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Practice
Classic Puzzle - Hard
To start
The Labyrinth
XP
+250 XP
Completed by 6,308 CodinGamers
0
done
Death First Search - Episode 2
Death First Search - Episode 2
XP
+250 XP
Completed by 5,816 CodinGamers
0
done
The Bridge
XP
+375 XP
Completed by 2,800 CodinGamers
0
done
Winamax Sponsored Contest
XP
+250 XP
Completed by 1,486 CodinGamers
0
done
Don't Panic - Episode 2
XP
+250 XP
Completed by 1,220 CodinGamers
0
done
Vox Codei - Episode 1
XP
+250 XP
Completed by 2,010 CodinGamers
0
done
Super Computer
XP
+250 XP
Completed by 4,133 CodinGamers
0
done
Roller Coaster
XP
+375 XP
Completed by 5,610 CodinGamers
0
done
Surface
XP
+250 XP
Completed by 3,982 CodinGamers
0
done
CGX Formatter
XP
+250 XP
Completed by 3,458 CodinGamers
0
done
Power of Thor - Episode 2
XP
+250 XP
Completed by 1,373 CodinGamers
0
done
There is no Spoon - Episode 2
XP
+250 XP
Completed by 1,230 CodinGamers
0
done
The Fall - Episode 2
The Fall - Episode 2
XP
+250 XP
Completed by 1,084 CodinGamers
0
done
TAN Network
XP
+250 XP
Completed by 1,986 CodinGamers
0
done
Genome Sequencing
XP
+250 XP
Completed by 3,359 CodinGamers
0
done
Blunder - Episode 2
Blunder - Episode 2
XP
+250 XP
Completed by 2,835 CodinGamers
0
done
Blunder - Episode 3
Blunder - Episode 3
XP
+250 XP
Completed by 1,773 CodinGamers
0
done
Puzzle of the Week
Let's make a cheap ASCII 3D engine!
by pardouin
Let's make a cheap ASCII 3D engine!
XP
+50 XP
Completed by 78 CodinGamers
0
done
Adversarial Mate with Rook
by aCat
Adversarial Mate with Rook
XP
+50 XP
Completed by 14 CodinGamers
0
done
Can you save the forest - Episode 2
by chabes
Can you save the forest - Episode 2
XP
+50 XP
Completed by 9 CodinGamers
0
done
🃏 FreeCell 🃏
by JBM
🃏 FreeCell 🃏
XP
+50 XP
Completed by 4 CodinGamers
0
done
Conditional probabilities
by nicola
Conditional probabilities
XP
+50 XP
Completed by 11 CodinGamers
0
done
Blockout
by eulerscheZahl
Blockout
XP
+50 XP
Completed by 11 CodinGamers
0
done
Sokoban
by eulerscheZahl
Sokoban
XP
+50 XP
Completed by 91 CodinGamers
0
done
Derivative time !!! - part2
by pluieciel
Derivative time !!! - part2
XP
+50 XP
Completed by 15 CodinGamers
0
done
Kakuro Solver
by Q12
Kakuro Solver
XP
+50 XP
Completed by 57 CodinGamers
0
done
Obsolete Programming
by Zorg1
Obsolete Programming
XP
+50 XP
Completed by 294 CodinGamers
0
done
Nonogram inversor
by LaurentBouvier
Nonogram inversor
XP
+50 XP
Completed by 90 CodinGamers
0
done
Map Colorations
by DPAmar
Map Colorations
XP
+50 XP
Completed by 59 CodinGamers
0
done
The Hidden Fortress
by pardouin
The Hidden Fortress
XP
+50 XP
Completed by 190 CodinGamers
0
done
The Burglar's Dilemna
by [CG]Keelhaul
The Burglar's Dilemna
XP
+50 XP
Completed by 196 CodinGamers
0
done
Takuzu Solver
by vinc-r
Takuzu Solver
XP
+50 XP
Completed by 31 CodinGamers
0
done
Her Majesty's well shared secret
by Niako
Her Majesty's well shared secret
XP
+50 XP
Completed by 81 CodinGamers
0
done
DAWG
by Westicles
DAWG
XP
+50 XP
Completed by 28 CodinGamers
0
done
Einstein's riddle solver
by OroshiX
Einstein's riddle solver
XP
+50 XP
Completed by 173 CodinGamers
0
done
Thomas and the Freight Cars
by java_coffee_cup
Thomas and the Freight Cars
XP
+50 XP
Completed by 214 CodinGamers
0
done
Factorials of primes decomposition
by nicola
Factorials of primes decomposition
XP
+50 XP
Completed by 181 CodinGamers
0
done
Mars Colonization
by java_coffee_cup
Mars Colonization
XP
+50 XP
Completed by 150 CodinGamers
0
done
A Man with a Plan
by undefined
A Man with a Plan
XP
+50 XP
Completed by 52 CodinGamers
0
done
Zergling rush
by ValNykol
Zergling rush
XP
+50 XP
Completed by 574 CodinGamers
0
done
11-puzzle
by [CG]Maxime
11-puzzle
XP
+50 XP
Completed by 107 CodinGamers
0
done
Paper-folding curve
by java_coffee_cup
Paper-folding curve
XP
+50 XP
Completed by 240 CodinGamers
0
done
Chess cavalry
by Arglanir
Chess cavalry
XP
+50 XP
Completed by 647 CodinGamers
0
done
Detective Pikaptcha EP4
by java_coffee_cup
Detective Pikaptcha EP4
XP
+50 XP
Completed by 175 CodinGamers
0
done
Turing machine
by ValNykol
Turing machine
XP
+50 XP
Completed by 636 CodinGamers
0
done
Cryptarithm
by Bob
Cryptarithm
XP
+50 XP
Completed by 371 CodinGamers
0
done
A Game of Go
by Tux4711
A Game of Go
XP
+50 XP
Completed by 192 CodinGamers
0
done
Fractal Carpet
by Sethius
Fractal Carpet
XP
+50 XP
Completed by 367 CodinGamers
0
done
Chess board analyzer
by Di_Masta
Chess board analyzer
XP
+50 XP
Completed by 342 CodinGamers
0
done
Dumbbells solver
by VilBoub
Dumbbells solver
XP
+50 XP
Completed by 118 CodinGamers
0
done
X egg problem
by Romario
X egg problem
XP
+50 XP
Completed by 191 CodinGamers
0
done
Magic count of numbers
by InstouT94
Magic count of numbers
XP
+50 XP
Completed by 344 CodinGamers
0
done
Jump Point Search - Preprocessing
by aCat
Jump Point Search - Preprocessing
XP
+50 XP
Completed by 81 CodinGamers
0
done
Doubly solved Rubik's cube
by icecuber
Doubly solved Rubik's cube
XP
+50 XP
Completed by 51 CodinGamers
0
done
The Empire Enigma
by ReMoD
The Empire Enigma
XP
+50 XP
Completed by 209 CodinGamers
0
done
N Pearls Necklace
by pardouin
N Pearls Necklace
XP
+50 XP
Completed by 11 CodinGamers
0
done
The Total is Right - Weird edition
by Alain-Delpuch
The Total is Right - Weird edition
XP
+50 XP
Completed by 123 CodinGamers
0
done
Apple tree
by input.txt
Apple tree
XP
+50 XP
Completed by 696 CodinGamers
0
done
Gerrymandering
by [CG]MathisHammel
Gerrymandering
XP
+50 XP
Completed by 205 CodinGamers
0
done
The hungry duck - part 2
by schubc
The hungry duck - part 2
XP
+50 XP
Completed by 725 CodinGamers
0
done
Laser and mirrors
by Arglanir
Laser and mirrors
XP
+50 XP
Completed by 328 CodinGamers
0
done
Breakout
by player_one
Breakout
XP
+50 XP
Completed by 78 CodinGamers
0
done
Misère Nim
by magaiti
Misère Nim
XP
+50 XP
Completed by 140 CodinGamers
0
done
Cheat Solving
by JBM
Cheat Solving
XP
+50 XP
Completed by 111 CodinGamers
0
done
The Balanced Centrifuge Problem
by magaiti
The Balanced Centrifuge Problem
XP
+50 XP
Completed by 100 CodinGamers
0
done
Cloudy Weather
by Niako
Cloudy Weather
XP
+50 XP
Completed by 47 CodinGamers
0
done
Max Rect
by java_coffee_cup
Max Rect
XP
+50 XP
Completed by 297 CodinGamers
0
done
Staircases
by sampriti
Staircases
XP
+50 XP
Completed by 354 CodinGamers
0
done
Closest Number
by Nagrarok
Closest Number
XP
+50 XP
Completed by 105 CodinGamers
0
done
Encounter surface
by BLANC
Encounter surface
XP
+50 XP
Completed by 122 CodinGamers
0
done
Neighbor-Sum Grids
by Niako
Neighbor-Sum Grids
XP
+50 XP
Completed by 77 CodinGamers
0
done
Harmless Rooks
by Niako
Harmless Rooks
XP
+50 XP
Completed by 78 CodinGamers
0
done
Binary neural network - Part 1
by player_one
Binary neural network - Part 1
XP
+50 XP
Completed by 160 CodinGamers
0
done
Boggle
by Bob
Boggle
XP
+50 XP
Completed by 494 CodinGamers
0
done
Hitori solver
by VilBoub
Hitori solver
XP
+50 XP
Completed by 113 CodinGamers
0
done
Mini sudoku solver
by nicola
Mini sudoku solver
XP
+50 XP
Completed by 793 CodinGamers
0
done
To Sky's Edge
by [CG]Keelhaul
To Sky's Edge
XP
+50 XP
Completed by 341 CodinGamers
0
done
Vortex
by MadKnight
Vortex
XP
+50 XP
Completed by 387 CodinGamers
0
done
Castle Siege
by TheNinja
Castle Siege
XP
+50 XP
Completed by 304 CodinGamers
0
done
Sliding Maze Puzzle
by pardouin
Sliding Maze Puzzle
XP
+50 XP
Completed by 13 CodinGamers
0
done
Binary Extension
by mouton5000
Binary Extension
XP
+50 XP
Completed by 55 CodinGamers
0
done
Electrical grid
by qsantos
Electrical grid
XP
+50 XP
Completed by 257 CodinGamers
0
done
Flower beds
by Fluxor
Flower beds
XP
+50 XP
Completed by 123 CodinGamers
0
done
Longest Palindrome
by Maurice_Moss
Longest Palindrome
XP
+50 XP
Completed by 723 CodinGamers
0
done
Kolakoski Sequence
by Orabig
Kolakoski Sequence
XP
+50 XP
Completed by 709 CodinGamers
0
done
Binary Permutations
by TheNinja
Binary Permutations
XP
+50 XP
Completed by 290 CodinGamers
0
done
Parsing context-free grammar
by aCat
Parsing context-free grammar
XP
+50 XP
Completed by 106 CodinGamers
0
done
Bailey–Borwein–Plouffe Pi
by Zenoscave
Bailey–Borwein–Plouffe Pi
XP
+50 XP
Completed by 53 CodinGamers
0
done
Maximising integers
by SubwayMan
Maximising integers
XP
+50 XP
Completed by 55 CodinGamers
0
done
Chess moves on FEN position
by scrauler
Chess moves on FEN position
XP
+50 XP
Completed by 292 CodinGamers
0
done
Erdős Number
by Delgan
Erdős Number
XP
+50 XP
Completed by 193 CodinGamers
0
done
Connect four
by Bob
Connect four
XP
+50 XP
Completed by 361 CodinGamers
0
done
Sum of odd
by dwarfie
Sum of odd
XP
+50 XP
Completed by 191 CodinGamers
0
done
Hit the road
by mouton5000
Hit the road
XP
+50 XP
Completed by 186 CodinGamers
0
done
The Holy Grail
by Blem
The Holy Grail
XP
+50 XP
Completed by 472 CodinGamers
0
done
Order of Oopserations!
by Stashio
Order of Oopserations!
XP
+50 XP
Completed by 215 CodinGamers
0
done
The hungry duck - part 1
by schubc
The hungry duck - part 1
XP
+50 XP
Completed by 944 CodinGamers
0
done
Horn-SAT solver
by ludowsky
Horn-SAT solver
XP
+50 XP
Completed by 93 CodinGamers
0
done
Monte Carlo Tree Search exercise
by aCat
Monte Carlo Tree Search exercise
XP
+50 XP
Completed by 178 CodinGamers
0
done
Hill Notation and Hill Order
by btharper
Hill Notation and Hill Order
XP
+50 XP
Completed by 249 CodinGamers
0
done
Execution Circle
by Skreamly
Execution Circle
XP
+50 XP
Completed by 258 CodinGamers
0
done
Spreadsheet Labels
by Porthos3
Spreadsheet Labels
XP
+50 XP
Completed by 635 CodinGamers
0
done
Dominoes solver
by VilBoub
Dominoes solver
XP
+50 XP
Completed by 122 CodinGamers
0
done
Discrete Log Problem
by Maurice_Moss
Discrete Log Problem
XP
+50 XP
Completed by 64 CodinGamers
0
done
SHA-256 Hash
by schachmatt
SHA-256 Hash
XP
+50 XP
Completed by 67 CodinGamers
0
done
Mystery sums
by Neonox
Mystery sums
XP
+50 XP
Completed by 512 CodinGamers
0
done
Pascal Trapezoid
by player_one
Pascal Trapezoid
XP
+50 XP
Completed by 130 CodinGamers
0
done
Elevator
by dimp
Elevator
XP
+50 XP
Completed by 1,069 CodinGamers
0
done
Simple CPU Emulation 1
by SunMan
Simple CPU Emulation 1
XP
+50 XP
Completed by 597 CodinGamers
0
done
The Beautiful sequence
by dogther
The Beautiful sequence
XP
+50 XP
Completed by 229 CodinGamers
0
done
Levenshtein distance
by Steuh
Levenshtein distance
XP
+50 XP
Completed by 519 CodinGamers
0
done
Universe Conquest
by Enygma
Universe Conquest
XP
+50 XP
Completed by 128 CodinGamers
0
done
Google Interview - The Two Egg Problem
by [CG]OlogN
Google Interview - The Two Egg Problem
XP
+50 XP
Completed by 1,898 CodinGamers
0
done
Wave Function Collapse (sans Shannon)
by Wontonimo
Wave Function Collapse (sans Shannon)
XP
+50 XP
Completed by 13 CodinGamers
0
done
Hanoi tower
by Bob
Hanoi tower
XP
+50 XP
Completed by 428 CodinGamers
0
done
Balanced Levers
by java_coffee_cup
Balanced Levers
XP
+50 XP
Completed by 17 CodinGamers
0
done
Jump Point Search - Runtime
by aCat
Jump Point Search - Runtime
XP
+50 XP
Completed by 50 CodinGamers
0
done
Rocket mice
by player_one
Rocket mice
XP
+50 XP
Completed by 89 CodinGamers
0
done
Hangman
by [CPC]glau
Hangman
XP
+50 XP
Completed by 696 CodinGamers
0
done
Simple safecracking
by Shomz
Simple safecracking
XP
+50 XP
Completed by 1,435 CodinGamers
0
done
Legendary Archer Octavius
by UnicornP
Legendary Archer Octavius
XP
+50 XP
Completed by 15 CodinGamers
0
done
TXT2HTML
by Merome
TXT2HTML
XP
+50 XP
Completed by 387 CodinGamers
0
done
KGood
by _NikJ
KGood
XP
+50 XP
Completed by 554 CodinGamers
0
done
Inertia ride
by [CG]Keelhaul
Inertia ride
XP
+50 XP
Completed by 383 CodinGamers
0
done
Candies
by Elliot
Candies
XP
+50 XP
Completed by 559 CodinGamers
0
done
Divisibility of Fibonacci numbers sum
by OPi
Divisibility of Fibonacci numbers sum
XP
+50 XP
Completed by 97 CodinGamers
0
done
n Queens
by VilBoub
n Queens
XP
+50 XP
Completed by 491 CodinGamers
0
done
Alternative vote
by [CG]Maxime
Alternative vote
XP
+50 XP
Completed by 448 CodinGamers
0
done
Code your own Automaton2000, step 1
by Magus
Code your own Automaton2000, step 1
XP
+50 XP
Completed by 161 CodinGamers
0
done
Symbolic system of equations
by izanbf
Symbolic system of equations
XP
+50 XP
Completed by 87 CodinGamers
0
done
The max surface box
by VinceKanabo
The max surface box
XP
+50 XP
Completed by 514 CodinGamers
0
done
Expand the polynomial
by nicola
Expand the polynomial
XP
+50 XP
Completed by 584 CodinGamers
0
done
Drawing Polygons
by PauloVilela
Drawing Polygons
XP
+50 XP
Completed by 391 CodinGamers
0
done
Breaking Apart
by Gorbit99
Breaking Apart
XP
+50 XP
Completed by 41 CodinGamers
0
done
Nuggets numbers
by Thib34
Nuggets numbers
XP
+50 XP
Completed by 224 CodinGamers
0
done
Simplify Selection Ranges
by xmetrix
Simplify Selection Ranges
XP
+50 XP
Completed by 1,827 CodinGamers
0
done
Three little piggies
by nicola
Three little piggies
XP
+50 XP
Completed by 23 CodinGamers
0
done
Highest truncated pyramid
by TwelveOThirteen
Highest truncated pyramid
XP
+50 XP
Completed by 762 CodinGamers
0
done
7-segment display
by scrauler
7-segment display
XP
+50 XP
Completed by 861 CodinGamers
0
done
The Highest Building
by Konrad_Wer
The Highest Building
XP
+50 XP
Completed by 374 CodinGamers
0
done
Disks intersection
by Amendil
Disks intersection
XP
+50 XP
Completed by 325 CodinGamers
0
done
The greatest number
by Magus
The greatest number
XP
+50 XP
Completed by 3,281 CodinGamers
0
done
Tetris
by Bob
Tetris
XP
+50 XP
Completed by 182 CodinGamers
0
done
Timer for Clash of Code
by Lupilum
Timer for Clash of Code
XP
+50 XP
Completed by 677 CodinGamers
0
done
Musical Intervals
by JBM
Musical Intervals
XP
+50 XP
Completed by 121 CodinGamers
0
done
CG's Next Top Model
by Wontonimo
CG's Next Top Model
XP
+50 XP
Completed by 18 CodinGamers
0
done
Egyptian multiplication
by MoonCoder
Egyptian multiplication
XP
+50 XP
Completed by 739 CodinGamers
0
done
Pedestrian Traffic
by tobakudan
Pedestrian Traffic
XP
+50 XP
Completed by 20 CodinGamers
0
done
Wall Street
by MasterJos
Wall Street
XP
+50 XP
Completed by 138 CodinGamers
0
done
Snooker Ball Collision
by Louis700
Snooker Ball Collision
XP
+50 XP
Completed by 21 CodinGamers
0
done
Basic Decision Tree - 1
by Wei-1
Basic Decision Tree - 1
XP
+50 XP
Completed by 76 CodinGamers
0
done
Test before Validate!
by bloublou
Test before Validate!
XP
+50 XP
Completed by 325 CodinGamers
0
done
Big Bang Theory - Sheldon's Array Puzzle
by RaulButuc
Big Bang Theory - Sheldon's Array Puzzle
XP
+50 XP
Completed by 30 CodinGamers
0
done
Basic Decision Tree - 2
by Wei-1
Basic Decision Tree - 2
XP
+50 XP
Completed by 26 CodinGamers
0
done
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