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Difference between revisions of "Sudoku/Reviews/Systematic Sudoku/Sudokuwiki Ends Nakex 63 On Its Own"

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(Created page with "https://sysudoku.com/2020/02/25/sudokuwiki-ends-nakex-63/ [https://www.sudokuwiki.org/sudoku.htm?bd=20000800000100940000560702004670000080001000300000624009020310000840060000...")
 
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[https://www.sudokuwiki.org/sudoku.htm?bd=200008000001009400005607020046700000800010003000006240090203100008400600000800004 Puzzle in SW Solver] Extreme Grade (550).
 
[https://www.sudokuwiki.org/sudoku.htm?bd=200008000001009400005607020046700000800010003000006240090203100008400600000800004 Puzzle in SW Solver] Extreme Grade (550).
  
After basics, 2-String Kite: 3 in r2c4,r4c1 (connected by r4c5,r6c4) => r2c1<>3
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*After basics, 2-String Kite: 3 in r2c4,r4c1 (connected by r4c5,r6c4) => r2c1<>3
and then another basic.
+
and then another basic. SBN in Gordonian order
  
SBN in Gordonian order r1c3={49}. Mutual eliminations: r89c8<>5,  r9c3<>7.
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*r1c3={49}. Mutual eliminations: r89c8<>5,  r9c3<>7. Impasse.
 +
*r2c4={35}. Mutual elim. r4c1<>9. Impasse.
 +
*r3c2={38}. Impasse. (3 chain extends, 8 totally punk).
 +
*r4c1={35}. 5 chain contradicts (after much extension), so r4c1=3. Easy to the end.

Revision as of 13:10, 30 March 2020

https://sysudoku.com/2020/02/25/sudokuwiki-ends-nakex-63/

Puzzle in SW Solver Extreme Grade (550).

  • After basics, 2-String Kite: 3 in r2c4,r4c1 (connected by r4c5,r6c4) => r2c1<>3

and then another basic. SBN in Gordonian order

  • r1c3={49}. Mutual eliminations: r89c8<>5, r9c3<>7. Impasse.
  • r2c4={35}. Mutual elim. r4c1<>9. Impasse.
  • r3c2={38}. Impasse. (3 chain extends, 8 totally punk).
  • r4c1={35}. 5 chain contradicts (after much extension), so r4c1=3. Easy to the end.