Four Knights Game, Spanish Variation: Bb4

+37%
C491.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4
Feb 20, 2026
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TL;DR

A classical opening where both sides develop their knights symmetrically. The resulting positions are balanced but offer subtle strategic possibilities, particularly around the d4 and d5 squares.

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Four Knights Game, Spanish Variation: Bb4: A Complete Guide
Four Knights Game, Spanish Variation: Bb4 - Opening Moves
Summary

The Four Knights Game, Spanish Variation: Bb4 arises after 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 and falls under ECO code C49. With 2.7 million Lichess games across all rating levels, it is a specialized opening choice.

History and Notable Players

It arises from the Four Knights Game, Spanish Variation. Among the most prolific practitioners on the White side are Geza Maroczy (35 games), Dawid Markelowicz Janowski (32 games), Jose Raul Capablanca (27 games). On the Black side, notable exponents include Frank James Marshall (32 games), Richard Teichmann (22 games), Akiba Rubinstein (18 games).

Statistics

Based on 2.7 million Lichess games across all rating levels:

  • White wins: 49.8%
  • Black wins: 44.4%
  • Draws: 5.9%

White holds a moderate edge statistically, though Black has good practical chances.

Practice on Chessiverse

The best way to learn the Four Knights Game, Spanish Variation: Bb4 is through practice. On Chessiverse, you can play chess against computer opponents from any opening or custom position. Our AI bots range from beginner to grandmaster level, each with unique playing styles — from aggressive attackers to solid defenders. Choose a bot that matches your rating and work your way up as you master the opening's key ideas.

Quick Facts

Main Line1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4
FENr1bqk2r/pppp1ppp/2n2n2/1B2p3/1b2P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq - 6 5
DifficultyAdvanced
Style

Theoretician openings have deep, well-studied lines where knowledge of specific variations gives a significant advantage. Preparation and memorization of key lines are essential.

2,735,121games on Lichess
49.8%
5.9%
44.4%
White wins Draws Black wins

Top Players

Data from Lichess opening explorer (blitz & rapid)

Most Popular At400
SharpnessBalanced

Popularity by Rating

Percentage of all games at each rating bracket that feature this opening.

Data from Lichess opening explorer (blitz & rapid games)

Theory Adherence by Rating

How often players choose the single most popular move at this position. Higher = more predictable play.

White to move after the opening line

Popularity Over Time

Share of all Lichess blitz + rapid games featuring this opening, by year.

Top Moves by Rating

White to move after the opening line

RatingMost Popular2nd3rd
400Bxc633.9%O-O21.5%d318.1%
1000Bxc638.8%O-O19.7%d317.9%
1200Bxc637.5%d320.6%O-O19.4%
1400Bxc635%d324.6%O-O19.7%
1600Bxc632.2%d330.2%O-O21.4%
1800d334.7%O-O29.1%Bxc626%
2000O-O47.4%d329.8%Bxc616.4%
2200O-O70.4%d315.1%Bxc69.3%
2500O-O83.3%Bxc67.5%d34.8%

Popularity by Time Control

Bullet
0.04%1.0M
Blitz
0.05%1.8M
Rapid
0.09%947K
3% more decisive in bullet
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Frequently Asked Questions

What is the Four Knights Game, Spanish Variation: Bb4?

The Four Knights Game, Spanish Variation: Bb4 begins with 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 and is classified under ECO code C49.

Is the Four Knights Game, Spanish Variation: Bb4 good for beginners?

The Four Knights Game, Spanish Variation: Bb4 can be played at any level. Beginners should focus on understanding the key strategic ideas rather than memorizing long theoretical lines. Our AI bots at various rating levels provide a great way to practice the opening concepts.

What are the win rates for the Four Knights Game, Spanish Variation: Bb4?

Across 2.7 million Lichess games, White wins 49.8% of the time, Black wins 44.4%, and 5.9% are drawn. Notable master practitioners on the White side include Geza Maroczy and Dawid Markelowicz Janowski. On the Black side, Frank James Marshall and Richard Teichmann are among the most frequent practitioners.

How can I practice the Four Knights Game, Spanish Variation: Bb4?

On Chessiverse, you can practice the Four Knights Game, Spanish Variation: Bb4 by playing against our 600+ AI bots. Each bot has a unique playing style and opening repertoire, so you can find the perfect sparring partner for any level.

Written by

Chessiverse
Chessiverse TeamOpening Guides

Expert chess content backed by opening theory and our database of 600+ AI bots with unique playing styles and opening repertoires.

Practice This Opening on Chessiverse

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