Chess

Chess is the two-player abstract strategy game that’s been played essentially unchanged for over 500 years — and in earlier forms for over 1,500. The modern rules (queen has long-range diagonal+orthogonal movement, pawn first-move two squares, en passant, castling, stalemate as draw) crystallized in 15th-century Europe; tournament chess as we know it started in 1851 with the first international tournament in London. Today, online platforms host millions of chess games per day, and Magnus Carlsen-style streamers have made chess a cultural staple again.

How to play

• Setup: 8×8 board. Each player starts with 16 pieces: 8 pawns, 2 rooks, 2 knights, 2 bishops, 1 queen, 1 king.
• White moves first. Then alternating turns.
• Piece movement: rooks move along ranks/files; bishops along diagonals; queens combine both; knights move L-shape (2+1) and jump pieces; kings move one square in any direction; pawns move forward one (two on their first move) and capture diagonally.
• Goal: checkmate. Threaten the opponent’s king (check) such that no legal move escapes the threat.
• Special moves: castling (king-and-rook simultaneously, conditions apply), en passant (pawn captures pawn that just moved two squares), promotion (pawn reaching the last rank becomes a queen, rook, bishop, or knight).
• Draws: stalemate (no legal move but not in check), threefold repetition, 50-move rule (no capture or pawn move in 50 moves), insufficient material, mutual agreement.

Beginner strategy

• Control the centre. The four central squares (d4, e4, d5, e5) give pieces maximum reach. Develop your pawns and pieces toward them.
• Develop knights before bishops. Knights have fewer squares; bishops need pawn moves to open lines. Knights to f3/c3 and f6/c6 are standard openings.
• Don’t move the same piece twice in the opening. Every wasted tempo lets your opponent develop faster.
• Castle early. Your king is most vulnerable in the centre. Castle within the first 10 moves on most games.
• Don’t bring out your queen too early. An exposed queen gets harassed by minor pieces, losing tempo.
• Connect your rooks. After castling, develop your back rank — empty the squares between your rooks so they can support each other.

Piece value and trades

• Pawn = 1, Knight = 3, Bishop = 3, Rook = 5, Queen = 9. These are reference values for evaluating trades.
• Bishop pair = +0.5. Having both bishops is worth slightly more than the sum of their parts (they cover both color complexes).
• Don’t trade material when you’re up. If you’re +3 in material, trades simplify toward an easier endgame. If you’re down, complicate.
• Material vs position. Sometimes sacrificing a piece for positional advantage (open files, weak king, active pieces) is correct. Computers love sacrificial play; humans should be careful.

Intermediate strategy

• Open files for rooks. An open file (no pawns) is where rooks dominate. Maneuver to put rooks on open files; if no open file exists, work to create one.
• Outpost squares for knights. A knight on the 5th or 6th rank, protected by a pawn, that can’t be attacked by an opposing pawn = a permanent strongpoint.
• Pawn structure determines plans. Pawn chains direct your play. Isolated pawns are weak; doubled pawns are weak; passed pawns are dangerous.
• The minority attack. When you have fewer pawns on a side, push them to create weak squares in your opponent’s position.
• King safety in the middlegame. A king in the open is doomed once major pieces come off. Trade off attackers before going into the endgame with an exposed king.

Advanced strategy

• Prophylaxis. Before making your own plan, ask “what does my opponent want to do?” and prevent it. Karpov’s signature strategy.
• Calculation depth. Master-level players calculate 5-15 ply (half-moves) deep on critical lines. Each level beyond your opponent’s depth is decisive.
• Strategy vs tactics. Tactics is what you do; strategy is what you should do. “Tactics flow from a superior position” (Capablanca).
• Endgame technique. Master basic endgames — K+Q vs K, K+R vs K, K+P vs K (with theoretical wins/draws). Endgame errors are what cost most master games.
• The exchange sacrifice. Giving up a rook for a bishop or knight is a powerful positional weapon when it eliminates a key defender or opens lines.

Chess history milestones

• 6th century — Chaturanga (India): the ancestor of chess. Four armies, four pieces, similar layout.
• 15th century — modern queen: the queen gains its modern long-range power in Spain/Italy, transforming the pace of chess.
• 1851 — first international tournament: Adolf Anderssen wins the London tournament. Considered the start of modern competitive chess.
• 1886 — first World Champion: Wilhelm Steinitz vs Johannes Zukertort. Steinitz wins, holds the title until 1894.
• 1972 — Fischer-Spassky: American Bobby Fischer defeats Soviet Boris Spassky in Reykjavik. The most-watched chess match in history; a Cold War cultural event.
• 1997 — Deep Blue beats Kasparov: IBM’s chess computer wins a match against the reigning World Champion. The “humans are still better” era ends.
• 2018 — AlphaZero: DeepMind’s reinforcement-learning agent reaches superhuman level in 24 hours of self-play training. Fundamentally changes engine analysis.
• 2020 — Queen’s Gambit: the Netflix series triggers a chess boom; online chess platforms see 5-10x usage spikes.

Common mistakes

• Hanging pieces. Leaving pieces undefended where they can be captured. The #1 way to lose a game at every level.
• Premature attacks. Attacking the king before developing your pieces and securing your own king. Almost always backfires.
• Trading material when down. Trades simplify the position — good when you’re winning, bad when you’re losing.
• Pawn-grabbing. Capturing a pawn that turns out to be poisoned (defended in ways you missed). Common with the b-pawn.
• Playing too fast. Chess clocks exist for a reason. Most blunders happen in 5-second moves.

Variants worth knowing

• Chess960 (Fischer Random). Back-rank pieces shuffled randomly. Eliminates opening theory; tests pure chess understanding.
• Bullet chess (1 minute per side). Pure tactical speed.
• Blitz (3-5 minutes). Mix of tactics and strategy under time pressure.
• Rapid (15-30 min). Closer to classical strategy.
• Atomic Chess. Captures cause an “explosion” affecting all surrounding pieces.
• King of the Hill. Move your king to the centre 4 squares to win.

FAQ

• Q: How many possible chess games are there? A: Shannon estimated 10^120 — more than atoms in the observable universe. Even unique chess positions number around 10^43.
• Q: Can humans beat the best chess engines? A: No. Top engines (Stockfish, AlphaZero) play 700-1000 Elo points above the human world champion.
• Q: What’s the shortest possible checkmate? A: Fool’s Mate — 2 moves (g4, e5, f3, Qh4#). Requires the white player to play both opening moves catastrophically.
• Q: Is chess a draw with perfect play? A: Unknown. Most strong players believe so, but it’s never been proven. Computer analysis suggests white may have a small advantage.

For other 2-player strategy games, try Checkers, Connect Four, Backgammon, or Reversi 6×6.