This file contains the exercise positions, hints, and solutions. Ask the student to name the forking piece and both targets before giving the move.
Marking principle: Award full credit only when the student identifies why the move works, not merely the correct destination square. For checking forks, the student should explain that the opponent must answer the check first.
Exercise answers
Puzzle 1 — Set up a rook fork
White to move
Hint: Start with a rook check on f8. What happens if the queen captures it?
Answer: 1. Rf8+! Qxf8 2. Rxf8+. The second rook captures the queen and forks the king on h8 and bishop on c8.
ChessGo sample #1: f7–f8, d8–f8, f1–f8
Puzzle 2 — Queen fork
White to move
Hint: Can the queen give check AND attack the rook on f8?
Answer: 1. Qc5+! The queen checks the king on a7 and attacks the rook on f8. ChessGo's line continues 1...Kb8 2.Qxf8+.
ChessGo sample #2: g5–c5, a7–b8, c5–f8
Puzzle 3 — Knight fork
White to move
Hint: Look for a knight check that also attacks the rook.
Answer: 1. Ne5+! The knight attacks the king on g6 and rook on g4. ChessGo's line continues 1...Kf6 2.Nxg4.
ChessGo sample #3: f3–e5, g6–f6, e5–g4
Puzzle 4 — Black knight fork
Black to move
Hint: Which knight jump checks the king and attacks the queen?
Answer: 1...Ne2+! The knight checks the king on g1 and attacks the queen on f4. ChessGo's line continues 2.Kh2 Nxf4.
ChessGo sample #4: g3–e2, g1–h2, e2–f4
Puzzle 5 — Bishop fork
White to move
Hint: Find a bishop move with check. From the new square, can it also see the rook?
Answer: 1. Bd6+! The bishop checks the king on e7 and attacks the rook on b4. ChessGo's line continues 1...Kf6 2.Bxb4.
ChessGo sample #5: e5–d6, e7–f6, d6–b4
Puzzle 6 — Another knight fork
White to move
Hint: Which knight move checks the king on f6 and also attacks c5?
Answer: 1. Ne4+! The knight attacks the king on f6 and bishop on c5. ChessGo's line continues 1...Ke7 2.Nxc5.
ChessGo sample #6: g5–e4, f6–e7, e4–c5
Puzzle 7 — Black forks king and rook
Black to move
Hint: Search all knight checks first.
Answer: 1...Ne1+! The knight checks the king on g2 and attacks the rook on c2. ChessGo's line continues 2.Kf1 Nxc2.
ChessGo sample #7: d3–e1, g2–f1, e1–c2
Puzzle 8 — Knight forks king and queen
White to move
Hint: Can the knight check the king and attack the queen at the same time?
Answer: 1. Ne7+! The knight checks the king on g8 and attacks the queen on g6. ChessGo's line continues 1...Kh7 2.Nxg6.
ChessGo sample #8: f5–e7, g8–h7, e7–g6
Puzzle 9 — Black bishop fork
Black to move
Hint: A checking bishop move can hit the rook on b6 along the other diagonal.
Answer: 1...Bd4+! The bishop checks the king on g1 and attacks the rook on b6. ChessGo's line continues 2.Kh2 Bxb6.
ChessGo sample #9: e5–d4, g1–h2, d4–b6
Puzzle 10 — Bonus: finish Puzzle 1
White to move
Hint: The black queen has just captured on f8. Which rook move gives check and attacks another piece?
Answer: 2. Rxf8+! White captures the queen. The rook on f8 now checks the king on h8 and attacks the bishop on c8 — a rook fork.
Derived teaching position from the continuation of ChessGo sample #1
Source note: Puzzles 1–9 follow the tactical lines from ChessGo's Fork — Easiest sample. Puzzle 10 is a one-move teaching continuation derived from source Puzzle 1. Boards are simplified redraws rather than copied screenshots.