CAISSA RESEARCH
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Drills · Opening preparation

brianhliou · 8 drills across 3 patterns · 2026-05-01 05:28 UTC
Top diagnosis: 62 opening preparation gaps positions across 3 openings

1. opening preparation gaps in the Sicilian Defense: Alapin Variation (3 positions)

3 of your opening preparation gaps mistakes happen in this opening, averaging 117cp lost. Most-played: d4 ×1, e5 ×1, a4 ×1. Engine prefers: e5 ×1, Nc3 ×1, Bc4 ×1.

Drill focus: Step through these 3 positions; name what makes the engine's move stronger before revealing it.
drill 1 of 3

Find a better move than d4.

Sicilian Defense: Alapin Variation · ply 4 · white to move · you played d4
Show engine choice
Engine recommends: e5 (your move lost Δ1.28)
drill 2 of 3

Find a better move than e5.

Sicilian Defense: Alapin Variation · ply 8 · white to move · you played e5
Show engine choice
Engine recommends: Nc3 (your move lost Δ1.18)
drill 3 of 3

Find a better move than a4.

Sicilian Defense: Alapin Variation · ply 6 · white to move · you played a4
Show engine choice
Engine recommends: Bc4 (your move lost Δ1.06)

2. opening preparation gaps in the Queen's Pawn Game: Accelerated London System (3 positions)

3 of your opening preparation gaps mistakes happen in this opening, averaging 120cp lost. Most-played: Nf3 ×1, Bg4 ×1, g3 ×1. Engine prefers: Nc3 ×1, Nf6 ×1, Ne2 ×1.

Drill focus: Step through these 3 positions; name what makes the engine's move stronger before revealing it.
drill 1 of 3

Find a better move than Bg4.

Queen's Pawn Game: Accelerated London System · ply 9 · black to move · you played Bg4
Show engine choice
Engine recommends: Nf6 (your move lost Δ1.43)
drill 2 of 3

Find a better move than Nf3.

Queen's Pawn Game: Accelerated London System · ply 8 · white to move · you played Nf3
Show engine choice
Engine recommends: Nc3 (your move lost Δ1.16)
drill 3 of 3

Find a better move than g3.

Queen's Pawn Game: Accelerated London System · ply 12 · white to move · you played g3
Show engine choice
Engine recommends: Ne2 (your move lost Δ1.01)

3. opening preparation gaps in the Indian Defense: Accelerated London System (2 positions)

2 of your opening preparation gaps mistakes happen in this opening, averaging 157cp lost. Most-played: Qxb2 ×1, Bd3 ×1. Engine prefers: a6 ×1, Rb1 ×1.

Drill focus: Step through these 2 positions; name what makes the engine's move stronger before revealing it.
drill 1 of 2

Find a better move than Qxb2.

Indian Defense: Accelerated London System · ply 9 · black to move · you played Qxb2
Show engine choice
Engine recommends: a6 (your move lost Δ1.92)
drill 2 of 2

Find a better move than Bd3.

Indian Defense: Accelerated London System · ply 10 · white to move · you played Bd3
Show engine choice
Engine recommends: Rb1 (your move lost Δ1.22)