Generated 2026-05-01 05:28 UTC · brianhliou ·
30 of 152 sampled · model heuristic-v1 ·
0 in / 0 out tokens
1. calculation slips in the middlegame in the London System (3 positions)
3 of your calculation slips in the middlegame mistakes happen in this opening, averaging 206cp lost. Most-played: e5 ×1, Red1 ×1, Nf8 ×1. Engine prefers: Qc8 ×1, Rd7 ×1, Nf6 ×1.
Drill: Step through these 3 positions; name what makes the engine's move stronger before revealing it.
#26 · ply 41 · black
. . . r r . k .
p b p n . p b .
. p . . q . . p
. . . . p N p .
. P . . P n . .
. . P . . N B P
P . Q . B P P .
. . R R . . K .
Nf8
→ Nf6
drop Δ2.12 · London System
#10 · ply 46 · white
. . r . . r k .
q . n . n p b p
p . . R p . p .
. p . . P . . .
. . . . B . . .
P P . . . N B P
. . . . Q P P .
. . . . R . K .
Red1
→ Rd7
drop Δ2.06 · London System
#7 · ply 19 · black
r . . q r . k .
p b p n p p b p
. p . p . n p .
. . . . . . . .
. . . P . B . .
. . . . P B . P
P P P N . P P .
R . . Q N R K .
e5
→ Qc8
drop Δ2.00 · London System
2. calculation slips in the middlegame in the Caro-Kann Defense: Breyer Variation (2 positions)
2 of your calculation slips in the middlegame mistakes happen in this opening, averaging 323cp lost. Most-played: c3 ×1, Ncxe5 ×1. Engine prefers: Bf4 ×1, exf5 ×1.
Drill: Step through these 2 positions; name what makes the engine's move stronger before revealing it.
#5 · ply 18 · white
r n b q . r k .
p p b . . . p p
. . p . . n . .
. . . . p p . .
. . N . P . . .
. . . . . N P .
P P P . . P B P
R . B Q . R K .
Ncxe5
→ exf5
drop Δ3.95 · Caro-Kann Defense: Breyer Variation
#3 · ply 24 · white
r . . q . r k .
p b . n . p b p
. p n . p . p .
. . p p P . . .
. . . . . . . P
. . . P . N P .
P P P . Q P B .
R . B . R N K .
c3
→ Bf4
drop Δ2.51 · Caro-Kann Defense: Breyer Variation