David Ding

Scion of the Ur-Dragon Reanimator [Primer] - Commander (Scion of the Ur-Dragon) Deck Introduction This deck maximizes the fun you'll have playing with dragons while allowing you to play different dragons each game so that the play pattern isn't all the same and there's always som...

Check out my Primer for my beloved Dragons Deck, featuring Scion of the Ur-Dragon as my commander, on @moxfield.com! 🐉⚔️ #MagicTheGathering
moxfield.com/decks/RVvyL3...

For #ThisWeeksFiddler by @xaqwg.bsky.social, check out my write-up and animation as my best attempt to explain why direction picking doesn't always equate to angle picking, especially when things go 3D.
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Let’s Make a Tic-Tac-Deal! Fiddler on the Proof: October 7, 2025

For #ThisWeeksFiddler by @xaqwg.bsky.social, I did some dice rolling, Monte-Carlo style:

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When Will You Cross Your Path? Fiddler on the Proof: October 2, 2025

For #ThisWeeksFiddler by @xaqwg.bsky.social, I visualized an ant walking. 🐜🚶‍♂️

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Incredible trophy obtained on @mtgarena.com Bloomburrow quick draft! Went 7-2 after a 1-2 start! Never give up 🐭💪#MagicTheGathering

Prime Perfection How Perfect Numbers and Prime Numbers Go Together

Ever wondered how primes and perfect numbers are secretly connected? 🔢✨ Check out my blog ‘Prime Perfection’ and see the magic unfold! #math #numbers

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Thanks Zach! The puzzles you produce are simply too enticing for me 😄

I'm back to solving #ThisWeeksFiddler after taking a break to deal with some personal matters! For this week, I am taking a few risks:

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Also, check out my delicious take on the Basel Problem!
www.davidyding.com/navPages/Basel

@xaqwg.bsky.social

The Delicious Path to the Basel Problem Let's Bake Some Math!

#Math and #Pi
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Back to the #run. 🏃 #5k #exercise

Play the Universal Crossword: Daily crossword puzzle with universal appeal Try your hand at this crossword, known for its, well, universal themes, clues, and answers.

Today’s Universal #Crossword is by me! Please give it a solve! ✏️

www.gocomics.com/puzzles/univ...

Scion of the Ur-Dragon Reanimator - Commander (Scion of the Ur-Dragon) A deck created using Moxfield.

The scion of the urdragon is my absolute favorite! Check out my decklist below on moxfield:

moxfield.com/decks/RVvyL3...

Strands #452
“It's a little buggy”
🟡🔵🔵🔵
🔵🔵🔵🔵

Perfect #strands on @nytgames.bsky.social

100 Perfect #connections from @newyorktimeshaiku.bsky.social games!

3000+ @nytimes.com crosswords and counting! #nytxw

Won my local game store's #Tarkir #Dragonstorm @magic.wizards.com draft on Friday Night 2-0-1 with a mean Mardu deck! Opened up another Ugin in my prize boosters. Full decklist on Moxfield #MagicTheGathering #Dragons 🐉
moxfield.com/decks/dxBGxy...

Just earned another trophy 🏆 drafting #Tarkir #Dragonstorm on @mtgarena.com! Thanks @magic.wizards.com for such a fun set! 🐉🐉🐉 Got it done with Abzan 7-1!

Ugin, Assemble! #MagicTheGathering

Got second place with a 2-1 finish at my local game store’s #Tarkir #Dragonstorm prerelease! Got it done with #Temur midrange! #MagicTheGathering

Teysa Karlov Token Aristocrats - Commander (Teysa Karlov) General Strategy Pump out tokens early to mid game. Finish the game either by going wide or unleashing aristocrats only in the late game. Do not try to start any aristocrats engines in the early game ...

Check out my latest primer on my Teysa Karlov deck on @moxfield.com! This is the latest update with the new inclusion of Elspeth, Storm Slayer from Tarkir Dragonstorm! #MagicTheGathering #Commander #Tarkir

moxfield.com/decks/cTCZXV...

Can You Root for the Underdog? Fiddler on the Proof: March 28, 2025

Full write-up here:
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For #ThisWeeksFiddler by @xaqwg.bsky.social, March Mathness pt. 2 features rooting for the underdog! Full solution will be posted on Monday. #MarchMadness #Math

Awesome original Tarkir block draft at my LGS last night! Went 2-1 and got second in my pod. Perfect prep for next week’s #Tarkir #Dragonstorm prerelease! #MagicTheGathering

Can You Play the Favorite? Fiddler on the Proof: March 21, 2025

For #ThisWeeksFiddler by @xaqwg.bsky.social, we celebrate #MarchMadness with our very own March Mathness! 🏀

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Another 🏆 for #MagicTheGathering #Aetherdrift draft! Went Selesnya this time. ✌️ ☀️ 🌳

Update: exact solution for Extra Credit is up!

I think the main misconception is that it's not the probability of being closer to the diameter greater than 50%, but rather, the y-coordinate of the point chosen being closer to diameter is greater than 50%. However, the y-coordinate alone does not determine the distance to the semicircular beach.

For #ThisWeeksFiddler by @xaqwg.bsky.social, I wrote a special #PiDay #Math blog on finding the shortest distances to semi-circular beaches.

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A Pi Day Puzzle (Pi Day 2025 Special) Fiddler On The Proof: March 14, 2025

I have updated my solution here:
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A Pi Day Puzzle (Pi Day 2025 Special) Fiddler On The Proof: March 14, 2025

Check out my #PiDay 2025 special blog post! It can only be on #math with a delicious serving of pi! Math puzzle courtesy of #FiddlerOnTheProof by @xaqwg.bsky.social.

www.davidyding.com/navPages/PiD...