| 36 | Valid Sudoku | — | Medium | ArrayHash TableMatrix | 62% | |
| 37 | Sudoku Solver | — | Hard | ArrayHash TableBacktracking | 64% | |
| 48 | Rotate Image | — | Medium | ArrayMathMatrix | 78% | |
| 54 | Spiral Matrix | — | Medium | ArrayMatrixSimulation | 54% | |
| 59 | Spiral Matrix II | — | Medium | ArrayMatrixSimulation | 73% | |
| 63 | Unique Paths II | — | Medium | ArrayDynamic ProgrammingMatrix | 43% | |
| 64 | Minimum Path Sum | — | Medium | ArrayDynamic ProgrammingMatrix | 66% | |
| 73 | Set Matrix Zeroes | — | Medium | ArrayHash TableMatrix | 60% | |
| 74 | Search a 2D Matrix | — | Medium | ArrayBinary SearchMatrix | 52% | |
| 79 | Word Search | — | Medium | ArrayStringBacktracking | 45% | |
| 85 | Maximal Rectangle | — | Hard | ArrayDynamic ProgrammingStack | 53% | |
| 130 | Surrounded Regions | — | Medium | ArrayDepth-First SearchBreadth-First Search | 43% | |
| 174 | Dungeon Game | — | Hard | ArrayDynamic ProgrammingMatrix | 39% | |
| 200 | Number of Islands | — | Medium | ArrayDepth-First SearchBreadth-First Search | 62% | |
| 212 | Word Search II | — | Hard | ArrayStringBacktracking | 37% | |
| 221 | Maximal Square | — | Medium | ArrayDynamic ProgrammingMatrix | 49% | |
| 240 | Search a 2D Matrix II | — | Medium | ArrayBinary SearchDivide and Conquer | 55% | |
| 286 | Walls and Gates | — | Medium | ArrayBreadth-First SearchMatrix | 63% | |
| 289 | Game of Life | — | Medium | ArrayMatrixSimulation | 71% | |
| 304 | Range Sum Query 2D - Immutable | — | Medium | ArrayDesignMatrix | 56% | |
| 329 | Longest Increasing Path in a Matrix | — | Hard | ArrayDynamic ProgrammingDepth-First Search | 55% | |
| 363 | Max Sum of Rectangle No Larger Than Kread | — | Hard | ArrayBinary SearchMatrix | 45% | |
| 378 | Kth Smallest Element in a Sorted Matrix | — | Medium | ArrayBinary SearchSorting | 63% | |
| 407 | Trapping Rain Water II | — | Hard | ArrayBreadth-First SearchHeap (Priority Queue) | 59% | |
| 417 | Pacific Atlantic Water Flow | — | Medium | ArrayDepth-First SearchBreadth-First Search | 57% | |
| 419 | Battleships in a Board | — | Medium | ArrayDepth-First SearchMatrix | 76% | |
| 427 | Construct Quad Tree | — | Medium | ArrayDivide and ConquerTree | 77% | |
| 463 | Island Perimeter | — | Easy | ArrayDepth-First SearchBreadth-First Search | 73% | |
| 498 | Diagonal Traverse | — | Medium | ArrayMatrixSimulation | 63% | |
| 529 | Minesweeper | — | Medium | ArrayDepth-First SearchBreadth-First Search | 68% | |
| 542 | 01 Matrix | — | Medium | ArrayDynamic ProgrammingBreadth-First Search | 51% | |
| 566 | Reshape the Matrix | — | Easy | ArrayMatrixSimulation | 64% | |
| 661 | Image Smoother | — | Easy | ArrayMatrix | 68% | |
| 675 | Cut Off Trees for Golf Event | — | Hard | ArrayBreadth-First SearchHeap (Priority Queue) | 35% | |
| 695 | Max Area of Island | — | Medium | ArrayDepth-First SearchBreadth-First Search | 73% | |
| 733 | Flood Fill | — | Easy | ArrayDepth-First SearchBreadth-First Search | 66% | |
| 741 | Cherry Pickup | — | Hard | ArrayDynamic ProgrammingMatrix | 38% | |
| 749 | Contain Virus | — | Hard | ArrayDepth-First SearchBreadth-First Search | 52% | |
| 766 | Toeplitz Matrix | — | Easy | ArrayMatrix | 69% | |
| 773 | Sliding Puzzleread | — | Hard | ArrayDynamic ProgrammingBacktracking | 73% | |
| 778 | Swim in Rising Water | — | Hard | ArrayBinary SearchDepth-First Search | 63% | |
| 782 | Transform to Chessboard | — | Hard | ArrayMathBit Manipulation | 50% | |
| 794 | Valid Tic-Tac-Toe State | — | Medium | ArrayMatrix | 35% | |
| 803 | Bricks Falling When Hit | — | Hard | ArrayUnion FindMatrix | 36% | |
| 807 | Max Increase to Keep City Skyline | — | Medium | ArrayGreedyMatrix | 86% | |
| 827 | Making A Large Island | — | Hard | ArrayDepth-First SearchBreadth-First Search | 55% | |
| 832 | Flipping an Image | — | Easy | ArrayTwo PointersBit Manipulation | 83% | |
| 835 | Image Overlap | — | Medium | ArrayMatrix | 64% | |
| 840 | Magic Squares In Grid | — | Medium | ArrayHash TableMath | 52% | |
| 861 | Score After Flipping Matrix | — | Medium | ArrayGreedyBit Manipulation | 80% | |