays verplicht spelen: voorhand must choose, there is no passing. The team of voorhand is the playing team (the players) for this hand.

Kraken

When trump is known, the defending team may double the hand, then the players may double again, and the defenders once more. See the chapter on kraken.

Announcing roem in hand

Before the first card is played every player announces the runs in his hand. A window shows who had which roem, the top cards and who wins. See the chapter on roem.

Eight tricks

Voorhand leads the first trick. Whoever wins a trick leads the next one. The winner of a trick takes the four cards and lays them face down to his right.

Score and the next hand

After the eighth trick the hand is scored and written on the score sheet. Then the next player deals. The game ends after the hand in which a team reaches the target: 1500 for members and VIPs, 500 for guests. The team with the most points wins; when both have the same total, the team that scored more in the last hand wins.

5Playing a trick — the Amsterdam rules

Verzaken is impossible here: the game only accepts a card you may play. When it is your turn, the cards you may play stand up in your hand with a gold edge, and the others sink and turn grey. Click a grey card and it shakes, and the message line tells you which rule applies. These are the rules it follows.

1. Follow suit. If you have a card of the suit that was led, you must play one.
2. Trump led: go over. When trump is led you must play a higher trump than the highest trump in the trick, if you have one. If you cannot, you play a lower trump.
3. Partner holds the trick: free. If you cannot follow suit and your partner is winning the trick, you may play any card. This is the Amsterdam rule: you do not have to trump your partner.
4. Opponent holds the trick: trump. If you cannot follow suit and an opponent is winning the trick, you must trump. If a trump is already in the trick, you must go over it if you can.
5. No undertrumping. If you cannot go over the trump in the trick, you may not play a lower trump while you still have a card of another suit. Only with nothing but lower trumps do you undertrump.
6. No trump? If you cannot follow suit and have no trump, you may play any card.

6Roem

Roem are bonus points for combinations. Roem counts for the team, together with the card points, both for winning the hand and in the score.

Roem on the table (in a trick)

When a trick is complete, its four cards are checked. The team that wins the trick scores the roem in it.

The stuk always adds 20 on top of a run: on its own 20, with the jack of trump 40, in a run of four 70. A run of four is not also counted as two runs of three. Four sevens, eights or nines are worth nothing.

Stuk in hand

A player who holds both the king and the queen of trump has the stuk in hand. His team scores 20 roem as soon as he has played both cards, whoever wins those tricks. The game announces it at that moment.

The stuk is never counted in the announcement before the first card, also not when the king and queen of trump are part of an announced run. A run of jack, queen and king of trump is announced as 20; the stuk adds 20 more once you have played both the queen and the king, so together 40. This holds whichever team wins the announcement.

Roem in hand (announced before the first card)

Before the first card every player announces the roem in his own hand. The stuk is not part of the announcement: it counts only when played.

A card can count twice: a jack in a run of three also counts in four jacks.

• The highest announcement wins. If two are equal, the one with the highest top card of a run wins. If that is equal too, the first player clockwise from voorhand wins.
• The team of the winner scores the roem in hand of both partners. The roem in hand of the other team counts nothing.
• The window shows this even when only one player has roem, so you always know what was announced.

Pit

A team that wins all eight tricks makes a pit (mars) and scores 100 extra roem. At a pit everything goes to that team: all 162 points, its own roem, the 100 for the pit, and also the roem of the other team (for example its roem in hand or its stuk). The other team scores nothing.

7Scoring

1. Each team adds up the points in its tricks, with 10 for the last trick: together always 162.
2. Each team adds its roem: table roem, stuk, roem in hand and pit.
3. The playing team must have more than the other team, points and roem together. Equal is not enough.
4. If they do, both teams score what they made. If they do not, the players go nat: they score nothing and the other team scores 162 plus all the roem of both teams.
5. Finally the multipliers: kraken doubles the hand, rekraken four times, superkraken eight times. With spades as trump the whole hand counts double on top of that (schoppen dubbel).

8Kraken

Kraken is a bet that the players will go nat. It raises the stakes of the whole hand, for both teams.

With spades as trump the multiplier is doubled once more.

When to kraken: only with a strong trump holding behind the players, such as the jack or the nine of trump with at least two more trumps, and a side ace. A lost kraak costs twice as much, so kraken pays only when you expect them to go nat at least one time in three.

The computer players kraken the same careful way: they need the jack or nine of trump, at least three trumps and a side ace, and their simulations must show the players going nat more often than not.

9Signals (seinen)

When your partner holds the trick and you cannot follow suit, you may play any card. Experienced players use that card as a message to their partner. These are the common Dutch conventions.

Only the first such card in a suit counts as a signal.

10Tips and tactics

These are the principles of good play. The computer players follow all of them as fixed rules.

Choosing trump

• Choose the suit with the jack and the nine of trump if you can: together they are the two highest cards of the hand.
• Count your trumps: three or more with the jack or the nine is a solid start. Side aces are worth a trick each.
• Remember schoppen dubbel: a good spade hand counts twice, and so does a bad one.

Playing

• Who plays pulls trump: when your team plays and you hold the jack of trump, lead trump so the opponents lose their trumps before they can use them.
• Never lead trump when nobody else can have trump left: that trump can only be thrown away.
• Never lead a ten while the ace of that suit is still out: the ace takes the ten. Play the ace first, or wait.
• Never put a ten on a trick while the ace of that suit can still come after you.
• Do not trump your partner's trick when you do not need to. Only trump when an opponent after you could still take the trick.
• Do not throw an ace away on a suit you cannot follow: later it is a trick of its own.
• Do not put an ace or a ten on a trick that an opponent after you will trump.
• Smear points (an ace or a ten) on your partner's trick only when nobody after you can take it.
• Count the trumps: there are eight. Once you know where the last ones are, your side aces are safe.
• Watch for roem: on a trick your partner holds a card that makes roem is welcome; on a trick the opponents hold it is a gift.
• The last trick is worth 10 extra: keep a winner for the end when you can.

11The computer players

Cheng Yi and the two Teslas think the way a strong player does. They remember every card that has been played and who could not follow which suit. Then they imagine many possible deals of the cards they cannot see, all fitting what they know, and play every possible move out in each of those deals. They choose the move that does best on average.

Before those simulations, moves that a good player never makes are removed by fixed rules: the mistakes listed under tips and tactics.

For trump they compare the four suits over many deals and prefer the suit with the jack and the nine. For kraken they combine their simulations with a model learned from thousands of played hands, and they only kraken with a strong hand.

They also behave like players at a real table. They look at the game — their cards, the trick, the player whose turn it is, now and then at you — and not around the room. They sit back while they wait, lean forward when it is their turn, and now and then shift their weight. Their fingers rest on the back of the fan they hold, the thumb on its front, never through the cards. A card is played by light: the free hand lights up, a soft beam lifts the card out of the fan and carries it to its place on the table, where it settles with a small pulse. The winner of a trick gathers the four cards the same way and beams them to their corner. Each player has their own colour: Tesla Mars crimson and gold, Cheng Yi jade and gold, Tesla Volt blue and silver, and you warm gold. No hand or finger goes into the table. They sit calmly and naturally: no cheering, no gloom and no gestures, only a glance now and then and a small shift in the chair. The dealer shuffles the deck between both hands before dealing. These movements are motion capture from Mixamo, fitted to each player's own body; the hands are still placed exactly on the cards by the game itself.

They think in a separate thread in your browser, so the room keeps moving. If they ever fail to answer in time, a safe decision is taken and the game goes on.

The Tip button asks the same engine what it would play in your place. The Tip is available to members and VIPs.

Every finished hand is recorded anonymously, without your name or address, to measure and improve the computer players.

12Game length and scoreboard

The monthly scoreboard

The scoreboard shows the top 10 of this month: your best finished game to 1500, with your name and Cheng Yi. The best score of your team counts first, then the difference with the Teslas. Only your best game of the month is kept. Every month starts with an empty board; the board of Tesla's Ascent works the same way.

VIP login

Solaro Games can give you a VIP name. Press VIP login, enter that name, and you play the full game to 1500 and appear on the scoreboard as VIP with your name, without an account.

A VIP login counts only in this room: it makes you a member here, not elsewhere on the site. It holds for one session: when you close the browser, use another device or another internet connection, or after 12 hours, you log in with your VIP name again. Logging out with the cross next to your VIP name ends it at once. Solaro Games can also end a VIP name at any time.

13Using the room

The room is made for a laptop, a desktop computer or a tablet from 2019 or later. A phone, or an older or less powerful device, sees a short notice instead of the room, with the film of the card room and a way back to Solaro Games.

The buttons run along the bottom of the room; the message line, your choices and the Tip stand just above them.

A film shows the whole room: the club, a real hand from the draw to pit, and every feature. It plays from the clapperboard beside Tesla's klaverjassen in the Games menu.

The room is lit by what you see. The lamp over the table throws a soft cone of light with dust drifting in it, the sconces glow and flicker a little, gold LED lines run along the walls and the cove, the live screens light the wall round their frame in their own colour (green when the price rises, red when it falls), and a gold inlay glows round the felt. A soft bloom makes only the light sources glow, never the cards, the players or your hands, so the cards stay sharp under every light. If your computer struggles, the room switches the bloom off by itself before it lowers the sharpness.

Looking and playing

• Drag to look around the room. Scroll with the mouse wheel to lean in over the table.
• Click or tap a card with a gold edge to play it: your right hand lights up and beams it to the table. A grey card may not be played now: clicking it tells you why.
• The bar next to the score always shows trump, who plays, the tricks and the points of this hand; on the left, under the Solaro button, you see the target and the hand number.
• If you reload the page, you can continue your game with the score so far. The hand that was in progress is dealt again.

Credits

Your hands: First Person hands rigged by DavidFischer, CC BY 4.0.

The tarot cards: illustrations made for Lumazel in the style of the Tarot de Marseille (generated with OpenAI gpt-image-2); frames, pips and indices drawn by the room.

Body language of the computer players: motion capture from Mixamo (Adobe), fitted to each player in the browser.

The room's materials are scans of real surfaces from Poly Haven (CC0): herringbone parquet, wooden panels, lacquered cherry, red and brown leather, floral jacquard, stretch poplin and carpet, with the Fireplace lounge for the reflections.

Music: Rock, Funky, Jazz, Jazzrock and Pop by Kevin MacLeod (incompetech.com, CC BY 3.0); Baroque Piano: J.S. Bach, the Open Goldberg Variations by Kimiko Ishizaka (CC0); Baroque Organ: J.S. Bach organ works, recordings on Wikimedia Commons (CC BY); Klassiek: Paul De Bra's accordion orchestra (CC BY 4.0); Natural: field recordings from Freesound (CC0).

DavidFischer on Sketchfab · incompetech.com · All music credits · polyhaven.com

14Glossary

Klaverjassen has its own Dutch words. They are used in the room in every language.

Troef

Trump: the suit that beats all other suits in this hand.

Voorhand

The player left of the dealer, who chooses trump and leads the first trick.

Verplicht spelen

Voorhand must choose trump and may not pass.

Wij / Zij

Us and them: your team and the Teslas on the score sheet.

Maat

Your partner.

Slag

A trick: the four cards played in one round.

Roem

Bonus points for combinations of cards.

Stuk

The king and queen of trump: 20 roem, in one hand or in one trick.

Nat

The playing team did not score more than the other team: it scores nothing.

Pit

All eight tricks for one team: 100 extra roem, and all points and all roem of the hand go to that team.

Kraken, rekraken, superkraken

Doubling the hand, doubling again and once more.

Schoppen dubbel

With spades as trump the whole hand counts double.

Amsterdams

The Amsterdam rules: you never have to trump your partner's trick.

Overtroeven

Playing a higher trump than the one in the trick.

Ondertroeven

Playing a lower trump than the one in the trick: only allowed when you have nothing else.

Seinen

Signals: telling your partner something with the card you choose to throw.

Smeren

Putting points (an ace or a ten) on your partner's trick.

Kleintje boer

Voorhand leads a low card of another suit to say: I have the jack of trump.

B, V, H, A

Jack (boer), queen (vrouw), king (heer), ace (aas).

15What changed

Every change to the game is listed here, newest first, and the chapters above always describe the game as it is now.

• 2.321.0 · 2026-10-28The card room now opens on laptops, desktop computers and tablets from 2019 onwards. On a phone or an older device you see a short notice instead, with the room's film and a way back to Lumazel.
• 2.320.4 · 2026-10-28A film about the card room: in the Games menu a clapperboard beside Tesla's klaverjassen plays it — the club, a real hand from the draw to pit, and everything the room offers.
• 2.320.3 · 2026-10-27The brass card rests fit their cards exactly: a leaning card lies on its rest and nothing of the rest pokes through it.
• 2.320.2 · 2026-10-27The VIP login button is now gold, with a pulsing glow and a shimmer that sweeps across it.
• 2.320.1 · 2026-10-27Your own card on the table now leans towards you on a brass card rest as well, like east's and west's, and so do the cards of the draw for the lead.
• 2.320.0 · 2026-10-27Cards easier to tell apart: a four-colour deck (klaveren green, ruiten blue, harten red, schoppen black), a gold rim on every trump card, and a golden pool of light under the card that is winning the trick. The cards of all three other players now lean towards you on brass card rests, north's a little more.
• 2.319.4 · 2026-10-27Roem in hand: five or more in a row now counts 100, four jacks 200, and four queens, four kings or four aces 100.
• 2.319.3 · 2026-10-27North's card, the furthest from you, now leans towards you on a slim brass card rest, so it reads as easily as the others. Every card — in your hand or on the table — is lit from its own upper left, so the relief on the table looks exactly like the relief in your hand.
• 2.319.2 · 2026-10-27The cards on the table have a much stronger relief: a grazing light skims across them, so every pip, number and letter stands up clearly.
• 2.319.1 · 2026-10-27Stronger relief on the cards: the pips, numbers and letters stand up more clearly under each card's spot.
• 2.319.0 · 2026-10-27Every card has its own spot: a warm light raking in from the upper left brings out the relief of the pips, numbers and letters, printed like embossing, so every card reads at a glance. Cards on the table lie in a soft pool of light.
• 2.318.3 · 2026-10-27Super smooth on every screen: the room now draws every frame your screen shows — 60, 120 or 144 per second — with every player, card and hand placed smoothly between the game's steady steps.
• 2.318.2 · 2026-10-27The players move the same on every screen and in every browser: the game now runs in fixed steps of 1/60 second, so a 120 Hz screen (Chrome, Edge) or an uneven frame rate no longer makes the arms and the hands holding the cards restless.
• 2.318.1 · 2026-10-27Only the light sources glow — the lamp, the LED lines, the sconces, the inlay and the screens — so the cards on the table stay razor sharp under every light, and nothing flickers on the players' arms in any browser. The dust in the lamp's light floats above the table, away from the hands.
• 2.318.0 · 2026-10-27Light and glow in the card room: a new card-table lamp with a brass louvre and a glowing rim, a soft cone of light with drifting dust over the table, glowing and flickering sconces, light washing up the walls, gold LED lines, neon light round the live screens in their own colour, a glowing gold inlay round the felt and a soft bloom on every light source.
• 2.317.6 · 2026-10-27Your cards sit further to the right in your hand, rising out of it, and nothing of your hand ever goes through a card: the hand stays behind the cards with only the thumb in front, checked every frame before it is drawn — also while cards are dealt and after every play.
• 2.317.5 · 2026-10-27Your left hand is a real left hand holding the cards: the palm towards you, the thumb on the left lying lightly over the front of the lower cards and never through them, the fingers resting on the back of the fan and a straight wrist. Your fan now turns round a point just below the cards, as in a real hand.
• 2.317.4 · 2026-10-27Your left hand holds your cards the way Cheng Yi holds hers: the fan rises out of a closed hand, the fingers curled behind the cards and the thumb lying up the front of the fan's lower middle.
• 2.317.3 · 2026-10-27The computer players sit calmly and naturally: no more cheering, gloom, applause or other gestures, only a glance now and then and a small shift in the chair. The dealer still shuffles before dealing.
• 2.317.2 · 2026-10-27The cards in your hand are larger and further apart, so every corner index is easy to read. Your left hand holds the fan like a real card player: the fingers run up behind the cards and the thumb comes up from below and lies lightly over the front of the lower cards. North's card, the farthest from you, lies a fifth larger on the table.
• 2.317.1 · 2026-10-26The cards on the table are larger and sharper, with a little more room between them, and your left hand holds the fan in a relaxed, natural way: fingers behind the cards, the thumb over the front.
• 2.317.0 · 2026-10-26Tarot cards: the whole deck in the style of the Tarot de Marseille — pages, queens and kings on their thrones, aces held up from a cloud, a sun-and-moons back — with large corner indices and a name ribbon, so they still play as klaverjas cards.
• 2.316.1 · 2026-10-26At a pit everything goes to the pit team, the other team's roem included. Smoother players: calm fingers on the fan, a gentle return after beaming, no sudden turns of the hand; after shuffling the deck lies under the dealer's hands and is dealt from there. Full screen stays smooth on large screens.
• 2.316.0 · 2026-10-26Cards move by light: the playing hand lights up and a soft beam carries the card from the fan to the table, and the winner of a trick beams the four cards to their corner — in each player's colour, also for you. The hands holding a fan now keep their fingers on its back and the thumb on its front, never through the cards.
• 2.315.1 · 2026-10-26Calmer and more natural players: they look at the game instead of around the room, sit back while waiting, lean forward on their turn and shift their weight now and then; cards are really taken between thumb and index finger (also by your own hand); hands and fingers stay on top of the table.
• 2.315.0 · 2026-10-26Living players: natural hands and arms (fingers that curl like real ones, a pinch grip for a card, human speed and curved paths, an elbow that swings with the reach, a resting hand that breathes and taps), and motion-captured body language — the computer players react to big tricks, pit, nat and the end of the game, fidget while waiting, and the dealer shuffles the deck before dealing.
• 2.314.5 · 2026-10-26The buttons now run along the bottom of the room, spread over its full width; the cards on the table, the message line and the Tip stand just above them, and the language menu opens upward.
• 2.314.4 · 2026-10-26The stuk counts only when played, never in the announcement of roem in hand: jack, queen and king of trump are announced as 20, and the stuk adds 20 once the queen and king have both been played.
• 2.314.3 · 2026-10-26The target and hand number now sit on the left, under the Lumazel button.
• 2.314.2 · 2026-10-26The stuk counts in roem in hand: jack, queen and king of trump announced before the first card is 40, a run of four with them 70. It is not counted again when the cards are played; if the other team wins the announcement, the stuk still counts when played. The trump bar now sits in the top row next to the score, with the target and hand number below the buttons. Every question and window of the game has the game's own style (no more browser pop-ups). And your arms wear a short T-shirt sleeve when you look around.
• 2.314.1 · 2026-10-26A VIP login now holds for one session only: closing the browser, another device or another internet connection, or 12 hours, and you log in with your VIP name again.
• 2.314.0 · 2026-10-26Real materials in the card room: every surface is now a scan of the real thing — herringbone oak parquet, raised walnut panelling, lacquered cherry for the table and chairs, oxblood leather on the chairs, brown leather on the table rail, emerald jacquard on the walls, a fine weave under the baize and pile in the rug — and the lacquer, leather and gilt reflect a warm, lamp-lit lounge.
• 2.313.0 · 2026-10-26The card room rebuilt as a private card club: a light oak floor with a hexagonal rug, walnut panelling and emerald damask, gilt-framed screens between brass wall lights, an ivory coffered ceiling with a rosette and a warm cove light, and Chesterfield card chairs in oxblood leather. The cards you may play now stand up with a gold edge, the others turn grey, and a click on a grey card tells you the rule that applies.
• 2.312.1 · 2026-10-26VIP names are now VIP members of Lumazel, managed in user management, for every place that offers a VIP login. Here a VIP login makes you a member only in this room, and logging out here ends it here.
• 2.312.0 · 2026-10-26The handbook: every rule, the course of a game, signals, tactics and how the computer plays, in chapters. Choose your language in the room. Before the first hand everyone draws a card; the highest leads, and you confirm with Continue? VIP login: a name from Lumazel lets you play to 1500 and appear on the scoreboard without an account. A game survives a reload or a language switch.
• 2.311.10 · 2026-10-26A full-screen button and a button back to Lumazel.
• 2.311.9 · 2026-10-26The stuk also counts on the table: the trump king and queen in one trick add 20 roem (jack, queen and king of trump together 40). Roem in hand is announced in a window that shows every player's roem, the top cards and the winner. Guests and non-members play to 500, members to 1500, with a monthly scoreboard; the Tesla's Ascent board is monthly too.
• 2.311.8 · 2026-10-26The computer no longer trumps its partner's trick when that is not needed; it only does so when an opponent still to play could take the trick.
• 2.311.7 · 2026-10-26The Teslas' wizard outfits fitted exactly: the hat on the helmet, blinking digital eyes, the cloak over the shoulders and the chair.
• 2.311.6 · 2026-10-26Fixed: the computer players could hang while choosing trump. There is now a safety net that always lets the game go on.
• 2.311.5 · 2026-10-25The table rules of the house: stuk in one hand counts 20, spades as trump count double, roem in hand is declared before the first card (three in a row 20, four or more 50), the last trick is worth 10. The computer prefers trump in the suit with the jack and the nine, pulls trumps when its team plays and it holds the jack, and never leads a 10 into an ace that is still out.
• 2.311.4 · 2026-10-25Steady hands for the players holding cards, ten music stations with their own volume, and the computer never plays a 10 while the ace of that suit may still come over it.
• 2.311.3 · 2026-10-25The computer players hold their cards like you do and lay them on the table by hand; larger, sharper cards on the table.
• 2.311.2 · 2026-10-25Back to the solid base engine, with roem and careful kraken on top, and hard rules against the classic mistakes: no trump lead when nobody else has trump, no ace thrown away, no ace or 10 onto a trick an opponent will trump. Signals switched off: they caused moves a good player never makes.
• 2.311.1 · 2026-10-25Bitcoin ahead, Ethereum left, Solana right; the cards on the table larger and readable; kraken much more careful.
• 2.311.0 · 2026-10-25Tesla's klaverjassen opens: a 3D card room, you south, Cheng Yi north, two Tesla robots west and east.
• 2.310.0 · 2026-10-25A stronger computer player: roem on the table counts in its play, and superkraken (×8) added.
• 2.309.0 · 2026-10-25The rules engine: Amsterdams, verplicht spelen, roem, stuk, nat, pit, kraken, to 1500.