Day 23 · Week 04 · Advanced Motifs & Calculation Hygiene
Removal of Defender & Overload
Teach how tactical targets become vulnerable when a defender is eliminated or forced to do too many jobs.
A target may look safe because it is defended. The important question is: by whom, and what else is that defender responsible for? Removal of defender is direct; overload is structural pressure on one piece with incompatible duties.
The student should map defender→duties before calculating. This makes the tactic understandable rather than magical.
Training flow: 1. Defender mapping drill. 2. Direct removal examples. 3. Pin-the-defender examples. 4. Overload examples with two duties. 5. Defensive resource search.
Common errors: Capturing a defender without checking recapture. Calling any busy piece overloaded. Missing a replacement defender. Ignoring king-safety duty.
Mastery gate: 7/8 correct and accurate defender-duty map.
Review: For one overload position, list both duties the defender cannot maintain.
Duration: 70–90 min
The knight is pinned to the king. Take it.
LESSON · difficulty 4 · capture/pin · 0s · attempts 0 · hints 0
Qxa4 captures the knight. The knight is pinned to the king on the same line, and it is the only free capture.
The knight is pinned to the king. Take it.
THINK · difficulty 4 · capture/pin · 0s · attempts 0 · hints 0
The knight is pinned to the king. Take it.
PUZZLE · difficulty 4 · capture/pin · 0s · attempts 0 · hints 0
Your loose piece is attacked. Save it.
PUZZLE · difficulty 4 · loose piece/save · 0s · attempts 0 · hints 0
Your loose piece is attacked. Save it.
PUZZLE · difficulty 4 · loose piece/save · 0s · attempts 0 · hints 0
Find the knight check that also attacks the queen.
PUZZLE · difficulty 4 · fork/knight-queen · 0s · attempts 0 · hints 0
Which move discovers check from the rook?
PUZZLE · difficulty 4 · check/discovered · 0s · attempts 0 · hints 0
You are in check. Find the move that keeps the most material.
PUZZLE · difficulty 4 · defense/check · 0s · attempts 0 · hints 0