Klaverjassen

KLAVERJASSEN: THE ULTIMATE GAME MANUAL & COMPREHENSIVE GUIDE

1. Game Overview & Core Premise

Klaverjassen (often simply referred to as Klaverjas) is one of the most beloved, strategic, and culturally significant trick-taking card games in the Netherlands. Rooted in a rich European tradition that shares lineage with games like Belote, Jass, and Skat, Klaverjassen is a four-player trick-taking game played with two competing partnerships of two players each. Partners sit opposite each other across a standard table.

Played with a stripped 32-card deck (often called a "Piquet deck," containing cards from 7 through Ace), Klaverjassen demands a blend of memory, tactical execution, seamless partner communication, and risk management. Unlike simple trick-taking games like Whist or Hearts, Klaverjassen features dynamic card rankings that dramatically shift depending on which suit becomes the Trump Suit (Troef) for the round, as well as a specialized bonus point system known as Mélange (Roem).

Whether played casually in traditional Dutch brown cafés (bruine kroegen) or competitively in structured tournaments, Klaverjassen delivers an intellectually stimulating, highly social, and deeply rewarding strategic card experience.

---

2. Key Game Features & Cultural Legacy

• Rich Dutch Heritage: Experience the definitive digital adaptation of the Netherlands' national card game, complete with traditional terminology, regional rule variants, and authentic card deck artwork.
• Dynamic Partnership Mechanics: Victory relies on non-verbal synergy with your teammate—reading their card leads, signaling trump strength, and sacrificing points to secure high-value tricks.
• Dual Rule Conventions (Amsterdam vs. Rotterdam): Play with both major traditional Dutch rule sets: the strict, forced-trump Amsterdam style or the aggressive compulsory-undertrick Rotterdam variant.
• Dynamic Card Hierarchy: Experience shifting card values where the Jack and Nine become supreme juggernauts when their suit is chosen as Trump.
• The "Roem" (Mélange) Bonus System: Score extra points by forming sequential runs, four-of-a-kind sets, or holding the King and Queen of Trumps (Klaverjas) during trick play.
• Multiple Game Modes: Engage in casual single rounds, competitive 16-trick match tournaments, offline AI training matches, or private online multiplayer tables with friends.
• Comprehensive Match Analytics: Track trick-by-trick histories, partner signaling accuracy, trump bidding win rates, and global ELO leaderboard ratings.

---

3. Deck Composition & Card Valuations

Klaverjassen uses a 32-card deck consisting of 7, 8, 9, 10, Jack, Queen, King, and Ace across the four standard suits: Clubs ($\clubsuit$), Diamonds ($\diamondsuit$), Hearts ($\heartsuit$), and Spades ($\spadesuit$).

The fundamental value and ranking of cards split into two distinct hierarchies based on whether a suit is Trump or Non-Trump (Plain Suit).

Non-Trump Suits (Plain Suits)

In any suit that is not the chosen Trump suit, the rank and point values are as follows:

Card Rank	Name	Point Value	Relative Strength
Ace	Aas	11 Points	Highest
Ten	Tien	10 Points	2nd Highest
King	Koning	4 Points	3rd Highest
Queen	Vrouw	3 Points	4th Highest
Jack	Boer	2 Points	5th Highest
Nine	Negen	0 Points	Low
Eight	Acht	0 Points	Low
Seven	Zeven	0 Points	Lowest

Total Plain Suit Points: 30 Points per suit (90 points total across 3 plain suits).

The Trump Suit (Troef)

When a suit becomes Trump, the Jack and Nine vault to the top of the hierarchy with massive point values:

Card Rank	Name	Point Value	Relative Strength
Jack	Boer / Het Stuk	20 Points	Supreme Highest
Nine	Negen / Nel	14 Points	2nd Highest
Ace	Aas	11 Points	3rd Highest
Ten	Tien	10 Points	4th Highest
King	Koning	4 Points	5th Highest
Queen	Vrouw	3 Points	6th Highest
Eight	Acht	0 Points	Low
Seven	Zeven	0 Points	Lowest

Total Trump Suit Points: 62 Points.

Card Value Sum: $90 \text{ (Plain)} + 62 \text{ (Trump)} = \mathbf{152 \text{ Points}}$. In addition, the team that captures the final (8th) trick receives a 10-Point Bonus (Laatste Slag), bringing the total base point pool for every round to exactly 162 Points (excluding bonus Roem).

---

4. Main Game Variants: Amsterdams vs. Rotterdams

Before dealing, players select one of the two standard Dutch rulesets governing how players must respond when an opponent plays a Trump card:

A. Amsterdams Style (Partner-Protection Rule)

• If an opponent leads a suit and your partner is currently winning the trick with the highest card, you are NOT forced to play a Trump card if you cannot follow the led suit. You may discard any plain suit card to save points for your team.
• If an opponent is winning the trick and you cannot follow suit, you must play a Trump card if you hold one (In troeven).
• Whenever you play a Trump, you must always play a higher Trump than any Trump currently on the table (Overttroeven), if possible.

B. Rotterdams Style (Strict Aggression Rule)

• You MUST always play a Trump card whenever you cannot follow the led suit, even if your partner is currently winning the trick!
• If you hold a Trump card, you can never discard a plain card when void in the led suit. You must overtrump if possible; if you cannot overtrump, you must still play a lower Trump (Ondertroeven).

---

5. How to Play Instructions

A full match of Klaverjassen consists of 16 rounds (deals). The dealing shifts clockwise after every round.

Phase 1: Dealing & The Bidding Round (Het Bieten)

1. The dealer shuffles and deals 8 cards to each of the 4 players (typically dealt in batches of 3-2-3 or 4-4).
2. The player to the left of the dealer acts as the First Bidder (Uitslover or Malker).
3. Starting with the first bidder, players decide whether to Pass or Choose Trump:
   • Mandatory Play (Uutraag): In standard rules, if all three initial players pass, the dealer must choose a Trump suit (Verplicht Spelen or Utrecht Style).
   • The Playing Team: The player who chooses the Trump suit locks their partnership in as the Makers (Attacking Team). The opposing partnership becomes the Defenders.
   • Goal: The Makers contract to win a majority of the total round points (at least 82 points out of 162 base points + any Roem scored).

Phase 2: Playing the Tricks

1. Leading the Trick: The player to the left of the dealer leads the first card to the table.
2. Following Suit (Bekennen):
   • Players must always follow the suit of the led card if they hold it in their hand.
   • If a player holds no cards in the led suit, they must follow the rule variant in effect (Amsterdams or Rotterdams) regarding trumping (Introeven) or discarding.
3. Winning the Trick:
   • The player who played the highest card in the led suit wins the trick, unless a Trump card was played.
   • If one or more Trumps were played, the player with the highest-ranking Trump card wins the trick.
4. The winner of the trick collects the 4 cards, places them face down in their team's trick pile, and leads the next card.

---

6. The "Roem" (Mélange) Bonus System

Roem consists of bonus points awarded for specific card combinations contained within a single trick. The points are awarded to the team that wins the trick containing the combination, regardless of who played the individual cards!

Valid Roem Combinations

• Three-in-a-Row (3 Consecutive Cards of Same Suit): 20 Points
  • Example: 8-9-10 of Hearts in one trick.
• Four-in-a-Row (4 Consecutive Cards of Same Suit): 50 Points
  • Example: 9-10-Jack-Queen of Spades in one trick.
• Four-of-a-Kind (Four Aces, Kings, Queens, or Tens): 100 Points
  • (Note: Four Jacks or Four Nines also score 100 points).
• Klaverjas (King and Queen of the Trump Suit): 20 Points
  • Special Rule: Holding both the King and Queen of Trumps scores 20 points the moment the second card of the pair is played to a trick.

Special Scoring Terms

• Nat / Bep doodgegaan (Going Wet): If the Makers fail to score more points than the Defenders (including Roem), the Makers score 0 points for the entire round. The Defenders receive all 162 base points PLUS all Roem scored by both teams!
• Pit / Mars (A Clean Sweep): If one partnership wins all 8 tricks in a single round, they earn a 100-Point Bonus (Pit), receiving a total score of 262 points plus all accrued Roem.

---

7. Expert Strategies & Pro Tips

To achieve high win rates in competitive Klaverjassen, implement these foundational tactical habits:

1. Count the Trumps Carefully:

   • There are exactly 8 Trump cards in the deck. Keep an accurate mental tally of how many Trumps have been played. Once all opposing Trumps are cleared, your team's high non-trump Aces and Tens become unbeatable trick winners.

2. Lead "Through" the Opposition:

   • If you are sitting to the right of the opponent who chose Trump, lead a plain suit through them to test their strength. Conversely, if sitting to their left, lead suits that force them to use high Trumps early.

3. Master Partner Signaling (Signaleren):

   • When discarding on a trick your partner is guaranteed to win, discard a low card in a suit where you hold the Ace or King. This signals to your partner which suit they should lead back to you on the next turn.

4. Protect the Jack and Nine of Trumps:

   • Never lead the Jack of Trumps on trick 1 unless you hold strong supporting cards. Use your low Trumps to draw out opposing cards before dropping the 20-point Jack (Het Stuk) or 14-point Nine (Nel).

---

8. Quick Reference Summary

Game Parameter	Specification
Genre	Trick-Taking Card Game, Partnership Strategy
Deck Size	32 Cards (7 through Ace)
Players	4 Players (2 Partnerships of 2)
Base Point Pool	162 Points per round (152 cards + 10 last trick)
Target Win Margin	Makers must score $\ge 82$ points to avoid going "Nat"
Match Length	Standard Match = 16 Deals (4 cycles around table)

Gather your partner, study the suit rankings, and master the Dutch classic Klaverjassen today!