🔎 Halwone wchessGrade 4Reading: grades 3-4MultiplicationRoundingAdditionSubtractionDivision

The Haunted Chess Championship

At Spooky Rook Manor, the annual Halloween Chess Tournament was disrupted when a sneaky Ghost Grandmaster swiped the Golden King Trophy from the Trophy Keeper! Work through the clues to uncover the culprit.

Suspects

Possible suspects

Cross off a row as each clue rules it out. On screen, tap a row.

21 of 21 still in play

Name	Chess Move	Spooky Magic	Playing Hand	Wig Color	Secret Weapon
Magnus	Pawn Rush	Cobweb Trap	Right Handed	Orange Hair	Flashlight Beam
Gukesh	Bishop Diagonal	Ghost Float	Right Handed	Green Hair	Flashlight Beam
Vidit	Rook Slide	Cobweb Trap	Left Handed	Green Hair	Silver Bell
Garry	Pawn Rush	Candy Shield	Left Handed	Green Hair	Garlic Spray
Nodirbek	Queen Sweep	Cobweb Trap	Right Handed	Green Hair	Silver Bell
Alireza	Rook Slide	Ghost Float	Right Handed	Purple Hair	Flashlight Beam
Wesley	Pawn Rush	Pumpkin Blast	Right Handed	Green Hair	Silver Bell
Jeffery	Queen Sweep	Pumpkin Blast	Left Handed	Orange Hair	Flashlight Beam
Sam	Bishop Diagonal	Pumpkin Blast	Right Handed	Orange Hair	Flashlight Beam
Ray	Pawn Rush	Cobweb Trap	Right Handed	Green Hair	Silver Bell
Ding	Pawn Rush	Cobweb Trap	Right Handed	Purple Hair	Silver Bell
Ian	Pawn Rush	Candy Shield	Right Handed	Purple Hair	Garlic Spray
Judit	Bishop Diagonal	Candy Shield	Right Handed	Orange Hair	Silver Bell
Fabiano	Rook Slide	Pumpkin Blast	Left Handed	Green Hair	Silver Bell
Beth	Queen Sweep	Cobweb Trap	Right Handed	Purple Hair	Silver Bell
Vishy	Pawn Rush	Candy Shield	Left Handed	Orange Hair	Silver Bell
Hans	Bishop Diagonal	Pumpkin Blast	Right Handed	Green Hair	Garlic Spray
Levon	Pawn Rush	Bat Swarm	Left Handed	Green Hair	Silver Bell
Hikaru	Rook Slide	Candy Shield	Left Handed	Orange Hair	Flashlight Beam
Leinier	Bishop Diagonal	Candy Shield	Right Handed	Green Hair	Silver Bell
Bobby	Rook Slide	Bat Swarm	Right Handed	Green Hair	Silver Bell

Clue 1

Multiplication facts (1-12)

You inspect five equal rows of spooky wooden chess pawns lined up on the table.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

110

121

1 × 4 =T

3 × 10 =M

9 × 1 =B

9 × 9 =H

2 × 6 =W

7 × 4 =L

1 × 2 =A

8 × 7 =E

11 × 9 =U

1 × 5 =I

11 × 4 =S

6 × 11 =D

3 × 7 =O

10 × 11 =V

8 × 12 =N

11 × 11 =R

0/16 letters found

Clue 2

Rounding

The glowing phantom radar gives a fuzzy reading of magical energy that rounds to the nearest hundred.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

4300

300

3000

1700

200

9000

4300

3000

1100

430

700

170

4300

300

3000

1100

2000

300

370

1100

3000

1100

9000

1700

290

Round 4,339 to the nearest hundredW

Round 247 to the nearest hundredS

Round 430 to the nearest tenM

Round 1,749 to the nearest hundredN

Round 9,440 to the nearest thousandA

Round 2,280 to the nearest thousandR

Round 287 to the nearest tenD

Round 368 to the nearest tenG

Round 284 to the nearest hundredI

Round 3,428 to the nearest thousandT

Round 692 to the nearest hundredO

Round 168 to the nearest tenV

Round 28 to the nearest tenE

Round 1,105 to the nearest hundredH

0/14 letters found

Clue 3

Addition

You gather the total count of plastic spider rings and candy corn dropped near the scene.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

5431

5234

3268

5644

2048

2978

4435

4477

2978

5644

5234

2262

9396

8077

2978

2638

2262

7057

2978

2048

3268

5644

5431

3268

2118

1930 + 3501 =A

1159 + 1819 =E

1272 + 1996 =I

2953 + 2691 =L

1084 + 1178 =T

1247 + 871 =N

2985 + 1492 =B

3192 + 3865 =H

1650 + 3584 =S

5493 + 3903 =O

4151 + 3926 =P

2748 + 1687 =R

768 + 1280 =V

1605 + 1033 =D

0/14 letters found

Clue 4

Subtraction

You calculate how many black rooks remain on the board after the phantom attacked.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

1492

4651

2018

7575

3421

3404

2505

5394

7575

3505

4207

6915

2505

4651

7575

8446

3505

5394

8392

7575

6915

3404

3505

8446

6530

6915

5394

3561

5394

4092 - 2600 =F

6502 - 3081 =D

8578 - 1003 =N

9033 - 3639 =E

10325 - 3795 =P

5026 - 1521 =H

4712 - 2207 =R

9875 - 1429 =T

6293 - 2889 =G

8776 - 384 =K

7488 - 2837 =O

5762 - 3744 =U

7537 - 622 =I

8422 - 4215 =A

5676 - 2115 =C

0/15 letters found

Clue 5

Division facts (1-12) — the last clue

You split the captured pumpkin trophies equally among the remaining detective squads.

First solve each problem. Then find each answer in the list below and cross that sentence out. One sentence will be left — that's exactly what the villain did!

Step 1 — solve these

88 ÷ 8 = ?

4 ÷ 1 = ?

6 ÷ 3 = ?

27 ÷ 9 = ?

36 ÷ 3 = ?

90 ÷ 10 = ?

30 ÷ 3 = ?

42 ÷ 7 = ?

14 ÷ 2 = ?

80 ÷ 10 = ?

7 ÷ 7 = ?

Step 2 — cross out the sentence with each answer

1.The villain hopped like a knight, then floated through walls.

2.The villain zipped on diagonals, then raised a candy shield.

3.The villain slid like a rook, then blasted glowing pumpkins.

4.The villain marched like a pawn, then trapped the board in webs.

5.The villain marched like a pawn, then blasted glowing pumpkins.

6.The villain swept across the board, then raised a candy shield.

7.The villain marched like a pawn, then floated through walls.

8.The villain swept across the board, then floated through walls.

9.The villain slid like a rook, then trapped the board in webs.

10.The villain hopped like a knight, then summoned spooky bats.

11.The villain swept across the board, then trapped the board in webs.

12.The villain marched like a pawn, then raised a candy shield.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Haunted Chess Championship

Culprit: Wesley (Pawn Rush · Pumpkin Blast · Right Handed · Green Hair · Silver Bell)

Clue 1 (Multiplication facts (1-12)): "THE VILLAIN DOES NOT USE A BAT SWARM"
1 × 4 = 4 (T) · 3 × 10 = 30 (M) · 9 × 1 = 9 (B) · 9 × 9 = 81 (H) · 2 × 6 = 12 (W) · 7 × 4 = 28 (L) · 1 × 2 = 2 (A) · 8 × 7 = 56 (E) · 11 × 9 = 99 (U) · 1 × 5 = 5 (I) · 11 × 4 = 44 (S) · 6 × 11 = 66 (D) · 3 × 7 = 21 (O) · 10 × 11 = 110 (V) · 8 × 12 = 96 (N) · 11 × 11 = 121 (R)
Clue 2 (Rounding): "WITNESS SAW THEM MOVE WITH RIGHT HAND"
Round 4,339 to the nearest hundred = 4300 (W) · Round 247 to the nearest hundred = 200 (S) · Round 430 to the nearest ten = 430 (M) · Round 1,749 to the nearest hundred = 1700 (N) · Round 9,440 to the nearest thousand = 9000 (A) · Round 2,280 to the nearest thousand = 2000 (R) · Round 287 to the nearest ten = 290 (D) · Round 368 to the nearest ten = 370 (G) · Round 284 to the nearest hundred = 300 (I) · Round 3,428 to the nearest thousand = 3000 (T) · Round 692 to the nearest hundred = 700 (O) · Round 168 to the nearest ten = 170 (V) · Round 28 to the nearest ten = 30 (E) · Round 1,105 to the nearest hundred = 1100 (H)
Clue 3 (Addition): "A SILVER BELL STOPPED THE VILLAIN"
1930 + 3501 = 5431 (A) · 1159 + 1819 = 2978 (E) · 1272 + 1996 = 3268 (I) · 2953 + 2691 = 5644 (L) · 1084 + 1178 = 2262 (T) · 1247 + 871 = 2118 (N) · 2985 + 1492 = 4477 (B) · 3192 + 3865 = 7057 (H) · 1650 + 3584 = 5234 (S) · 5493 + 3903 = 9396 (O) · 4151 + 3926 = 8077 (P) · 2748 + 1687 = 4435 (R) · 768 + 1280 = 2048 (V) · 1605 + 1033 = 2638 (D)
Clue 4 (Subtraction): "FOUND GREEN HAIR ON THE KNIGHT PIECE"
4092 - 2600 = 1492 (F) · 6502 - 3081 = 3421 (D) · 8578 - 1003 = 7575 (N) · 9033 - 3639 = 5394 (E) · 10325 - 3795 = 6530 (P) · 5026 - 1521 = 3505 (H) · 4712 - 2207 = 2505 (R) · 9875 - 1429 = 8446 (T) · 6293 - 2889 = 3404 (G) · 8776 - 384 = 8392 (K) · 7488 - 2837 = 4651 (O) · 5762 - 3744 = 2018 (U) · 7537 - 622 = 6915 (I) · 8422 - 4215 = 4207 (A) · 5676 - 2115 = 3561 (C)
Clue 5 (Division facts (1-12)): surviving statement (box 5) → Wesley
88 ÷ 8 = 11 · 4 ÷ 1 = 4 · 6 ÷ 3 = 2 · 27 ÷ 9 = 3 · 36 ÷ 3 = 12 · 90 ÷ 10 = 9 · 30 ÷ 3 = 10 · 42 ÷ 7 = 6 · 14 ÷ 2 = 7 · 80 ÷ 10 = 8 · 7 ÷ 7 = 1

About this mystery

Grade level: Grade 4 math
Math topics: Multiplication, Rounding, Addition, Subtraction, Division
Reading level: grades 3-4
Theme: The Haunted Chess Championship — set in Spooky Rook Manor
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

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