Overview
King’s Knight Opening Jobs in Esil, Akmola Region, Kazakhstan at Chessiverse AB
Title: King’s Knight Opening
Company: Chessiverse AB
Location: Esil, Akmola Region, Kazakhstan
Articles/Opening Guides/King's Knight Opening
King's Knight Opening
C401.e4 e5 2.Nf3
Updated Mar 27, 2026
3 min read
Play this opening as…
♔ White♚ Black
TL;DR
The King's Knight Opening, 1.e4 e5 2.Nf3, is the most natural second move in chess — developing a piece while attacking e5. From here the game branches into the Ruy Lopez, Italian, Scotch, Four Knights, Petroff, and Philidor — every great Open Game system.
Reviewed by
IM John BartholomewCo-Founder & Chess Educator
International Master and chess educator. Co-founded Chessable and joined Chessiverse as co-founder. Best known for his "Climbing the Rating Ladder" YouTube series and structured opening courses.
In This Article
- History and Notable Players
- Statistics
- Main Lines and Variations
- Practice on Chessiverse
- Performance Across Rating Levels
- Time Control Patterns
- Move Diversity and Theory Depth
- Historical Trends
Summary
The King's Knight Opening arises after 1.e4 e5 2.Nf3 and falls under ECO code C40. This is the single most common opening move sequence in chess. White places a piece on an active square, strengthens control of the center and d4 in particular, and puts immediate pressure on Black's e5-pawn. Black must decide whether to defend the pawn or launch a counter-attack. The overwhelming favorite is 2…Nc6, which develops a piece while simultaneously protecting e5 and contesting d4, making it roughly five times more popular than all alternatives combined. From here, the game branches into many of chess's most celebrated openings: 3. Bb5 enters the Spanish (Ruy Lopez), 3. Bc4 the Italian, and 3. d4 the Scotch. With 816 million Lichess games across all rating levels, it is one of the most popular openings.
History and Notable Players
It arises from the Open Games (1…e5). Among the most prolific practitioners on the White side are Viswanathan Anand (617 games), Sergey Karjakin (428 games), Alexei Shirov (416 games). On the Black side, notable exponents include Ivan Sokolov (487 games), Levon Aronian (483 games), Oleg M Romanishin (456 games).
Statistics
Based on 816 million Lichess games across all rating levels:
- White wins: 51.1%
- Black wins: 44.6%
- Draws: 4.3%
White holds a moderate edge statistically, though Black has good practical chances.
Main Lines and Variations
After 1.e4 E5 2.Nf3, The Main Continuations Include
- Petrov Defense
- Philidor Defense
- King's Knight Opening: Nc6
Each of these lines leads to distinct types of positions and requires its own understanding of the resulting pawn structures and piece placements.
Practice on Chessiverse
The best way to learn the King's Knight Opening is through practice. On Chessiverse, you can play chess against computer opponents that specialize in this opening. 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.
Performance Across Rating Levels
The picture changes a lot as you climb the rating ladder. At 1200 Elo, the opening shows up in 23.36% of games (157,600,220 samples). White scores 51.4%, Black 44.7%, draws 3.9%. Move up to 1800 Elo and the share shifts to 12.47%, with White winning 50.8% versus Black's 44.6%. At the top end (2500+ Elo), popularity is 7.18% with 10.6% draws — a clear sign of how much theory rules the line at master level. White's edge erodes by 4.7pp from 1200 to 2500 Elo, suggesting Black's counterplay is easier to find with experience.
Time Control Patterns
Time control matters here: rapid players reach for this opening more than others. In bullet, it appears in 9.13% of games (242,824,295); White wins 50.8%. Blitz shows 15.74% adoption across 565,951,009 games, White scoring 50.9%. In rapid, the share rises to 22.60% — 250,098,442 games, White 51.5%.
Move Diversity and Theory Depth
What players actually play after the opening moves depends heavily on rating. At 1200 Elo, the top reply is Nc6, played 63% of the time. There are 3 other moves seeing meaningful share, and 89% of games stick to established theory. Entropy: 1.82. By 2500, Nc6 dominates at 81.5% of replies; only 2 viable alternatives remain and 97.2% of moves are theory. Entropy drops to 0.97. That entropy collapse is the signature of a line where preparation pays off: at the top, players know the best move and play it.
Historical Trends
Long-term, the trajectory of this opening is informative. Adoption peaked in 2021 at 17.95% (137,054,073 games). By 2025 it sits at 16.72% — a 6% shift overall, leaving the line flat.
Quick Facts
Main Line1.e4 e5 2.Nf3
FENrnbqkbnr/pppp1ppp/8/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq – 1 2
DifficultyEasy
Parent OpeningOpen Games (1…e5)
Style
Romantic openings prioritize piece activity, open lines, and direct attacks on the king over material considerations. They echo the swashbuckling style of 19th-century chess masters.
816,049,451games on Lichess
51.1%
4.3%
44.6%
White wins Draws Black wins
Top Players
As White
- Viswanathan Anand617 games
- Sergey Karjakin428 games
- Alexei Shirov416 games
As Black
- Ivan Sokolov487 games
- Levon Aronian483 games
- Oleg M Romanishin456 games
Data from Lichess opening explorer (blitz & rapid)
Most Popular At1000
SharpnessVery Sharp
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.
Black to move after the opening line
Popularity Over Time
Share of all Lichess blitz + rapid games featuring this opening, by year.
What do players play here?
Move preferences across rating brackets. Click a board to toggle its line.
- e4 e5 2.Nf3
After 1.e4 e5 2.Nf3
Black's second move in the Open Game
Nc6 increases from 50.4% at 400 to 81.4% at 2500
Nf6 decreases from 17.2% at 400 to 12.3% at 2500
d6 decreases from 11.6% at 400 to 3.4% at 2500
Top Moves by Rating
Black to move after the opening line
RatingMost Popular2nd3rd
400Nc651.4%Nf617.6%d611.9%
1000Nc660.2%d612.9%Nf612.9%
1200Nc663%d614.6%Nf611.4%
1400Nc663.6%d616.4%Nf610.9%
1600Nc664.2%d617.1%Nf610.7%
1800Nc666.4%d615.2%Nf611.1%
2000Nc670.5%Nf612%d610.7%
2200Nc676.8%Nf612.3%d65.9%
2500Nc681.5%Nf612.3%d63.4%
Popularity by Time Control
Bullet
9.1%242.8M
Blitz
15.7%566.0M
Rapid
22.6%250.1M
2% more decisive in bullet
Raw data tables (Lichess blitz + rapid)
King's Knight Opening: popularity and win rates by player rating Rating (Elo) Share % Games White win % Black win % Draw % Sharpness 400 21.14 48,690,437 51.8 43.7 4.5 0.955 1000 23.67 99,307,238 51.6 44.3 4.1 0.959 1200 23.36 157,600,220 51.4 44.7 3.9 0.961 1400 20.59 187,225,128 51.1 44.9 3.9 0.961 1600 16.52 163,880,166 51.1 44.7 4.2 0.958 1800 12.47 104,740,920 50.8 44.6 4.7 0.953 2000 9.19 41,648,809 49.9 44.7 5.4 0.946 2200 7.09 11,976,908 48.2 44.6 7.2 0.928 2500 7.18 979,625 46.7 42.7 10.6 0.894 King's Knight Opening: move-choice theory adherence by rating Rating (Elo) Top move Top move % Viable moves Theory % Entropy 400 Nc6 51.4 4 80.9 2.267 1000 Nc6 60.2 3 86.0 1.966 1200 Nc6 63.0 3 89.0 1.817 1400 Nc6 63.6 3 90.9 1.738 1600 Nc6 64.2 3 92.0 1.683 1800 Nc6 66.4 3 92.6 1.610 2000 Nc6 70.5 3 93.2 1.474 2200 Nc6 76.8 3 94.9 1.212 2500 Nc6 81.5 2 97.2 0.967 King's Knight Opening: popularity over time Year Share % Games White win % Black win % Draw % 2013 17.83 513,741 54.0 42.6 3.4 2014 16.14 1,456,729 53.3 42.9 3.8 2015 16.13 3,581,824 53.0 43.2 3.8 2016 17.13 10,559,248 52.7 43.3 4.0 2017 17.25 19,689,279 51.9 43.9 4.1 2018 17.07 31,919,289 51.5 44.3 4.1 2019 17.08 48,971,586 51.4 44.5 4.1 2020 17.60 100,960,864 51.5 44.0 4.5 2021 17.95 137,054,073 51.2 44.5 4.3 2022 17.35 128,308,307 51.0 44.8 4.2 2023 17.80 141,267,033 50.8 44.8 4.3 2024 17.15 128,025,688 50.8 44.9 4.3 2025 16.72 124,009,542 50.8 44.9 4.2 King's Knight Opening: popularity by time control Format Share % Games White win % Black win % Draw % Sharpness bullet 9.13 242,824,295 50.8 46.5 2.7 0.973 blitz 15.74 565,951,009 50.9 44.9 4.2 0.958 rapid 22.60 250,098,442 51.5 44.0 4.5 0.955 King's Knight Opening: top candidate moves by rating bracket Rating (Elo) 1st move 1st % 2nd move 2nd % 3rd move 3rd % 400 Nc6 51.4 Nf6 17.6 d6 11.9 1000 Nc6 60.2 d6 12.9 Nf6 12.9 1200 Nc6 63.0 d6 14.6 Nf6 11.4 1400 Nc6 63.6 d6 16.4 Nf6 10.9 1600 Nc6 64.2 d6 17.1 Nf6 10.7 1800 Nc6 66.4 d6 15.2 Nf6 11.1 2000 Nc6 70.5 Nf6 12.0 d6 10.7 2200 Nc6 76.8 Nf6 12.3 d6 5.9 2500 Nc6 81.5 Nf6 12.3 d6 3.4 King's Knight Opening: top practitioners by side Side Player Games White Viswanathan Anand 617 White Sergey Karjakin 428 White Alexei Shirov 416 Black Ivan Sokolov 487 Black Levon Aronian 483 Black Oleg M Romanishin 456
Play this opening as…
♔ White♚ Black
Training Recommendations
Targeted drills using our bots' unique playstyles to sharpen your skills in this opening.
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Getting Started in the King's Knight Opening
beginner
Hiro Bonsai, a defensive Guardian, simplifies the position to neutralize the initiative, while emma Castlewright is an aggressive Savage who thrives in tactical chaos. Practice at the beginner level to learn the patterns by playing them.
Hiro Bonsai(864)GuardianEmma Castlewright(873)Savage
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Learning the Patterns in the King's Knight Opening
novice
Penny Cillin is a defensive Observer who is hard to crack in complicated positions, while bez Bez, an attacking Savage, relishes deep complications. Practice at the novice level to solidify the basic plans.
Penny Cillin(1326)ObserverBez Bez(1283)Savage
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Sharpening Your Play in the King's Knight Opening
intermediate
Defensive Observer Pat Zuydaveld thrives when there is plenty to calculate, while whisk Wood attacks but doesn’t linger — an aggressive Hunter who simplifies on the right tempo. A solid step up when the textbook lines stop being enough.
Pat Zuydaveld(1890)ObserverWhisk Wood(1819)Hunter
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Testing Your Knowledge in the King's Knight Opening
skilled
Filê Rei, a defensive Guardian, simplifies the position to neutralize the initiative, while check Mateo is an aggressive Hunter who likes to cut play toward simpler positions. Practice at the skilled level to test your preparation under pressure.
Filê Rei(2137)GuardianCheck Mateo(2183)Hunter
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Master-Level Challenge in the King's Knight Opening
advanced
Defensive Observer Steve Repairman thrives when there is plenty to calculate, while bogo Ryhm attacks but doesn’t linger — an aggressive Hunter who simplifies on the right tempo. Practice at the advanced level to face master-strength resistance.
Steve Repairman(2508)ObserverBogo Ryhm(2316)Hunter
Frequently Asked Questions
What is the King's Knight Opening?
The King's Knight Opening begins with 1.e4 e5 2.Nf3 and is classified under ECO code C40. White develops a piece to a more active square, asserts control in the centre and over the d4 square, and attacks Black's e5-pawn.
Is the King's Knight Opening good for beginners?
The King's Knight Opening 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 main variations of the King's Knight Opening?
The main continuations include: Petrov Defense; Philidor Defense; King's Knight Opening: Nc6. Each variation leads to distinct types of positions with their own strategic themes.
What are the win rates for the King's Knight Opening?
Across 816 million Lichess games, White wins 51.1% of the time, Black wins 44.6%, and 4.3% are drawn. Notable master practitioners on the White side include Viswanathan Anand and Sergey Karjakin. On the Black side, Ivan Sokolov and Levon Aronian are among the most frequent practitioners.
Related Openings
Bishop's Opening
Bishop's Opening with 2.Bc4: a quiet way to sidestep the Petrov and steer for Italian, Vienna or 3.d3 setups. Play vs. AI on Chessiverse.
Bishop's Opening: Nf6
Bishop's Opening with 2…Nf6: avoids the …Nc6 mainlines and steers into Vienna-style structures. 49M database games available. Play vs. AI on Chessiverse.
Center Game
Centre Game (2.d4 exd4 3.Qxd4): early queen development for fast piece play and kingside pressure. Play vs. AI on Chessiverse.
Open Games (1…e5)
- e4 e5 — the classical open game. Gateway to the Italian, Ruy Lopez, Scotch, Petrov and King's Gambit. Play vs. AI on Chessiverse.
Reviewed by
IM John BartholomewCo-Founder & Chess Educator
International Master and chess educator. Co-founded Chessable and joined Chessiverse as co-founder. Best known for his "Climbing the Rating Ladder" YouTube series and structured opening courses.
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