The Mikenas Defense is 1.d41…c6: you bring the knight out before any pawn and aim it at d4, the pawn your opponent just pushed. Across 57,457 Lichess games rated 900 to 1700 (September 2026 data), you score 44%. Online players rated over 2200 score 48 out of 100 with it. It's a rare choice: it turns up in about 2 out of 1000 games at your level.
Lichess games from September 2026 (30,577,162 rated 900 to 1700) and 31,791 over-the-board games rated 2300+ from the last 12 months. Data updated: October 14, 2026.
At a glance
Moves
1.d4c6
ECO
A40
Amateur games
57,457
Of all games rated 900 to 1700
0.2%
White's score
Lichess 900–1700: 56.2% · Online, 2200+: 51.7% · Over the board, 2300+: 16.7%
Evaluation after 1…c6
+0.86
4 named lines in this family; 1 with their own page.
By rating
The opening's share in each Lichess rating band.
0.4%900–1100
0.2%1100–1300
0.2%1300–1500
0.1%1500–1700
What amateurs play and what strong players play
After 1…c6, opponents at your level answer 2.f3 in 27 out of 100 games, 2.f4 in 16, and 2.c4 and 2.d5 in 13 each. Among strong players, 2.f3 climbs to 36 and 2.d5 to 22.5. That push hits your knight and is the evaluation's top choice, giving your opponent a 0.86-pawn edge; you score 42 out of 100 against it. Against 2.f3, the most common choice at your level is 2…d5, at 57 out of 100, and you score 46 with it. Strong players pick it in 46 out of 100 games and go for 2…d6 in 35. After 3.c4, players at your level mostly take with 3…dxc4, 38 out of 100, while strong players prefer 3…g4, 63.
After 1.d4c6 · N = 75,885
Move
Lichess 900–1700
White's score
Online, 2200+
Over the board, 2300+
f3
26.9%
56.7%
36.0%
no data
f4
16.3%
56.7%
6.2%
no data
c4
13.3%
55.6%
19.1%
no data
d5
13.2%
57.8%
22.5%
no data
e3
11.9%
54.4%
no data
no data
e4
5.7%
54.8%
6.0%
no data
c3
no data
no data
4.8%
no data
After 1.d4c62.f3 · N = 50,795
Move
Lichess 900–1700
White's score
Online, 2200+
Over the board, 2300+
d5
56.7%
53.9%
46.2%
no data
f6
17.6%
55.6%
7.9%
no data
e6
7.1%
56.1%
4.5%
no data
d6
5.9%
56.0%
35.2%
no data
e5
5.7%
57.5%
3.5%
no data
f6
2.0%
57.4%
no data
no data
g6
no data
no data
1.7%
no data
After 1.d4c62.f3d5 · N = 231,424
Move
Lichess 900–1700
White's score
Online, 2200+
Over the board, 2300+
e3
28.7%
53.6%
12.5%
no data
f4
24.8%
55.0%
27.1%
no data
c3
14.8%
51.2%
no data
no data
c4
11.2%
57.3%
34.7%
100.0%
g3
7.0%
54.6%
15.7%
no data
c3
4.2%
52.8%
3.2%
no data
g5
no data
no data
2.6%
no data
After 1.d4c62.f3d53.c4 · N = 34,412
Move
Lichess 900–1700
White's score
Online, 2200+
Over the board, 2300+
dxc4
37.6%
59.0%
3.2%
no data
e6
20.2%
55.0%
14.8%
no data
f6
18.8%
56.3%
6.9%
no data
g4
11.3%
53.5%
63.3%
no data
f5
6.8%
58.5%
1.5%
no data
e5
2.5%
54.6%
10.2%
no data
After 1.d4c62.f3d53.c4g4 · N = 3,568
Move
Lichess 900–1700
White's score
Online, 2200+
Over the board, 2300+
e3
36.0%
54.3%
18.6%
no data
c3
27.9%
54.5%
28.9%
no data
cxd5
16.8%
57.3%
46.3%
no data
h3
5.0%
47.2%
no data
no data
e5
4.5%
43.8%
3.7%
no data
f4
3.4%
52.1%
0.7%
no data
bd2
no data
no data
1.1%
no data
What to do here
The strong-player line is 2.f32…d53.c43…g44.cxd54…xf35.gxf35…xd5. It's all about the d4 pawn. Your c6 knight has been hitting it since move one, and your bishop goes after the f3 knight that defends it. You end up trading that bishop for the knight and taking back on d5 with your queen, which leaves d4 attacked twice and defended once.
2…d5 stakes out the center and stops the d4 pawn from reaching d5, where it would kick your knight. 3.c4 attacks your pawn. 3…g4 doesn't defend it; it attacks the f3 knight instead. At that point d4 has two defenders, the d1 queen and that knight, and one attacker, your c6 knight.
4.cxd5, the choice of 46 out of 100 strong players, wins your d5 pawn, but the white pawn left there has no defender and your d8 queen is attacking it. Before taking it back, 4…xf3, played in 90 out of 100 games, removes the piece guarding d4. After 5.gxf3, chosen by more than 6 in 10 strong players, the d5 pawn is still hanging. Your opponent is left with two pawns on the f-file and a half-open g-file in front of the kingside.
5…xd5, played by every strong player in the sample, wins the pawn back. Now your queen and your c6 knight both hit d4, and only the d1 queen defends it. From d5 your queen also eyes f3, held only by the e2 pawn, and a2, covered only by the a1 rook.
At your level the game rarely gets there. After 3.c4, just 11 out of 100 players choose 3…g4, and you score 46 with it. When you do, your opponent usually answers 4.e3, 36 out of 100, propping up d4 with a pawn. And after 4.cxd5, 80 out of 100 players at your level grab back right away with 4…xd5, against 1 in 10 strong players. With the knight still on f3, d4 keeps both its defenders, and 5.c3 hits your queen. Trade on f3 first, then bring the queen in.
The strong players' line
The most repeated move in games rated 2200+ online and 2300+ over the board, while at least 20 games play it
Move
Strong games
Chosen by
2.f3
3,735
36.0%
2…d5
2,542
46.2%
3.c4
2,630
34.8%
3…g4
1,428
63.3%
4.cxd5
855
46.3%
4…xf3
395
90.4%
5.gxf3
349
62.5%
5…xd5
218
100.0%
The mistakes that cost the most games
f6Mistake
After 2.e4, 2…f6 attacks the undefended e4 pawn, but leaves your knights exposed to your opponent's pawns. 3.d5 kicks the c6 knight, and after 3…e54.f44…g65.e55…g8 the other one is back home. 2…d5 hits e4 with a pawn. Almost 9 out of 100 players choose it; you score 43.7 with it and 48.5 with 2…d5.
9 in 100 play it in this position. It gives away 1.5 pawns of advantage. It scores 43.7%; d5 scores 48.5%.
e5Mistake
After 2.f3, 2…e5 puts a pawn where the f3 knight and the d4 pawn both attack it, with only your c6 knight defending. 3.d5 kicks that knight, and after 3…ce74.xe54…c65.e45…f6 you're a pawn down. 6 out of 100 players choose it. You score 42.5 with it and 46.1 with 2…d5.
6 in 100 play it in this position. It gives away 1.2 pawns of advantage. It scores 42.5%; d5 scores 46.1%.
e5Inaccuracy
After 2.f32…d53.e3, 3…e5 offers a pawn that the f3 knight and the d4 pawn both attack, guarded only by your knight. After 4.xe54…xe55.dxe5 you're a pawn down. 5 out of 100 players choose it, and at your level it seldom costs much: you score 45.6 with it and 47.7 with 3…g4.
5 in 100 play it in this position. It gives away 0.7 pawns of advantage. It scores 45.6%; g4 scores 47.7%.
f6Inaccuracy
After 2.f32…d53.e3, 3…f6 takes the f6 square from your g8 knight and develops nothing. After 4.c44…e65.c35…f56.d36…f6, you've moved the f-pawn twice just so the knight can reach f6. 4 out of 100 players choose it, and at your level it isn't punished: you score 48.1 with it and 47.7 with 3…g4.
4 in 100 play it in this position. It gives away 0.7 pawns of advantage. It scores 48.1%; g4 scores 47.7%.
b6Mistake
After 2.e4, 2…b6 ignores the center, and 3.d5 kicks your knight. After 3…b84.f34…e65.c35…b7, your knight is back home while your opponent has pawns on d5 and e4 and two pieces out. 2…d5 hits e4 with a pawn. 2 out of 100 players choose it. You score 39.5 with it and 48.5 with 2…d5.
2 in 100 play it in this position. It gives away 1.2 pawns of advantage. It scores 39.5%; d5 scores 48.5%.
xd4Blunder
After 2.f4, 2…xd4 grabs a pawn that the d1 queen defends. After 3.xd4 you've given up the knight for a pawn, and after 3…d64.d24…e55.d35…f5 you're still a piece down. 2…d6 cuts the f4 bishop's diagonal toward c7. 3 out of 100 players choose it. You score 29.5 with it and 47.4 with 2…d6.
3 in 100 play it in this position. It gives away 4.5 pawns of advantage. It scores 29.5%; d6 scores 47.4%.
How players castle
Lichess 900–1700 · the 6 most frequent combinations
White
Black
Games
O-O
O-O
15,017
Not castled
Not castled
11,711
O-O
Not castled
8,895
Not castled
O-O
5,803
O-O
O-O-O
4,681
O-O-O
O-O
3,668
Over the board, 2300+ · the 3 most frequent combinations