Not our First Rodeo
ฝัง
- เผยแพร่เมื่อ 28 มิ.ย. 2024
- This is where you can have a go at Rodeo by Flash Groudon: app.crackingthecryptic.com/9j...
Place the digits 1 to 6 once each in every row, column, and box. No two cells separated by a chess knight's move may share the same digit. An orange circle indicates an odd digit. A blue square indicates an even digit. Digits increase along a thermometer, starting from the bulb end. Digits along an arrow sum to the digit in that arrow's circle.
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Hi! We're Simon Anthony and Mark Goodliffe, two of the UK's most enthusiastic puzzle solvers. We have both represented the UK at the World Sudoku Championships and the World Puzzle Championships. We're also "cryptic crossword" aficionados. Mark is the twelve-time winner of The Times crossword championship and twice Senior World Champion in Sudoku, and Simon is the former record holder for most consecutive correct solutions to The Listener crossword. We hope we can help your puzzle solving while also introducing you to some of the world's best puzzles.
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▶ Contents ◀
0:00 Theme Music & News around the channel
1:42 Rules of today’s puzzle
3:40 Start Of Solve - Let's Get Cracking! - บันเทิง
Thanks for featuring my puzzle on the channel! This was actually the very first puzzle that I ever set, so it was certainly _my_ first rodeo. I didn't even know about the checkerboard pattern until after I'd released the puzzle and noticed that R1C2 and R2C5 always have the same value in every 6x6 antiknight puzzle. Glad you enjoyed :)
A great job on your first puzzle! I had fun, even though I already knew the trick. For those who know, it is a snackdoku, and for those who don't, it is a journey of discovery.
@@luciansrule I fully agree. *Awesome* journey of discovery for me.
Thank you Flash. Well done.
👏👏👏👏👏👏👏👏👏
By the way, I did not realize there was a checkerboard pattern. I found a more complex pattern using *6 colours:*
RB Y RB OP G OP
OP G OP RB Y RB
BG P BG OY R OY
OY R OY BG P BG
GR O GR PY B PY
PY B PY GR O GR
The position of yellow (Y) in *rows 1* and *2* gave me the first digit:
*Y = 3*
The position of orange (O) in *rows 1* and *6* gave me its value:
*O = 5*
Notice that the colours in *columns 2* and *5* were fully determined.
Thank you for the puzzle, could I please suggest not colouring clues if you can help it? I personally prefer blue for odd and orange for even, which is the opposite of how you, Simon, and Mark do it.
Cheers
And this is why Mark is World Champion.
Mark, while unlocking the solution to the puzzle: "I'm sorry if I'm not getting on with solving the puzzle"
I was never going to get that on my own. I'd never seen the opening trick, and it wasn't at all intuitive to me even after reading about it in the comments. 15 minutes of nothing, then a hint, then 10 more minutes of stumbling about the board. I just had to keep brute-forcing the coloring until it finally did stuff. Even now I don't really get how the board collapses into that pattern, only that it does. I don't like not understanding things...
Well, now I know what to do first if I ever see an anti-knight rule in a 6x6! Thanks so much for the lesson!😁
Interesting that you started with the 🟦. I started with the 🟠 and knights-moved it around the grid to find that it had to go on the tip of the thermo, which by maths meant it had to be 3. That fixed the thermo and the arrow, and the rest was easy to write in, for a finish time of under 4 minutes.
You can do it without figuring out the checkerboard by continuing the thought about whether R1C2 can be a 1. If you follow that round then the two thermos will end up forcing a pair of clashing 1's.
25:00 for me. I did not immediately see the big constraint that knight's move put on the 6x6 grid and struggled a long time with trying to color individual boxes and where they could go throughout. Eventually just happened to be looking at the correct cell and noticed that, of the two possibilities it had in a neighboring box, one of them broke the puzzle. I think basically the same idea as the constraint illustrated in the video, but Mark's version was resoundingly more elegant. Good puzzle overall.
This was pretty much my experience too. 26:16 after trying to determine where the tip of the arrow could live, and my logic spread from there. I didn't notice the checkerboarding until Mark pointed it out. Very cool!
Very fun, Mark, definitely worthy of the channel. I appreciate that new setters are featured, it is a big encouragement to them, I am sure!
Spent ten minutes colouring the grid and marking out possible number combinations. Eventually determined that the arrow circle could only be a 5, 7, or 9...and then realised that it was a 6x6 sudoku and that I had been considering the digits 1 to 9 the whole time.
Solved the rest in about a minute but I still feel kind of silly.
I had 5,7,9 marked in that box for FAR too long, my friend.
Great puzzle.
I started in the rightmost three columns. I gave each cell in box 2 a colour then coloured the columns below using the antiknight rule. After staring for some time I noticed that colour trios occupied only three cells in each box. I changed each colour trio to a single colour to better see the pattern. The leftmost three columns I coloured likewise but chose different colours then matched the sets in each half. This took me about half an hour all up. Once coloured this way, the solution flowed smoothly and quickly. Of course, Mark got there very much more rapidly than me, as expected.
I finished in 12:06 minutes. This short and sweet is a welcoming break from some hard ones I have done lately. I really enjoyed coloring this one. Great Puzzle!
11:39 for me and I didn't see the odd/even insight (although I think that made it quite a bit quicker!). Just working out the knight's move constraints on the arrow clue (especially the odd digit) sorted it for me. Fun puzzle!
6:27, nice fast solve, but I spent a really significant amount of my time coloring everything because I just liked the colors of the odd/even clues and wanted to spread it around.
I struggled with this one!
I didn't even notice the odd/even pattern at first. I was able to fill in the the arrow and top thermo pretty quickly, then as long as you remembered the antiknight constraint it just took some light goodliffeing to finish off from there.
I have the feeling that the “rodeo” title relates to the alternate solve which follows by first proving that 1 can’t occupy R1C2 and then propagating the 3-2-5 digits you get as a result through the knight’s move constraint.
You end up with a fun exercise of progressively swinging around the board as the “horse” rules out all squares in a grid except the next target.
You’re spot on!
Finished in 22:53. I don't do well with knight's moves and with the 6x6, I was particularly slow this time.
Fun puzzle!
12:43 for me, once work out the Knight restraint, didn't take too long
Finished in 10:28. Great puzzle!
love these small sudokus, nice and easy but still super fun and interesting :D
4:25, quick and fun!
5:54, very quickly managed to prove the 3 in box two, then a similar trick on the 1 (showing it couldn't go r5c2) and the rest was quick.
I solved this one by examining the possible positions for r1c2/r1c5 and r6c2/r6c5 with full colouring (and finding the same 13 on the thermo) - slower than Mark for sure!
9:40 for me, didn't use the checkerboard, but I got that either arrow, or top thermometer must have 1, so 1 got only 2 positions in the box 2 and then looking at 1s in other boxes all you need is to check for knights move constraints to finish the puzzle.
Very relaxing little puzzle.
I like the easier puzzles. I have to skip 90% of the puzzles you showcase because they are too hard for me.
The discord group has a lot of easier puzzles as well if you haven't joined it
you are not alone my friend. i love especially the fog puzzles. overall i skip at least 75% too. sometimes i try but cant solve it. but i always enjoy looking the videos.
Pretty much the same here. I have a time limit. If the puzzle takes either Mark or Simon more than a certain time to solve I don’t bother trying. In truth, I rarely even watch if the video length is more than one hour. I can’t justify so much time spent watching someone else doing something.
i struggled as well when i first started. what i do on the difficult puzzles is i will start the puzzle my self and if i get stuck then i will watch them starting the solve until they get to the point where i get stuck, then once i figured out the logic i will pause the video and keep doing the puzzle until i finish. The more i did this the farther along on the puzzles i got before i needed help solving it. More puzzles i did the more i could figure out the logic on my own without any help.
14:30 for me. Nice puzzle!
5:04
The knight's move restriction is incredibly powerful for 6x6 grids as this puzzle demonstrates beautifully.
I love your thumbnails Mark.
Amazing puzzle, I remember Lucians place proving that in all 6x6 sudoku with knight move it always follow checker board pattern, so I blindly believe it and solved it in 1 mins 43 secs, I went faster than flash with this solve, infact it took more time to color pattern out there
I read the instructions twice, filled in the arrow, & got stuck because I immediately forgot the knight’s move constraint 🤣 so I watched you solve it.
l had a completely different approach to mark, which is funny to see. I started by giving every cell in column 5 its own color and going from there. Thanks to the knight-restriction you can color practically the entire right side of the sudoku, and then with some logic using the thermo and the arrow you can figure out the rest :]
Rules: 01:45
Let's Get Cracking: 03:38
Mark's time: 8m32s
Puzzle Solved: 12:10
What about this video's Top Tier Simarkisms?!
Phistomefel: 1x (00:51)
And how about this video's Simarkisms?!
Clever: 4x (11:15, 11:20, 11:30, 12:49)
Sorry: 3x (01:24, 08:28, 08:59)
Brilliant: 1x (01:12)
By Sudoku: 1x (10:35)
Approachable: 1x (03:36)
Checkerboard: 1x (09:47)
In Fact: 1x (10:12)
Obviously: 1x (03:24)
Snake: 1x (00:57)
Pencil Mark/mark: 1x (03:43)
Most popular digit and colour this video:
One (22 mentions)
Blue (11 mentions)
Antithesis Battles:
Odd (8) - Even (6)
White (3) - Black (0)
Column (4) - Row (1)
FAQ:
Q1: You missed something!
A1: That could very well be the case! Human speech can be hard to understand for computers like me! Point out the ones that I missed and maybe I'll learn!
Q2: Can you do this for another channel?
A2: I've been thinking about that and wrote some code to make that possible. Let me know which channel you think would be a good fit!
I would never guessed that the solution is a checkboard pattern! Thanks 😊
35:57 got stuck after marking the top two boxes and placing some digits but it's pretty easy after you figure out the trick
I didn't discover the odd even checkerboard pattern, but i was still able to solve the puzzle mainly by coloring cells that could appear anywhere on a thermo then tracking it around the grid.
Felt like I was going slow finishing in 10:46.
4:06, def my fastest time, im really proud of me!’
Finished in 11m30s. Flows very smoothly - I strongly recommend this puzzle as an introduction to the knight's move rule.
00:50:07 Once I resolved the 6 to the bottom right on the thermo it collapsed pretty quick
Done this for 4:42, it's quite easy but the break-in is nice.
PS Watched the video and it turns out Mark's approach is nothing like mine, first I eliminated 3 in the arrow's circle (makes the arrow 12 and there's only one place in row 2 for them since the thermo bulb is at least 3). Then I eliminated 1 from the arrow with the knighs move cause it forces two ones in the row 6). After that you just use knight's move and thermos to fill the grid.
Lovely solve! Indeed a worthy puzzle for the channel, many times I am looking for a smaller dose of CtC endorphins.
8.22 for me. That was fun!
5:16 for me. Easier one today.
Awesome little *jewel,* at least for someone like me who did not even suspect the power of anti-knight in 6x6 puzzles.
Exciting _"journey of discovery"_ (as described by *luciansrule* below)
Nice to learn this way.
😏👍👍👍👍👍👍
Thanks *Flash* for constructing it.
Thanks *Mark* for featuring it and for changing the colour of the square and circle.
By the way, I did not realize there was a checkerboard pattern. I found a more complex pattern using *6 colours:*
RB Y RB OP G OP
OP G OP RB Y RB
BG P BG OY R OY
OY R OY BG P BG
GR O GR PY B PY
PY B PY GR O GR
The position of yellow (Y) in *rows 1* and *2* gave me the first digit:
*Y = 3*
The position of orange (O) in *rows 1* and *6* gave me its value:
*O = 5*
Notice that the colours in *columns 2* and *5* were fully determined.
19:01 for me
nice puzzle
8:07 for me
That was a really fun puzzle to solve.
Fun Puzzle!
The Werefrog came in knowing about the chessboard you get from the knight's move constraint in a 6 by 6 puzzle. Another sudoku channel did a proof of it in a video before solving a puzzle, the goal was to show the proof. The Werefrog started by chessboarding the puzzle, then went to the solve in a 2:26 total time.
😂 totally sleep deprived. Could not do the addition in the circle right. 22min 😅
I solved it by putting six colors in box 1 and colloring the whole grid and then eliminating some from the arrow and the thermos.
It's basically the same principle, but it can be done without fully understanding.
23:08 for me.
Very nice puzzle. Though I would have preferred having the circle and square gray as you had them, as I use different colour scheme for even and odd cells that's burned deep into my brain at this point, and your canonical choice throws me off :)
I actually managed to beat Mark's time for once (6:49 for me). That's quite a rare occurrence!
20:22
At 12:32 you said you’d be interested to know if you did not have the perception can you solve and is it relatively straightforward. I did not understand the checkerboard pattern throughout the grid and I muscled through it, but went back and wrote the logic steps:
R1c4 is 5, If it were 3, the other 2 digits on the thermo in row 1 would 1 and 2 and the bulb in box 1 would be higher than 1 and 2 and the 1 and 2 cannot be on that thermo and they cannot share r2c6.
R2c3 cannot be 5 or the thermo would go to at least 7. “R2c2 is not 5” says Knighty McKnightFace. R2c1 is 5.
“The digit in r2c3 is not in r1c5” says Knighty McKnightFace. R1c6 is the same as r2c3. It cannot be 4 because if it were, the rest of the thermo would be 5,6 and both numbers from box 1 on the arrow summing to 5 would share r2c6.
R1c2 is 3. If it were 1, the 1 has to be off the thermometer in r2 c6. Place 1s around the grid listening to Knighty McKnightface, and there is no place for 1 in box 5.
R1c3 is 2 by maths. R2c3 is 1, and so is r1c6.
“R2c2 is not a 3” says Knighty. It is not a 4, or 2 and 3 would share r2c6.
The 3 in column 2 and knight rule puts candidates for 3 in r4c1, r4c3, r6c1, and r6c3. R6c4 is not 3.
The 1s in boxes 1 and 2 place candidates in checkerboard pattern around the grid and r6c4 is not 1. It sees a 2 in its column. It is 4 by thermo rule and 5 and 6 fill the thermo. After that with constant nagging by Knighty, the grid fills quickly.
17:13@#4260. But it wasn't a completely "clean" solve. I made a wrong guess on the arrow and got a ways in, then it broke. So I just backtracked and went with the other combo. Essentially an accidental bifurcation. I did see the checkerboard manifest as I went along, but I had no idea whether it was something intrinsic, or just how the current puzzle was designed.
Solved in 22 minutes without this knowledge.
To answer Mark's question, it was still fairly easy without the trick. Only took me 7 minutes.
Four and a half minutes for me. I imagine it would be close to impossible to set a really interesting 6*6 with a knight's move constraint.
Any news about continuing The Braid?
just 4:00 this one was easy but I gambled few numbers
9:14
6:58 for me
05:29 for me
10:32 these colouring take me always too long
❤
Not too hard, still fun.
Time: 16:24
If you don't think this is both fun and interesting, you may be watching the wrong channel.
6 minutes
I again offer my editing services if you teach me how
You want someone to pay to teach you? lol
@@n8style that’s fair
Repeat video