Day 17 · Week 03 · Pins, Skewers & Discoveries
Skewers
Teach skewer geometry and how it differs from a pin.
A skewer reverses the usual pin relationship: the more valuable piece is attacked first and must move, exposing the less valuable piece behind it. Checks are especially strong skewers because the king must respond.
The key is alignment. Before celebrating, verify that the rear piece really becomes capturable and that the front piece has no counterattack that changes the result.
Training flow: 1. Pin vs skewer comparison. 2. King-line skewer examples. 3. Queen/rook/bishop skewer examples. 4. Defensive alignment-breaking drill. 5. Timed mixed set.
Common errors: Calling every line attack a skewer. Forgetting that the rear piece may be defended. Not checking alternate king moves. Confusing the value order.
Mastery gate: 7/8 correct and accurate pin/skewer classification.
Review: Draw the value order for a pin and a skewer in one line each.
Duration: 60–80 min
Find the skewer.
LESSON · difficulty 3 · skewer/check · 0s · attempts 0 · hints 0
Rg1 checks the king, and the queen stands beyond it. After Kh3, the queen can be taken.
Find the skewer.
THINK · difficulty 3 · skewer/check · 0s · attempts 0 · hints 0
Find the skewer.
PUZZLE · difficulty 3 · skewer/check · 0s · attempts 0 · hints 0
Find the skewer.
PUZZLE · difficulty 3 · skewer/non-check · 0s · attempts 0 · hints 0
Find the skewer.
PUZZLE · difficulty 3 · skewer/non-check · 0s · attempts 0 · hints 0
The loose piece is poisoned. Find the move that refuses it.
PUZZLE · difficulty 3 · loose piece/poison · 0s · attempts 0 · hints 0
Your loose piece is attacked. Save it.
PUZZLE · difficulty 3 · loose piece/save · 0s · attempts 0 · hints 0
The knight is pinned to the king. Take it.
PUZZLE · difficulty 3 · capture/pin · 0s · attempts 0 · hints 0