Lesson Plan 9: Forks

One Piece, Two Targets

Duration

45 Minutes

Week

Week 9 of 16

Prerequisites

Lessons 1-8

Learning Objectives

Students will define a fork as one piece attacking two or more targets
Students will find a knight fork in a set position
Students will create a fork against an opponent in play
Students will explain why a fork against the king is the hardest to answer

Materials Needed

Chess sets (1 per 2 students)
Demonstration board
Fork puzzle cards (six positions)
Counters to mark the two targets

What to Teach About Forks

A fork is one move that attacks two things
Any piece can fork: pawns and knights do it most often because their attacks point in two directions at once
A fork works when the defender cannot save both
A fork that includes the king is strongest: the check must be answered, so the other piece falls
Defences exist: capture the forking piece, defend both, or counter-attack with a bigger threat

Lesson Timeline

5 min

Review & Hook

Place a knight on e5, a black king on g8 and a black rook on c6. "How many black pieces is this knight attacking? What can Black do about it?"

12 min

Knight Forks

Work through the hook position together: the check must be answered, the rook is lost
Show the royal fork — king and queen — and let the groans happen
Point out the knight's shape: its eight squares are never on the same line, which is why it forks so often
Pairs set up two black pieces and try to find a knight square that hits both

10 min

Pawn and Other Forks

A pawn attacking two pieces diagonally is the cheapest fork there is
Show a queen forking a king and a loose rook
Introduce the word loose: undefended, and therefore worth looking for

10 min

Puzzle Round

Six fork positions on cards, passed between pairs
Rule: say which two pieces are attacked before making the move
Collect answers as a class and name the piece doing the forking each time

6 min

Fork Hunt

Partners play the hunt below.

2 min

Wrap-Up

Ask: "Before you move a piece, what question should you now ask?" Answer: can it attack two things at once?

Fork Hunt Rules

Play a normal game from the starting position
A player who creates a fork says "fork" aloud and names the two targets
A correct fork scores a point, whether or not it wins material
A claimed fork that attacks only one thing loses a point
Play for fifteen minutes; highest score wins the hunt, regardless of the game result

Teacher Tip: Teach the scan: after any opponent move, look for two of their pieces that are undefended or that include the king, and ask whether one of your pieces can reach a square attacking both. The habit matters more than the puzzles.

Assessment

Observation: during the hunt, check that claimed forks really attack two targets
Puzzle cards: at least four of six found
Exit question: "Why is a fork that gives check harder to answer than one that does not?"

Common Mistakes to Address

Calling an attack on one piece a fork
Forking two pieces that are both defended, and losing the forking piece
Missing that the forking piece can simply be captured
Looking only for knight forks and missing pawn forks, which are more common

Differentiation

Support: Give positions where both targets are already marked with counters, so the child only has to find the square.
Challenge: Ask for a fork that is still good even though the forking piece can be captured — a sacrifice that wins more than it costs.