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Block Bodhi

BLOCKING

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01 Opening
Block Bodhi beat 1 of 5

The Elder set the board between them mid-game — nine pieces already placed on each side, the sliding phase well underway — and let Bodhi study it in silence.

"There are four almost-mills on this board," the Elder said at last. "Three are yours to worry about. Name them."

Bodhi's eyes moved along the sixteen mill-lines the way another student might read a sentence. An almost-mill, he had learned to see, was any line holding two enemy pieces and one empty point — a threat one slide away from closing. He found them quickly: the opponent's two stones on the top edge needing only the corner; two on the left spoke needing the cross-point; two in the inner ring, a gap between them; and one more, a pair on the bottom that pointed at a filled point.

"That last one," Bodhi said, "isn't a threat. The empty point it needs — there's no enemy piece adjacent that can slide into it this turn. They'd have to spend two moves getting there. It's a phantom."

"Good," said the Elder. "You've done the arithmetic. Most beginners see two enemy stones in a line and panic. They block every pair on the board and lose — not because they blocked wrong, but because they blocked everything, and a player who spends every turn plugging holes never digs a well of his own."

02 Block Bodhi
Block Bodhi beat 2 of 5

Bodhi remembered that lesson in his bones, because he had once been that panicked beginner.

He told the younger students about it plainly. "When I was new, every pair of enemy stones looked like a knife. I'd race around the board dropping pieces onto every gap — this line, that line — feeling very busy and very safe. And I lost every game, slowly and completely, because I never built a single mill of my own. I stopped a dozen threats and captured nothing. Defense that never turns into offense is just a long, tidy way to lose."

The subtext, the older students understood, was not really about morris. It was about the difference between being busy and being effective — between reacting to every alarm and choosing which alarms were real.

03 Block Bodhi
Block Bodhi beat 3 of 5

The genuine skill, Bodhi taught, had three questions, asked in order, before you ever touched a piece.

First: can they actually close this mill on their next turn? Not eventually — this turn. A threat that needs two moves to arrive is not urgent; you have a free tempo to build while they set up. Second: would it hurt if they did? Some mills, even if closed, capture a piece you can spare, or a piece already safe inside a mill of your own. A closing mill that costs you nothing is not worth a defensive turn. Third, and only if the first two were yes: is the blocking point also useful to me? The best block is a piece that denies their line AND sits on one of your own almost-mills — a move that guards and builds in the same breath.

"Block the mill that can close now and would cost you something," Bodhi said, "on a point that also helps you. Let the phantoms go. Every turn you save from blocking a false threat is a turn you can spend closing a mill of your own."

04 Block Bodhi
Block Bodhi beat 4 of 5

The Elder tested him with a cruel little position: two enemy almost-mills, both real, both able to close next turn, and only one Bodhi could block.

Bodhi did not rush. He counted what each closing mill would take. The first would capture a spare piece sitting uselessly in a corner — a piece he'd been meaning to move anyway. The second would capture the keystone of his own swinging setup, the piece that made three of his lines work at once.

"I block the second," Bodhi said, sliding his stone onto the point the enemy needed. "The first mill closes — let it. It takes a piece I don't need. If I'd blocked the first and lost the keystone, I'd have saved a pebble and lost the machine."

"You let a mill close on purpose," the Elder observed.

"I let the cheap one close," Bodhi corrected. "That's not surrender. That's arithmetic. You can't block both, so you block the one that matters and you pay the small bill without flinching."

05 Closing
Block Bodhi beat 5 of 5

Later, watching two younger students play, Bodhi saw the older lesson land in real time.

One of them, anxious, blocked every pair the instant it formed, ran her pieces ragged, and built nothing. The other ignored the phantoms, blocked only the two threats that could truly close, and spent his saved turns quietly assembling a mill of his own. Halfway through, the difference became a chasm — one board all defense and no gain, the other advancing turn by turn.

"See it?" Bodhi murmured to no one in particular. "She's not losing because she blocks badly. She's losing because she can't tell the real threat from the noise, so she treats them all the same. And when everything is urgent, nothing gets built."

He set a fresh board for them afterward and gave them the only rule that had ever mattered to him: before you block, ask whether it can close, whether it would hurt, and whether the block helps you too. If you can answer those three, you'll spend your turns on the threats that are real — and you'll have turns left over to win.

Hear it as an audio drama

A short play starring Block Bodhi, from MillSong. Different voices, same idea. Listen any time after you read.

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Read the drama script
  1. Narrator: From Spark and Anvil and Millsong — this is Block Bodhi, in chapter 1 of the Millsong cast.
  2. Narrator: This drama uses an AI-generated voice. Voiced via Gemini 2.5.
  3. Narrator: Block Bodhi never watched his own pieces. He watched the other player — reading the mill coming before it arrived.
  4. Student: There are enemy pieces in pairs all over the board. I can't block them all — I'm running out of turns!
  5. Block Bodhi: Then don't block them all. That's the trap. When I was young I blocked every pair I saw, and I lost every game, because I built nothing of my own.
  6. Student: But any of those pairs could become a mill!
  7. Block Bodhi: Could it become one this turn? Ask that first. If they'd need two moves to reach the empty point, it's a phantom. Let it go.
  8. Student: This pair on the top edge — they can slide into the gap right now. That one's real.
  9. Block Bodhi: Now the second question. Would it hurt? If the mill closes and captures only a piece you can spare, let even that one go.
  10. Student: And the third question?
  11. Block Bodhi: Does the blocking point also help me? The best block sits on one of your own almost-mills too — it denies them and builds for you in the same breath.
  12. Student: So I block the top edge — it can close now, it would take my keystone, and the point I need also lines up my own mill.
  13. Block Bodhi: A mill you block is a capture that never happens. It's not loud. But games are won as much by the enemy's mills that never closed as by the ones you did.
  14. Student: Can it close now? Would it hurt? Does the block help me? Three questions, then I move.
  15. Narrator: And Bodhi smiled his sideways smile, because the student had stopped panicking at shadows and started reading the board.
  16. Narrator: You've been listening to a Spark and Anvil chapter, written by the Spark and Anvil writing team for ages 9 to 14.
  17. Narrator: Apps stay free forever.
  18. Narrator: Curriculum aligned to Common Core and Next Generation Science Standards.
  19. Narrator: Released under Creative Commons BY-NC-SA 4.0 for educational reuse. Visit Spark and Anvil for the full transcript.

The MillSong ensemble

Block Bodhi is one of the friends in MillSong. Each friend shows you one idea by how they act; meet them all and you have the whole subject.