← The 4545 Chronicles
Season 50 · Round 4

4545 Novelty Watch

4545 theory on this page means what was played in earlier team-league games (51,042 games, Season 1 to Season 50 Round 3) - not opening books or engine lines. A move is new to the 4545 when no earlier league game reached the position after it.

Early novelties

New moves in moves 1-5, from the positions most played in earlier 4545 games.

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Early novelty of the week · move 3
3…a6

nikolast86 played it against Nestor3690.

362earlier 4545 games reached this position.
None of them played this move.

1.e4 c6 2.d4 d5 3.f3 a6

Caro-Kann Defense: Maróczy Variation · Nestor3690 v nikolast86 · ½–½ · see it ↗

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New to the 4545 · move 5
5…e6

ivanhomeless played it against f1re_bunny.

298earlier 4545 games reached this position.
None of them played this move.

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 e6

Caro-Kann Defense: Classical Variation · f1re_bunny v ivanhomeless · 0–1 · see it ↗

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New to the 4545 · move 5
5.Be3

Acebulf played it against PonderInSilence.

172earlier 4545 games reached this position.
None of them played this move.

1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Be3

French Defense: Rubinstein Variation, Blackburne Defense · Acebulf v PonderInSilence · ½–½ · see it ↗

Mid-opening novelties

New moves in moves 6-9, from the positions most played in earlier 4545 games.

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Mid-opening novelty of the week · move 9
9…Nd7

OK_4 played it against Lotus_62.

165earlier 4545 games reached this position.
None of them played this move.

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nd7

Ruy Lopez: Morphy Defense · Lotus_62 v OK_4 · 0–1 · see it ↗

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New to the 4545 · move 6
6…Nh5

SpacebarIsTaken played it against electricfalcon.

98earlier 4545 games reached this position.
None of them played this move.

1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Nc3 Be7 5.Bf4 O-O 6.e3 Nh5

Queen's Gambit Declined: Three Knights Variation · electricfalcon v SpacebarIsTaken · ½–½ · see it ↗

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New to the 4545 · move 6
6.h3

AScannerDarkly played it against scrytop.

78earlier 4545 games reached this position.
None of them played this move.

1.e4 c6 2.d4 d5 3.f3 dxe4 4.fxe4 e5 5.Nf3 Bg4 6.h3

Caro-Kann Defense: Maróczy Variation · AScannerDarkly v scrytop · 1–0 · see it ↗

Deep cuts

New moves from move 10 on, after a game had followed 4545 theory a long way. Positions at least 5 earlier 4545 games had reached.

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Deep cut of the week · move 10
10…Nd7

Castling-Companion played it against FunnyAnimatorJimTV.

21earlier 4545 games reached this position.
None of them played this move.

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Nf6 6.Nc3 d6 7.Be2 Nxd4 8.Qxd4 Bg7 9.Be3 O-O 10.Qd2 Nd7

Sicilian Defense: Accelerated Dragon · FunnyAnimatorJimTV v Castling-Companion · 0–1 · see it ↗

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New to the 4545 · move 12
12…Bh5

IroncladUnicorn played it against apawnpusher.

15earlier 4545 games reached this position.
None of them played this move.

1.e4 c6 2.d4 d5 3.exd5 cxd5 4.Bd3 Nc6 5.c3 Nf6 6.Bf4 Bg4 7.Qb3 Qd7 8.Nd2 e6 9.Ngf3 Bd6 10.Bxd6 Qxd6 11.O-O O-O 12.Rae1 Bh5

Caro-Kann Defense: Exchange Variation · apawnpusher v IroncladUnicorn · 1–0 · see it ↗

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New to the 4545 · move 13
13.Qc2

fritsj played it against chessyesmen.

12earlier 4545 games reached this position.
None of them played this move.

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.Ne1 Nd7 10.Be3 f5 11.f3 f4 12.Bf2 g5 13.Qc2

King's Indian Defense: Normal Variation · fritsj v chessyesmen · 0–1 · see it ↗

Off Script

Moves that were new for the player who made them, in spots they knew well.

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Off script · White · move 1
1.c4

HighonPotnuse played it against time_lord19.

75games as White.
Usually 1.d4 (56×), never 1.c4 before.

1.c4

English Opening: Anglo-Indian Defense · HighonPotnuse v time_lord19 · 1–0 · see it ↗

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Off script · Black · move 1
1…e6

cinemashow played it against kygreek.

25games facing 1.e4.
Usually 1…e5 (13×), never 1…e6 before.

1.e4 e6

French Defense: Advance Variation · kygreek v cinemashow · 0–1 · see it ↗

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Off script · White · move 2
2.Nc3

cvillian played it against MrScribbles.

28games in this position (after 1.d4 Nf6).
Usually 2.Nf3 (22×), never 2.Nc3 before.

1.d4 Nf6 2.Nc3

Rapport-Jobava System · cvillian v MrScribbles · 1–0 · see it ↗

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Off script · Black · move 2
2…c6

JohnJPershing played it against tranfunzel.

6games in this position (after 1.d4 d5 2.c4).
Always 2…e6 (6×), until now.

1.d4 d5 2.c4 c6

Semi-Slav Defense · tranfunzel v JohnJPershing · 0–1 · see it ↗

Where games left 4545 theory

The move number of each game's first new move (typical: move 7).

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Move number →

Longest in 4545 theory

Games that followed earlier league games the longest, and which game they matched last (the same position - the move order can differ).

GameLeft 4545 theoryLast matchedNew move
bufferunderrun v mobusel 1–0
Sicilian Defense: Alapin Variation
move 15 Their own game bufferunderrun v Hekkta (S47 R2, 0–1) and 2 others15.Rad1
GlennJamesMax v SP1389 0–1
King's Indian Defense: Normal Variation
move 14 Same position as kvltvr_wvltvr v mariuseg (S25 R2, 1–0)14.c5
lorb v asian42 1–0
Ruy Lopez: Berlin Defense, Rio Gambit Accepted
move 14 Same position as Castling-Companion v sorgall (S46 R5, 1–0) and 1 other14.Ne2
tranfunzel v JohnJPershing 0–1
Semi-Slav Defense
move 13 Same position as invinci7777 v Sesquipedalism (S25 R7, 0–1)13…Bb7
HorribleChessTV v Leverkuhn ½–½
Four Knights Game: Scotch Variation Accepted
move 13 Same position as Fierolocchio v Lou-E (S41 R4, 1–0)13…Bd6
cvillian v MrScribbles 1–0
Rapport-Jobava System
move 13 Same position as johanmk v TheVacuousRom (S37 R3, 0–1)13…Ne4