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Ajò Dimonios
Joined: 01 May 2017 Posts: 339 Location: Sassari Italy
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Posted: Sun Jul 02, 2017 10:10 pm Post subject: very hard III |
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Hi everyone
Code: |
+-------+-------+-------+
| . . . | 6 . . | 7 . . |
| . 8 . | . . 4 | . . . |
| . . . | . 1 3 | 8 . 2 |
+-------+-------+-------+
| . 2 7 | 1 . . | . . 3 |
| 4 . . | . 3 . | . . 8 |
| 6 . . | . . 9 | 1 4 . |
+-------+-------+-------+
| 3 . 2 | 4 6 . | . . . |
| . . . | 3 . . | . 2 . |
| . . 5 | . . 2 | . . . |
+-------+-------+-------+
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Play this puzzle online at the Daily Sudoku site
Ciao a tutti
Paolo |
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JC Van Hay
Joined: 13 Jun 2010 Posts: 494 Location: Charleroi, Belgium
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Posted: Mon Jul 03, 2017 9:46 am Post subject: |
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"Basics" : r5c7=2, r1c9=r4c5=4; 2-Fish{8C34} -> -{8r9c1, 8r8c56}
8L4C1 -> 0 solution; L4C6=8 and "basics" to the end :
Code: | +-------------------------+--------------------+----------------------+
| 1259 1359 139 | 6 2589 58 | 7 1359 4 |
| 12579 8 139(6) | 2579 2579 4 | 3569 13569 1569 |
| 579 4579(6) 9(46) | 579 1 3 | 8 59(6) 2 |
+-------------------------+--------------------+----------------------+
| 59(8) 2 7 | 1 4 5-6(8) | 59(6) 59(6) 3 |
| 4 159 19 | 57 3 567 | 2 579(6) 8 |
| 6 35 3(8) | 2578 2578 9 | 1 4 57 |
+-------------------------+--------------------+----------------------+
| 3 179 2 | 4 6 1578 | 59 15789 1579 |
| 1789 14679 19(468) | 3 579 157 | 4569 2 15679 |
| 179 14679 5 | 789 789 2 | 3469 136789 1679 |
+-------------------------+--------------------+----------------------+ | [8r4c6=8r4c1-8r6c3=HT(468)r238c3-6r3c23=6r3c8-6r45c8=6r4c7]-6r4c6=6r5c6
NP(58)r14c6 -> NP(17)r78c6 -> r8c5=5, NP(89)r9c45 -> r7c8=8; 2-Fish{5C16} -> -{5r1c2}
Code: | +---------------------+-----------------+--------------------+
| 1259 139 139 | 6 289 8(5) | 7 139-5 4 |
| 12579 8 1369 | 2579 279 4 | 3569 13569 1569 |
| 579 45679 469 | 579 1 3 | 8 569 2 |
+---------------------+-----------------+--------------------+
| 589 2 7 | 1 4 8(5) | 69(5) 69(5) 3 |
| 4 159 19 | (57) 3 6 | 2 9(57) 8 |
| 6 35 38 | 2578 278 9 | 1 4 (57) |
+---------------------+-----------------+--------------------+
| 3 179 2 | 4 6 17 | 59 8 1579 |
| 1789 14679 14689 | 3 5 17 | 469 2 1679 |
| 17 1467 5 | 89 89 2 | 346 1367 167 |
+---------------------+-----------------+--------------------+ | 5r5c8=*Wing[5r4c78=*(5-7)r6c9=7r5c8-(7=5)r5c4]-5r4c6=5r1c6 -> NT(139)r1c238
Code: | +-------------------------+---------------+-------------------+
| 25 (139) (139) | 6 28 58 | 7 139 4 |
| 1257(9) 8 369-1 | 2579 279 4 | 3569 13569 1569 |
| 57(9) 45679 469 | 579 1 3 | 8 569 2 |
+-------------------------+---------------+-------------------+
| 58(9) 2 7 | 1 4 58 | 569 569 3 |
| 4 159 (19) | 57 3 6 | 2 579 8 |
| 6 35 (38) | 2578 278 9 | 1 4 57 |
+-------------------------+---------------+-------------------+
| 3 179 2 | 4 6 17 | 59 8 1579 |
| 17(89) 14679 1469(8) | 3 5 17 | 469 2 1679 |
| 17 1467 5 | 89 89 2 | 346 1367 167 |
+-------------------------+---------------+-------------------+
| (19=3)r15c3-(3=8)r6c3-8r8c3=(8-9)r8c1=*Wing[(1=9)r5c3-9r4c1=*9r23c1-(9=13)r1c23] -> -1r2c3
Code: | +-----------------------+-------------------+-----------------------+
| (25) 19(3) 19(3) | 6 28 8(5) | 7 (139) 4 |
| 579(12) 8 69(3) | 2579 279 4 | 3569 3569(1) 569(1) |
| 579 45679 469 | 579 1 3 | 8 (569) 2 |
+-----------------------+-------------------+-----------------------+
| 59-8 2 7 | 1 4 (58) | 569 (569) 3 |
| 4 19(5) 19 | 7(5) 3 6 | 2 79(5) 8 |
| 6 (35) (38) | 257-8 27-8 9 | 1 4 57 |
+-----------------------+-------------------+-----------------------+
| 3 179 2 | 4 6 17 | 59 8 1579 |
| 1789 14679 14689 | 3 5 17 | 469 2 1679 |
| 17 1467 5 | 89 89 2 | 346 1367 167 |
+-----------------------+-------------------+-----------------------+
| 9r1c8=*[(8=3)r6c3-3r12c3=3r1c2-(3=*1)r1c8-1r2c89=(1-2)r2c1=(2-5)r1c1=5r1c6-(5=8)r4c6]
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(9=56)r34c8-5r5c8=*RP[(8=35)r6c23-5r5c2=*5r2c4-(5=8)r4c6] -> -{8r4c1, 8r6c45}; 9 singles
Code: | +-------------------------+-------------+--------------------+
| 2 1(9) 13(9) | 6 8 5 | 7 13(9) 4 |
| 157(9) 8 36-9 | 279 27 4 | 3569 13-569 1569 |
| 57(9) 467-9(5) 46-9 | 79 1 3 | 8 (56-9) 2 |
+-------------------------+-------------+--------------------+
| -5(9) 2 7 | 1 4 8 | 569 (56-9) 3 |
| 4 1(59) 1(9) | 57 3 6 | 2 7-5(9) 8 |
| 6 3 8 | 257 27 9 | 1 4 57 |
+-------------------------+-------------+--------------------+
| 3 179 2 | 4 6 17 | 59 8 1579 |
| 8 14679 1469 | 3 5 17 | 469 2 1679 |
| 17 1467 5 | 8 9 2 | 346 137-6 167 |
+-------------------------+-------------+--------------------+
| 3-Fish{9R15C1} -> -{9r2c3, 9r3c23, 9r234c8}; NP(56)r34c8; 2-Fish{5C28} -> -5r4c1; stte |
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Ajò Dimonios
Joined: 01 May 2017 Posts: 339 Location: Sassari Italy
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Posted: Mon Jul 03, 2017 11:52 am Post subject: |
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Hi everyone
Code: |
+-------------------+----------------+-------------------+
| 1259 1359 139 | 6 2589 58 | 7 1359 4 |
| 12579 8 1369 | 2579 2579 4 | 3569 13569 1569 |
| 579 45679 469 | 579 1 3 | 8 569 2 |
+-------------------+----------------+-------------------+
| 589 2 7 | 1 4 568 | 569 569 3 |
| 4 159 19 | 57 3 567 | 2 5679 8 |
| 6 35 38 | 2578 2578 9 | 1 4 57 |
+-------------------+----------------+-------------------+
| 3 179 2 | 4 6 1578 | 59 15789 1579 |
| 1789 14679 14689 | 3 5789 1578 | 4569 2 15679 |
| 1789 14679 5 | 789 789 2 | 3469 136789 1679 |
+-------------------+----------------+-------------------+
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Play this puzzle online at the Daily Sudoku site
Forcing net R4C1=5 => ( R6C2=3; R4C6=8; R1C5=8; R6C3=8; R7C8=8; R8C1=8; R9C4; R1C6; R1C1=2; R5C6=6; R3C2=5; R8C5=5; R9C5=9)=>(locked candidates) -9R3C8;-9R4C9=>contradiction two 6 in column 8=> -5 R4C1.
Forcing net R4C6=6 => (R4C1=8; R5C8=6; R8C3=8; R6C3=3; R6C9=7)=> (locked candidates) -46R3C2=>contradiction in R3C3 ( 4 and 6 at the same time singles)=>-6R4C6.
Forcing net R4C6=5 =>(R4C1=8; R5C5=6; R8C5=5; R8C3=8; R1C6=8; R5C4=7; R6C3=3; R1C2=3; R3C3=4; R6C9=7; R7C8= 8; R2C5=7; R5C8=5; R6C2=5; R1C1=5; R2C3=6;R3C4=5; R3C8=6; R4C7=6)=> (locked candidates) -29R2C4=> contradiction R2C4=Ø=>-6R4C6=>solution stte.
Code: |
+-------------------+----------------+-------------------+
| 1259 1359 139 | 6 2589 58 | 7 1359 4 |
| 12579 8 1369 | 2579 2579 4 | 3569 13569 1569 |
| 579 45679 469 | 579 1 3 | 8 569 2 |
+-------------------+----------------+-------------------+
| 89 2 7 | 1 4 8 | 569 569 3 |
| 4 159 19 | 57 3 567 | 2 5679 8 |
| 6 35 38 | 2578 2578 9 | 1 4 57 |
+-------------------+----------------+-------------------+
| 3 179 2 | 4 6 1578 | 59 15789 1579 |
| 1789 14679 14689 | 3 5789 1578 | 4569 2 15679 |
| 1789 14679 5 | 789 789 2 | 3469 136789 1679 |
+-------------------+----------------+-------------------+
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Play this puzzle online at the Daily Sudoku site
Ciao a tutti
Paolo |
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Back to top |
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