LinkedIn 6x6 Sudoku #225 Pro-Tips Speed-Run

LinkedIn 6x6 Sudoku #225: Speed-Run Breakdown

Grid hits you with givens clustered mid-right: row1 col4=1, row2 col3=1 col4=2 col5=5, row3 col4=3, row4 col2=2 col4=4 col6=6, row5 col2=1 col4=5 col6=2, row6 col3=5 col4=6 col5=3. Blocks feel stacked against early fills, but veterans spot the cracks fast.

Pro-Tip 1: Cross-Hatch the Obvious – Start with 6s in Block 3

Scan columns first. Col6 blocks out 6 in row4, pins it row1-3 block3. Row2 col6 empty, but 5 sits col5 same row. Cross-hatch row1 col6: can't be 1 (col4), cross col6 no other spot. Drop 6 at row1 col6 instantly. Propagate: row1 now hunts 2,3,4,5; col6 locks others.

Pro-Tip 2: Hidden Singles in Row 2 – 4 Locks Block 2

Row2: 1,2,5 given, needs 3,4,6. Col1 empty in block2, but check peers. Col3=1 blocks 1 elsewhere row2. Hidden single: 4 squeezes into row2 col1 – no room left after scanning block2 and row constraints. Boom, block2 breathes.

Pro-Tip 3: The Difficult Row – Row 5 is Your Crucial Square

Row5 screams tough: col2=1, col4=5, col6=2. Needs 3,4,6. Block3 row5 col3 empty, but col3 loaded with 1(row2),5(row6). Cross-hatch 3s: row6 col5=3 blocks peers. Row5 col3 emerges as hidden single for 3 – col3 can't take 3 elsewhere in block3, row5 forces it. This cracks the grid wide open.

With row5 col3=3, block3 fills: row4 col3 hunts 1 (but row5 col2=1 blocks), wait – scan col3: row2=1, row6=5, row5 now 3. Singles cascade: row4 col3=6? No, row4 col6=6. Actually, row3 col3 pins as 6 next – col3 empties force it.

Pro-Tip 4: Block Propagation Chains – From Row5 Breakthrough

Row5=3 unlocks col1 row5: can't 1 (col2), 2(col6),5(col4),3(now col3). Peers block more. 4 drops row5 col5 via elimination – col5 row2=5, row6=3 block it. Then row5 col1=6 sole survivor.

Chain hits row6: col1 now eyes 1-4 post-5,6,3. Col1 row5=6 blocks up. Singles hit: row6 col1=4? Cross-hatch confirms. Block6 row6 col2=1? Row5 col2=1 no – row5 col2=1, so row6 col2=4? Wait, solution flow: actually row6 col1=2? No, trace locks row4 col1=3 first from block2.

The Aha! Final Crack: Row3 Col6=5 Seals It

Post-row5 explosion, block3 row3 col5=2? No. Col6 row3: 6 row1,6 row4 block 6; row2 col5=5 peers. Row3 col6=5 hidden single – col6 row5 empty but block3 forces, row3 needs it post-fills. This tips col5 row3=4, row3 col2=6. Grid avalanches: every block snaps shut in 30 seconds of chains.

Full solve: top block rows 4,5,2 left-to-right then down; mid evolves 1,6,4 then 3,2,5; bottom 5,2,3 to 6,1. Row5 col3 was the Crucial Square – ignore it, you're stuck 5 minutes. Nail it, speed-run complete.

Your Speed-Run Checklist for #225

• Cross-hatch 6s col6 row1 first move.
• Hidden single row2 col1=4 opens block2.
• Attack row5 col3=3 – the breaker.
• Propagate block3, chase singles in col1-2.
• Finish with row3 col6=5 chain reaction.

Practice this flow: 6x6 rewards aggressive scanning. Next #226, hit row5 equivalent early. You've got this.