Learn chess openings on the board.

The Sicilian (1.e4 c5) is the most popular fighting answer to 1.e4 at every level, and the opening where memorized fragments fail fastest. Chessmate separates White and Black courses for the Closed Sicilian, Alapin, Smith-Morra, Najdorf, Dragon, Classical, Sveshnikov, Accelerated Dragon, Taimanov, Kan, and Scheveningen systems.

The French Defense (1.e4 e6) gives Black a solid structure and clear pawn-chain plans. These Black courses cover every major White try: the Exchange, the Advance, the Tarrasch, and the critical 3.Nc3 main lines.

The Italian Game (1.e4 e5 2.Nf3 Nc6 3.Bc4) is the most common open game in online chess. It is easy to reach and easy to misplay. Chessmate teaches it from both colors: White's main plans, White theory for the Two Knights and Italian Four Knights, and a Black repertoire for meeting the Two Knights with confidence.

The Ruy Lopez (1.e4 e5 2.Nf3 Nc6 3.Bb5) has been the main battleground of open games for over a century, and White players tend to know it well. These Black courses give you dependable theory against it: the Berlin, the Closed main lines, the Marshall Attack, and the tricky sidelines White uses to dodge all of that.

The Queen's Gambit (1.d4 d5 2.c4) is White's most classical bid for a lasting opening advantage: the c-pawn challenges Black's grip on the center from move two. Chessmate's courses build a White repertoire against both main replies: capturing on c4 in the Accepted, and holding the center with 2...e6 in the Declined.

Opening traps are short tactical branches that work only after a specific mistake. Chessmate separates them by side: the White course trains punishments against loose kings and greedy captures, while the Black course covers mating patterns, deflections, and piece-winning traps. Each line teaches the trigger as well as the finish.

Alekhine's Defense (1.e4 Nf6) invites White's pawns forward so Black can undermine them later. This Black course teaches when the pawn chase is wrong and how to prove it.

The Benko Gambit (1.d4 Nf6 2.c4 c5 3.d5 b5) trades a pawn for long-term queenside pressure that lasts deep into the endgame. This Black course covers the accepted main lines and White's declining tries.

The Benoni (1.d4 Nf6 2.c4 c5 3.d5 e6) creates an unbalanced pawn structure where Black plays for active piece play against White's center. This Black course teaches the Modern Benoni plans and the move orders that make them work.

The Caro-Kann (1.e4 c6) is the solid classical answer to 1.e4: Black supports ...d5 while keeping the light-squared bishop free. The course gives you a dependable Black repertoire built on sound structure and manageable theory.

The Four Knights (1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6) looks quiet but hides real theory, from the Spanish Four Knights to the aggressive Italian setups. This Black course covers the lines that actually appear in online play.

The King's Indian Defense begins with a compact kingside setup against White's broad pawn center. Black usually develops with ...Nf6, ...g6, ...Bg7, ...d6, and ...O-O before challenging the center with ...e5 or ...c5. The Chessmate course covers the main structures and the plans that change when White chooses the Classical, Sämisch, Four Pawns, Averbakh, or Fianchetto setup.

The London System develops White's dark-squared bishop before closing it behind e3. The familiar Bf4, e3, Nf3, c3, Nbd2, and Bd3 setup is only the starting point. The Chessmate course teaches when to keep that structure and when Black's early ...c5, ...Qb6, ...Bf5, or ...g6 calls for a different plan.

The Petroff (1.e4 e5 2.Nf3 Nf6) neutralizes White's initiative by counterattacking the e-pawn immediately. The course teaches the key equalizing lines and the traps White hopes you don't know.

The Queen's Indian (1.d4 Nf6 2.c4 e6 3.Nf3 b6) is Black's flexible answer when White avoids the Nimzo-Indian: pieces control e4 while the pawn structure stays fluid. This Black course covers the main fianchetto and 4.a3 battlegrounds.

The Scandinavian Defense answers 1.e4 with 1...d5 and challenges White's center immediately. This Chessmate course follows the 2.exd5 Qxd5 3.Nc3 Qa5 repertoire for Black, then shows how the same ...c6, ...Bf5, and ...e6 setup changes against early Bc4, d4, c4, and gambit tries.

The Scotch (1.e4 e5 2.Nf3 Nc6 3.d4) opens the center early and forces Black to know concrete theory from move three. This Black course gives you a reliable path through the main lines and the gambit tries.

The Slav Defense begins with 1.d4 d5 2.c4 c6. Black supports d5 without blocking the c8-bishop, then decides whether to capture on c4 or keep the center intact. The Chessmate course is a White repertoire for recovering the c4-pawn, challenging the active bishop, and meeting the Exchange, Quiet, and Chebanenko structures.

The Vienna (1.e4 e5 2.Nc3) delays Nf3 to keep f2-f4 ideas on the board, and unprepared Black players walk into its gambits constantly. This Black course teaches the antidotes, including against the related Bishop's Opening move orders.