LinkedIn 6x6 Sudoku #215 Pro-Tips Speed-Run

LinkedIn 6x6 Sudoku #215: Speed-Run Pro-Tips

Drop into #215 with eyes on the givens: R1 packs 3-1-4 in cols 3-5-6, R3 slams 5-3-1-4-2 across 1-5, and scattered hits like R2C1=5, R4C2=4. This 6x6 beast starts fast but jams mid-solve. Here's your tactical breakdown to blast through.

Opening Salvos: Naked Singles and Quick Fills

Hit rows first. R3 nearly full screams R3C6=6 - only spot left, box-clean. Boom, top-right box locks. Chain it: scan col6 for 6's block, nail R6C6=5 via row6 elimination (1-2-3-4-6 placed elsewhere). R1C6=4 given forces R5C6=3 (col6 singles out).

Columns next. Col1: 5 in R3 pins R1C1=2 (hidden single, dodging R5C1). Col2: 3-4-6 stack leaves R1C2=5, R6C2=2. You're filling 20% in 30 seconds.

Cross-Hatching Mastery in 6x6 Boxes

6x6 shifts to **2x3 boxes** - tighter nets. For 6 in bottom-left box (rows4-6, cols1-3): row4 col1 empty but col1 blocks 6 (R5C1 hunts); slash across rows. Row4: 4 in C2 kills C1=6. Row5: 6 given C2. Row6: col3 open but col3 has R1=3? Wait, propagate: only R6C3=4 fits post-fills. Cross-hatch number-by-box: hunt 1's in mid-right box, eliminate row/col intersects. Pins R4C6=1 fast.

The Jam: Difficult Row 4 and Hidden Singles

Mid-game stall hits Row4 - empties in C1,C3,C5,C6 after partials. Candidates tangle: C1 hunts 1-5, but box/row clash. Don't guess. Pivot to hidden singles: in col5, 1-3-5 placed (R1=1,R3=2? Wait R3C5=2, R1C5=1), screams R4C5=5 (only 5 fits col5 row4 box).

Domino: R4C5=5 unlocks col3 - R4C3=2 (row4 now pins it), then R1C3=3 given but wait, given! Propagation floods.

Crucial Square: R3C6, The Crack-Point

R3C6 is your crucial square. That naked 6 post-R3 scan ripples: locks col6 (4-3-2-1-5 placed), forces box3 2's position, cascades to R1C4=6 via col4 elimination. Suddenly, Row1 completes 2,5,3,6,1,4. From here, box scanning pairs hit R2 like 4,1,6,5,3,2.

Pro-move: after R3C6, re-cross-hatch 4's in cols 3-4. Col3: R1=3,R3=1,R4=2,R6=? Pins R5C3=5. Boom, mid-left box cracks, Row5 flows 1,6,5,2,4,3.

Endgame Speed: Pairs and Box Locks

Last push: naked pairs in Row6 col4-5 (1,6) eliminate elsewhere. Bottom-right box: 3-2-4-1-6-5 slots perfectly. Total solve: logical chain, no backtrack. Time it under 90 seconds next run.

Drill this on #215: givens bait the jam, but R3C6 cross-hatch unleashes the flood. Sharp scanning wins 6x6 every time. Hit replay, shave seconds.