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 · Sunday, September 6
Seated Guard
Seated guard is the foundational open guard — feet active between the passer's knees, head up, hands ready to frame or attack. Submission grappling…
Invariants this position tests
- INV-G01 The bottom player must maintain their feet between or at the line of the top player
- INV-G02 The bottom player
- INV-G05 The bottom player
What students miss most
Seated guard is the foundational open guard — feet active between the passer's knees, head up, hands ready to frame or attack. Submission grappling…
Common mistakes are surfaced from the technique's full coverage page.
Invariant of the week · Aug 31 – Sep 6, 2026
INV-G05 Hip Mobility Is the Guard's Engine
The bottom player's hips must remain mobile. A flattened bottom player cannot generate the movement needed to recover guard, sweep, or attack.
Hip mobility is the mechanical source of every guard action — sweeps, submissions, recoveries, and escapes all originate from hip movement, and a flat…
Techniques that express this invariant
The guard's engine is hip mobility, not grip strength. This week we examine why a flattened bottom player cannot recover, sweep, or attack — and why every guard-specific drill is ultimately a hip-mobility drill. The hip escape is the foundational movement because it restores hip position when the bottom player has been flattened; every other guard technique assumes mobile hips as a precondition. The mistake is responding to a guard pass attempt with grips when the first response should always be hip repositioning.
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.
Every transition.
A force-directed graph of the complete positional landscape of no-gi grappling. See how every position connects to the next — guard to back, standing to leg entanglement, every submission threat mapped to its source. The whole game, in one navigable view.
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For Students
Ability-level guidance, foundational concepts, and a clear learning path.
For Coaches
The ecological approach, invariant-based cuing, and curriculum design.
For School Owners
Curriculum sequences, professional standards, and belt-system alternatives.
For Competitors
High-percentage content by ruleset, competitive meta, and positional maps.
For Parents
Safety frameworks, what responsible coaching looks like, and what to expect.
Begin here
Start exploring
Six entry points into the complete reference.
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.