The invariants of grappling
No-gi submission grappling,
grounded in mechanical truth.
InGrappling is the single best free reference for submission grappling. Every technique page is anchored to an invariant — a mechanical law that holds regardless of body type, size, style, or lineage. Not how someone taught it. Why it works.
Position of the day · Tuesday, June 30
Banana Split
The Banana Split is a hip and adductor submission applied from cross ashi / saddle / honey hole. One leg is pushed forward Submission grappling reference.
Invariants this position tests
- INV-S02 The target limb must be isolated from the body
- INV-07 Establishing connection is the prerequisite for all control. Where INV-01 describes what sustained connection achieves, INV-07 describes the prior requirement: control cannot begin until connection exists. Distance — whether created by the opponent deliberately or allowed to develop accidentally — returns initiative to the opponent and must be closed before control can be re-established.
- INV-LE01 Inside space control — maintaining the attacker's hip in the space between their hip and the opponent's hip — prevents the opponent from extracting their leg and determines which submissions are available.
What students miss most
The Banana Split is a hip and adductor submission applied from cross ashi / saddle / honey hole. One leg is pushed forward Submission grappling reference.
Common mistakes are surfaced from the technique's full coverage page.
Invariant of the week · Jun 29 – Jul 5, 2026
INV-10 Space Is Contested — Neither Player Owns the Space They Create
Space that exists between two grapplers is available to whichever player acts on it first. Neither player has exclusive claim to space they create — a frame that creates distance for escape creates the same distance for the opponent's advance. The mechanical consequence is that space is always contested; its creation does not determine its use.
Space in grappling is contested — the player who created it does not own it. Frames that create distance for escape simultaneously create distance for…
Techniques that express this invariant
Space created for escape is simultaneously space created for the opponent's advance — this symmetry is one of the most overlooked mechanical truths in grappling. This week we examine what it means that neither player owns the space they create, and how this shapes strategy from guard recovery to scramble decisions. The hip escape illustrates the contested nature of space: the shrimp creates room for the bottom player to recover guard and creates the same room for the top player to establish knee slide. The mistake is creating space and pausing before occupying it; the opponent acts on the same window.
Built on invariants, not lineage
An invariant is a mechanical truth that holds regardless of who taught the technique. Every page on this site names the invariant it expresses. That's what makes the explanation actually useful.
The Invariants Framework
Greg Souders formalised the application of ecological dynamics to grappling. Every technique page cites the invariant it expresses — the mechanical law that explains why it works, not just that it works.
Read the invariants →Six Submission Hubs
John Danaher's codification of all submissions into six mechanical families — back attacks, leg locks, kimura, armbar, front headlock, triangles — is the organisational spine of all technique content on this site.
Explore the hubs →Scramble Hierarchy
Craig Jones documented the decision order in scrambles: stand up first, then shoot, then turtle. The height/hip height principle. The wrestle-up as primary offensive tool. Chaos has structure.
Standing and scrambles →Centerpiece feature
Every position.
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The ecological approach, invariant-based cuing, and curriculum design.
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High-percentage content by ruleset, competitive meta, and positional maps.
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Safety frameworks, what responsible coaching looks like, and what to expect.
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Leg Entanglements
Position family
The most searched, most poorly documented area in no-gi grappling. Complete coverage from ashi garami to cross ashi, with invariant analysis at every step.
Back Position
Position family
The complete back control system — seatbelt, body triangle, harness, and every finish from each.
Concepts
Conceptual layer
Gripping sequences, range objectives, and dilemmas — the strategic layer that explains how techniques relate to each other. How individual techniques become systems.
The Invariants Index
Reference
Every mechanical truth that underpins technique on this site. The foundational reading.
The Positional Map
Interactive reference
Every position, every transition, every submission threat. Force-directed and filterable.
Tapping Culture
Social dynamics
Why tapping is not weakness, how to build a mat culture where people tap early, and what it means for safety.