CAISSA RESEARCH
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Quick blunders · brianhliou

Generated 2026-05-01 05:28 UTC · 5629 games scanned · 52685 user moves with evals
Moves where you had time on the clock, played fast anyway, and dropped equity. The opposite of a long think — these are decisions that should have been worth a moment.
Filter: move took ≤5s, you had ≥60s on the clock, dropped ≥Δ1.00, plies 16–80. Coverage depends on eval data — sparser on free tier.
your move · engine's pick
# Opening ply your move engine pick drop move time clock left game
1 Caro-Kann Defense: Exchange Variation B13
show position 
r . k . . n r .
. p . . Q . . .
p q . . p . . p
. . . P . . . P
. . . b . B p .
N . . B . . . .
P P . . . P P .
. . . . R . K .
 47 Bxf2+ — Δ14.60 3.9s 76s JIYac9s2
2 Queen's Pawn Game: London System D02 blunder
show position 
. . . . . r . k
. . . . . . p .
. . . . . q p p
. B . p . . . n
P . . N . . . .
. . . . . P P .
. P . Q R . K P
. . . . . . . .
 76 Ne6 Qe3 Δ12.29 4.3s 68s ILzj0vzK
3 Bishop's Opening C23
show position 
. . . . . . . .
k . R . . . . .
. . . p . . . r
P . . . . . . .
. . B p P . . .
. . . P . . . p
K P r . . . . .
. . . . . . . .
 77 Ka8 Kb8 Δ10.84 2.2s 116s 35Npi3zX
4 Caro-Kann Defense: Exchange Variation B13 blunder
show position 
. r . . . q k .
p p . . . p . p
. . . . . b p .
. . . p . . . .
. P . n . Q B .
P . . . . . . P
. . . . . P P .
. . R . R . K .
 43 Qg7 Kg7 Δ10.59 3.4s 89s T4GLreAk
5 Van't Kruijs Opening A00
show position 
. . . . . r . k
p . b . . . . p
. . p r . . . .
. p . n . q p .
. . . P N . . .
P . . . P p P P
. P Q B . P . K
. . R . . R . .
 57 Re6 Rh6 Δ10.31 2.4s 64s 2AaVpiuh
6 Queen's Pawn Game: London System, with e6 D02 blunder
show position 
. . . . . r k .
. . . . . p p p
. . . . p . . .
. Q . . B . q .
. . . P . . . .
. . . . . P . .
. P . . . P . P
. . . . R . K .
 50 Bg3 Kh1 Δ9.51 2.7s 107s KFsXjPLZ
7 Scotch Game: Mieses Variation C45
show position 
. r . q k . . r
p b p B . . p .
. . p . . . n .
. . . . p . N p
. b P . . P . P
. P . Q . . P .
P . . . K . . .
. . . R . . . R
 45 Ke7 — Δ9.50 3.4s 95s g1qhq908
8 Queen's Pawn Game: London System, with e6 D02 blunder
show position 
. . . . k b . .
. . . b . p . .
. . n . p . . .
. . . p P . N r
. . p P . . . .
. . P . P . . .
. . . . . . . .
q N . Q K . R .
 50 Nxf7 Qxh5 Δ9.06 3.4s 70s tDA4kcc1
9 Caro-Kann Defense: Panov Attack, Modern Defense, Mieses Line B13 blunder
show position 
. . r r . . k .
. p . . q p b p
p . n . p . p .
. . N n . . . .
. . . P . . . .
P . . Q B B . P
. P . . . P P .
. . R R . . K .
 37 Qd6 Nxe3 Δ8.49 1.8s 116s 4ELUBQGe
10 Zukertort Opening: Nimzo-Larsen Variation A05 blunder
show position 
. . . . R r k .
. . . . . p . .
. p R . . . p .
p . . p . . . p
. . . . . b . .
P P . P . . P .
. q . N . . K P
. . . . . Q . .
 49 Qxd2+ Rxe8 Δ7.95 2.8s 129s J25CjsqD
11 Blackmar-Diemer Gambit Accepted: Ziegler Defense D00 inaccuracy
show position 
r . . . k . . r
p p . . . . p p
n . p . P . . .
. . . . . . B .
. . B P . . . q
. . P . . . . .
P . P . . . Q b
R . . . . R . K
 35 Qh5 Qg3 Δ7.82 1.0s 75s ONLX4DyA
12 Queen's Pawn Game: Accelerated London System D00
show position 
r . b . . r k .
p p . n . . p p
. . p . p . . .
. . . p N p . .
. . . P n P . q
. . P B . P . .
P P . N Q . P P
R . . . K . . R
 22 Kf1 g3 Δ7.51 3.0s 172s 0IOsRTPB
13 Caro-Kann Defense: Advance Variation, Tal Variation B12 blunder
show position 
. . . k r . . .
R . . . . . . .
. . . . P n p .
. . . p . . N p
. . p P . P . P
b . . . . . r .
P . K . . . . .
. . . . . . . R
 65 Bd6 Rg2+ Δ7.34 1.9s 63s ObSLLZH9
14 Caro-Kann Defense: Tartakower Variation B15
show position 
. . . r . n k .
. . . . . . . r
. . p q . . . .
. . . . P p P B
. p P . . . . .
p P . . . . . .
P . . Q . P . .
. . K R . . . R
 57 Qxd2+ Qxe5 Δ7.14 0.0s 91s 4V8J0VyW
15 King's Indian Defense: Fianchetto Variation, Debrecen Defense E67 blunder
show position 
. . . . . r k .
. p p . . . . p
. . . p . . p .
p . . P p . q .
. . P . . r P .
. P . . Q P . R
P . . . . . K .
. . . . . . . R
 69 Rxg4+ h5 Δ7.08 4.4s 192s nyqNXUPa
16 London System A48
show position 
. . n . . r . k
. . . . . p b p
p . N . . . p .
. r P . p . . .
. . . . . . . .
. . . . . Q B P
q . . . . P P .
. R . . . R K .
 44 Kh1 Rxb5 Δ7.04 1.4s 76s 2UAgGrHo
17 Queen's Pawn Game: London System, with e6 D02 blunder
show position 
. . k . . r . .
p p p . . . . .
. q . . . . . .
. P . p P . . p
P R . P . P r .
. Q . . K . . .
. . . . . . . P
. . . . . R . .
 60 Rf3 Qxd5 Δ6.96 1.0s 82s t6hlhJts
18 Queen's Pawn Game: Zukertort Variation D02 mistake
show position 
. . . . r . . .
. p b . . . . .
p . p . . . k p
. . P p . . P .
. P . B r . P .
. . P . P . . P
. . . . . R K .
. . . . . R . .
 69 Kxg5 Bd8 Δ6.96 1.1s 60s YBzAAjkT
19 Rapport-Jobava System D01 blunder
show position 
. . . . . . . .
. . . . . . . .
. . . . . p . p
. . . . . . . .
p . . . K . P P
P . k . . . . .
. . . . . P . .
. . . . . . . .
 80 Kf5 h5 Δ6.94 0.3s 83s oN2HW62r
20 English Opening: King's English Variation, Reversed Sicilian A21 blunder
show position 
. . . b . r k .
. r . . . p . p
. R q p . . p .
p . n N p . . .
. . P . . P . .
. . N P . . P .
P . . Q P . . P
. R . . . . K .
 45 Bxb6 Rxb6 Δ6.66 2.9s 123s i3NEuMXo
21 Nimzo-Larsen Attack A01
show position 
. b . r . n . .
p p . . . k . .
. . p . . . . .
. . . p . . . .
. . . P . . . p
. P . . . B . P
P . . . R P . .
. . B . . . K .
 71 Re8 Ne6 Δ6.63 1.2s 69s xoRq80wO
22 Caro-Kann Defense B10
show position 
r . . r . . k .
p p . . b p p p
. . . q b . . .
. . . . . . P P
. . . p . B . .
P . . P . P . .
. P . Q . . . .
. . K R . . N R
 35 Qd5 Rdc8+ Δ6.51 4.0s 107s 48nQFgRN
23 Sicilian Defense: Delayed Alapin Variation B22 blunder
show position 
. . . . . . . .
p . . . k . . p
. p . . . p p .
. P . P . . . P
. . . K . . P .
. . . . . . . .
. . . . . . . .
. . . . . . . .
 74 hxg6 h6 Δ6.50 4.0s 83s lJ16P7Jb
24 Caro-Kann Defense: Panov Attack, Modern Defense, Carlsbad Line B13 blunder
show position 
r . . . . . . .
. . Q . . . k .
. . p . p . . p
. . P p . p . .
. . b P . . p q
. . N . . . . .
. . . . . P P .
. . . . R . K .
 53 Kg6 Kf8 Δ6.45 3.2s 106s ww13tMXU
25 Queen's Pawn Game A40 blunder
show position 
r . b . . . k .
. . . n . . r .
. p . . . . p Q
. p . p . . P .
. . . p p P . .
. . P . . . . .
P P . . . P . .
. . K . . . . R
 52 cxd4 f5 Δ6.37 4.3s 139s ebEDcDCm
26 King's Gambit Accepted: MacLeod Defense C34 inaccuracy
show position 
r . b . . r k .
p p . . . p p p
. . . . . R . .
n . p P B . . Q
. . . . P . . .
. . N B . . . P
P q P . . . P .
R . . . . . . K
 31 gxf6 Qxa1+ Δ6.26 0.0s 98s DhdOyhhd
27 Ruy Lopez: Morphy Defense, Modern Steinitz Defense C71
show position 
r . . . . . . .
. p p b . . . k
n . . p . . . .
p . . P . . Q .
. . P b . . . .
. . . . . . . P
P P . . . q P .
R . . . R . . K
 49 Be5 Bf6 Δ6.22 3.8s 75s 3eokh2N2
28 Queen's Pawn Game: London System D02 blunder
show position 
r . . . . . . r
p p . k . . p .
. . p . p . q .
. . . p . . b p
. . . P . B . .
. . . . P . . Q
P P P . . . . P
. R . . . R K .
 44 Kh1 Qg2 Δ6.20 2.3s 113s NjzlLUuH
29 King's Indian Defense: Normal Variation E70 blunder
show position 
r n b q r . k .
p p . . . p b p
. . . p . . p .
. . p P . . B n
. . P . . . . .
. . N B . P . .
P P . . N . P P
R . . Q . R K .
 21 f6 Qxg5 Δ6.13 2.5s 247s dhhed0bZ
30 Caro-Kann Defense: Tartakower Variation B15
show position 
. . . . . . . .
. . . . . . k .
. . . . . . r .
. . . B P . . .
. p P n . p . .
p P . . . . . .
P . . K . P R .
. . . . . . . .
 73 Nf5 Rxg2 Δ6.05 1.7s 72s 4V8J0VyW
31 Queen's Pawn Game: London System, with e6 D02 blunder
show position 
. k b . r . . .
p p p . . p p p
. . . . . . . .
q . . . . . . .
. . Q P B . . .
. . . . . . . .
P P . . . P P P
. . R . . . . K
 46 Bf3 b4 Δ5.76 2.2s 85s OIgTk7lw
32 Queen's Pawn Game A41 inaccuracy
show position 
. . . . . r k .
p . . . . p b .
. . q . . . . p
. p . N p . p .
. . . . Q . . .
. P r . . . P .
P . . . . P P .
R . . . R . K .
 48 Nxc3 Ne7+ Δ5.72 1.6s 68s 6pm1RJCv
33 Queen's Pawn Game A41
show position 
. . . . q . k .
p p p . . b b .
. . . p . . . p
. . . P . . p .
. . Q . . p P .
. . P B . . . P
P P . N . . P .
. . . . . . K .
 52 Kf2 Be4 Δ5.69 0.6s 134s 5AUeAETO
34 Queen's Pawn Game: Accelerated London System D00 blunder
show position 
. . . . . Q . .
. . . . . p . p
r . . . p . p .
. . . p . . . k
. . . . q P . .
. . . . . . P .
. . . . . P K .
. . . . . R . .
 64 Kh2 f3 Δ5.68 3.6s 63s 6QnIyBPV
35 English Opening: Great Snake Variation A10
show position 
. . r . . . . .
. p . . . . k p
. . p . . p p .
. . b . p . . .
p . B . P . q .
P . . Q . N P .
. P . . . P K .
. . . . . . . .
 65 Be7 Bd4 Δ5.65 3.7s 71s ZUEK8NYz
36 Queen's Pawn Game: London System D02 blunder
show position 
. . . . . . . .
. . . . . . . .
. . . . . . p p
p p . k . p . .
. . p . . P . .
. P P . K . P .
P . . . . . . P
. . . . . . . .
 72 h3 b4 Δ5.58 3.0s 91s SMPSE69m
37 King's Knight Opening: Normal Variation C44 blunder
show position 
. . k . . . . r
p . p . . . p .
P p . . . p . .
. . n . p . . p
. . Q . P . n P
. . P r . . P R
. P . . K . . .
R . . . . . . .
 54 Qxd3 b4 Δ5.50 1.9s 180s kJDAzdCa
38 East Indian Defense A48
show position 
r . . q r . k .
p b p n p p b p
. p . p . n p .
. . . . . . . .
. . . P . . . .
. . P . P B . .
P P . N . P P P
R . B Q N R K .
 19 e5 Bxf3 Δ5.46 0.3s 178s lLvjPPJT
39 Indian Defense: Accelerated London System A45
show position 
. . . . . . k .
. . . . . p . p
. p . b . . p .
. . . p . p . .
. . . P n . . .
. . . . P N . .
P . r N . P P P
R . . . . K . .
 36 Rb1 Nxe4 Δ5.42 3.8s 105s 3DLxYI3F
40 Indian Defense: Accelerated London System A45
show position 
. . . . . r k .
. . . p . . p .
. p . . p . . p
. . . . . . . .
r P . . . . . .
. . K . p P . .
. . . n N . . P
. . . . . . R .
 56 f4 — Δ5.38 2.8s 71s lmr0ATEt
41 Indian Defense: Accelerated London System A45
show position 
. . . r . . k .
p . . . . . p p
. p R r p . . .
. . . . . p . .
. . . . . q . .
. P . . . P . .
P . . . Q P . P
. . R . . . K .
 54 Rxd6 Rc8 Δ5.37 3.6s 120s 37bctSk3
42 Sicilian Defense: Alapin Variation B22 blunder
show position 
. . r q . r . .
. p . . n p b k
p . . p . . . p
. . . P p N p .
P P . . P . n .
. Q N B . . P b
. . . B . P . P
R . . . R . K .
 38 f3 Nxe7 Δ5.37 4.4s 173s PtiS3WMY
43 King's Indian Defense: Sämisch Variation, Sämisch Gambit E81
show position 
. . . . . r . .
. . . . . p . k
. . . p . . p P
. . n P . . . .
. q B . . . . P
. p . . . . . .
. Q . . . . . .
. K . R . . . R
 63 Kxh6 f6 Δ5.31 4.7s 68s NncFJyin
44 Sicilian Defense: Accelerated Dragon, Maróczy Bind B38 blunder
show position 
r . . . . r . .
p p . . p p k p
. . n p b n p .
. . . . . . . .
. . P . P . . .
P q N . B P . .
. P . Q B . P P
R . . . . R K .
 27 Bxc4 Rfc8 Δ5.30 1.9s 179s eVCkL7R1
45 Queen's Pawn Game: Accelerated London System D00 blunder
show position 
. . . . . . . .
p . . r . p p p
. p N k p n . .
. . . . . . . .
. . . . . . . .
. . P . . . . P
P P . . K P P .
. . . . R . . .
 50 Rd1+ Nd4 Δ5.27 1.2s 105s Q4kEyASc
46 Indian Defense: London System A46 blunder
show position 
r . . . q . k .
p . . r . . p p
R p . . . p . .
. . . . p . . .
. . . . Q . . .
. . P . . . . P
. P . . . P P .
R . . . . . K .
 56 Qc6 Rxb6 Δ5.27 3.6s 98s c63sdvAB
47 Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense B12 blunder
show position 
. . . . . r k .
. p . . r . p .
p R n . . . . p
. . P p q . . .
. . . . . . B .
P . . . P . . P
. . . Q K . P .
. . . . . R . .
 57 Rxf1 Nd4+ Δ5.24 3.9s 145s S1Xg8rHt
48 Indian Defense A45
show position 
r . . . . r k .
p . q n p . . p
Q p p . . . p .
. . . . P p . .
P . P P p . . .
B P . . P . . .
. . . . . . P P
R . . . . R K .
 41 Rfe8 Nb8 Δ5.20 3.2s 66s S4zEZESM
49 Slav Defense: Modern Line D11 blunder
show position 
. . r . . . k .
r . . . . p . p
. . . . p . p .
. . . . . . . .
. p p P . . . .
. . b . P Q P .
. . R . K P . P
. . . . . . . .
 47 Rca8 Ba1 Δ5.17 2.8s 87s boNYUXJi
50 Caro-Kann Defense: Panov Attack B13 blunder
show position 
. . . . . . . r
p p q . . p k .
. . r . p b . p
. . . . . . . .
. . . P . . . .
P . . B . Q P .
. P . . . P . P
. . . R . R K .
 55 Bxd4 Rd6 Δ5.16 1.5s 60s rgCuwSVc
Caissa Research · quick-blunders report · rushed user moves with drop ≥ Δ1.00, played in ≤5s with ≥60s on the clock