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Log in| Search found 497 matches |
| Author | Message |
|---|---|
 Topic: Chicago Tribune 8/4/17 |
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| JC Van Hay Replies: 6 Views: 38478 |
 Forum: Other puzzles Posted: Tue Oct 31, 2017 9:15 pm Subject: Chicago Tribune 8/4/17 |
| 5r1c1 -> 1 solution
8r1c1 -> 0 solution An optimized interpretation : +-----------------+-------------------+--------------------+ | 5-8 17 2 | (48) 6 5(4) | 1 ... |
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| Topic: VH++101317 |
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| JC Van Hay Replies: 2 Views: 24864 |
Forum: Other puzzles Posted: Mon Oct 30, 2017 12:17 am Subject: VH++101317 |
| 9 singles
Skyscraper{2C36} -> -{2r9c1, 2r8c45}; 2 singles Claiming{6C3} -> -{6r23c1, 6r12c2} Jellyfish{6R25C16} -> -{6r39c8, 6r9c7} Pointing{7B9} -> -{7r1c9}; 2 singles Claiming{8C4} ... |
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| Topic: Can you spot the next move? |
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| JC Van Hay Replies: 4 Views: 34176 |
Forum: Other puzzles Posted: Fri Oct 13, 2017 9:21 am Subject: Can you spot the next move? |
| 1. Sudoku rule : a candidate for a digit d missing from all the valid solutions of the digit d is excluded.
+----------------------+-----------------+--------------------+ | 19 3 59 | 7 ... |
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| Topic: Bonus VH for 101017 |
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| JC Van Hay Replies: 3 Views: 26343 |
Forum: Other puzzles Posted: Tue Oct 10, 2017 12:48 pm Subject: Bonus VH for 101017 |
| B6 -> 1 unique solution :
+--------------------+---------------+------------------+ | 19 12 7 | 8 4 5 | 239 6 23 | | 589 2568 268 | 26 7 3 | 29 1 4 ... |
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| Topic: very hard VIIi |
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| JC Van Hay Replies: 2 Views: 20219 |
Forum: Other puzzles Posted: Thu Aug 31, 2017 7:59 pm Subject: very hard VIIi |
| 3 singles; HP(18)r47c6; LC(5B8, 6B2)
+-----------------------+----------------+-----------------------+ | -6(34) 9(34) 169(4) | 7 8 9(3) | 169 2 5 ... |
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| Topic: very hard VII |
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| JC Van Hay Replies: 2 Views: 19819 |
Forum: Other puzzles Posted: Mon Aug 28, 2017 9:33 am Subject: very hard VII |
| +-------------------+--------------------+------------------+
| 78(9) 2 5789 | 1589 3 1459 | 6 78 145 | | 378 1 3578 | 58 2568 56(24) | 5(4) ... |
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| Topic: sett.sudoku 18082017 |
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| JC Van Hay Replies: 1 Views: 17879 |
Forum: Other puzzles Posted: Sat Aug 26, 2017 8:27 am Subject: sett.sudoku 18082017 |
| 2L2C4 + (58)L4C4 -> 0 solution; L2C1=2 and stte | |
| Topic: Aug 23 VH |
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| JC Van Hay Replies: 15 Views: 78352 |
Forum: Daily Sudoku puzzles Posted: Wed Aug 23, 2017 8:30 am Subject: Aug 23 VH |
r3c8=r8c5=8  |
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| Topic: Aug 23 VH |
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| JC Van Hay Replies: 15 Views: 78352 |
Forum: Daily Sudoku puzzles Posted: Wed Aug 23, 2017 5:51 am Subject: Aug 23 VH |
| Only 1r7c2 [1r3c9] belongs [doesn't belong] to all the solutions of the 1s; stte
Interpretation : Grouped Kite {1R2, 1C9} -> -1r9c1; r7c2=1 and stte [Skyscraper {1C57} -> -1r3c9] |
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| Topic: very hard VI |
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| JC Van Hay Replies: 2 Views: 19817 |
Forum: Other puzzles Posted: Mon Aug 21, 2017 8:30 pm Subject: very hard VI |
| 8 singles; exclusions by the solutions of the 3s, the 5s and C2
+-------------------------+-------------------+-------------------+ | 2 56 89 | 7 159 159 | 1389 3468 1489 ... |
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| Topic: very extreme I |
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| JC Van Hay Replies: 2 Views: 21928 |
Forum: Other puzzles Posted: Thu Aug 17, 2017 5:22 pm Subject: very extreme I |
| The following Symmetric Pigeonhole Matrix :
+---------------------+-----------------------+------------------------+ | 25678 2689 2789 | 3579 (589) 1 | 2357-6 4 (367& ... |
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| Topic: sett.sudoku 12082017 |
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| JC Van Hay Replies: 3 Views: 23830 |
Forum: Other puzzles Posted: Mon Aug 14, 2017 12:15 pm Subject: sett.sudoku 12082017 |
| SSTS to the end :
Basics : 11 singles; X-Wing(3R15) -> -{3r9c5, 3r3c8}; Grouped Kite(8R1C9) -> -{8r9c5}; r9c5=6 XY-Wing(348)r58c5,r6c4 -> -{8r9c4}; stte |
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| Topic: VH+081017 |
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| JC Van Hay Replies: 11 Views: 53718 |
Forum: Other puzzles Posted: Sat Aug 12, 2017 3:05 pm Subject: VH+081017 |
| Hi Paolo, to avoid any confusion, here is my definition of basics :
Basics : application of the Sudoku puzzle "basic" rule : a candidate is (placed/excluded) if it (belongs/doesn't belong ... |
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| Topic: VH+081017 |
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| JC Van Hay Replies: 11 Views: 53718 |
Forum: Other puzzles Posted: Sat Aug 12, 2017 12:30 pm Subject: VH+081017 |
| Hi Paolo,
In my solution, I optimized the rational basics, otherwise they would lead to 7 singles ! JC |
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| Topic: VH+081017 |
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| JC Van Hay Replies: 11 Views: 53718 |
Forum: Other puzzles Posted: Sat Aug 12, 2017 10:21 am Subject: Re: VH+801017 |
| (4=175)r7c469 - (5=6)r7c3 - (6=4)r1c123, r2c23 - (4)r2c5 = (4)r3c4 - (4)r7c4 (a loop) => - 4 r7c2, r89c4; stteHi Clement,
Interesting loop, however 1. your hyper-condensed Eureka notation doe ... |
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| Topic: VH+081017 |
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| JC Van Hay Replies: 11 Views: 53718 |
Forum: Other puzzles Posted: Thu Aug 10, 2017 10:29 pm Subject: VH+081017 |
| 3 singles; exclusions by the solutions of the 4s, C1; 1 single
+---------------------+-----------------------+-----------------------+ | 13 1378 38 | 5 6 1237 | 4 1237 ... |
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| Topic: very hard V |
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| JC Van Hay Replies: 3 Views: 24150 |
Forum: Other puzzles Posted: Thu Aug 10, 2017 4:01 pm Subject: very hard V |
| 8 singles
Exclusions by the solutions of the 2s, 4s Exclusions by the solutions of B9, R8; 4 singles 6r2c7 -> 0 solution via the exclusions by the solutions of the 9s, C8 and the 1s; 5 singles ... |
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| Topic: sett.sudoku 04082017 |
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| JC Van Hay Replies: 11 Views: 49889 |
Forum: Other puzzles Posted: Tue Aug 08, 2017 4:25 pm Subject: sett.sudoku 04082017 |
| Hi Paolo,
Using your constraints in step 2, one can write the following mixed block matrix : |2r46c7 2r5c8| |2r3c2 2r5c2| 2r8c2 &2r8c5 4r8c5 & & ... |
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| Topic: sett.sudoku 04082017 |
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| JC Van Hay Replies: 11 Views: 49889 |
Forum: Other puzzles Posted: Mon Aug 07, 2017 11:45 pm Subject: sett.sudoku 04082017 |
| Hi Paolo,
your step 2 : the solutions of your 5 constraints {(24)r28c5, 2C2B26} effectively exclude {2r3c7, 2r8c2}. To wit : 2r2c5 -> 2r3c2 , while 4r2c5 -> 2r8c2, EmptyRectangle(2C2, 2B6). T ... |
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| Topic: sett.sudoku 04082017 |
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| JC Van Hay Replies: 11 Views: 49889 |
Forum: Other puzzles Posted: Mon Aug 07, 2017 7:08 pm Subject: sett.sudoku 04082017 |
| Hi Paolo,
your step 6 is included in step 2; step 8 is to be corrected, for example : {8C3, 6R2, (62)r4c1, 2C7} -> -8r6c7; step 10 : r1c8=2. JC |
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