2‑3‑2‑3 (Inverted)
Guardiola's most radical in-possession innovation: both fullbacks abandon the flank and invert into central midfield, reducing the defensive base to just two centre-backs while flooding every other zone with attackers.
The 2-3-2-3 (Inverted) is the most radical in-possession shape in modern football. Both fullbacks abandon the flanks entirely and invert into central midfield, reducing the defensive base to just two centre-backs. The result is a structure that floods the central zones with bodies while relying on a sweeper-keeper, disciplined centre-backs, and a world-class #6 to contain any counter-attack threat.
The formation exists as a dual identity. Without the ball, it is a conventional 4-3-3 or 4-2-3-1 with all four defenders in their natural positions. The moment possession is won, both fullbacks simultaneously tuck inside and the shape morphs — in the space of two or three passes — into a 2-3-2-3: two centre-backs stretched wide, three central midfielders (two inverted fullbacks + the #6), two half-space runners, and a front three. The transformation is breathtakingly fast and almost impossible for opponents to match.
Pep Guardiola is the architect of this idea. He began experimenting with Philipp Lahm as an inverted midfielder at Bayern Munich (2013–16), but it was at Manchester City that the concept reached full maturity. By the 2022–23 season — the treble campaign — John Stones was effectively playing as a central midfielder from the right-back position, forming a double pivot with Rodri whenever City had the ball. João Cancelo mirrored the role on the left before his departure to Bayern in January 2023. City won the Premier League, Champions League, and FA Cup that season: the most decorated single season in English football history.
"John plays as a midfielder. He goes inside, he plays as a midfielder. That's what he does."
Pep Guardiola · Manchester City press conference, 2022
Guardiola's most trusted pupil, Mikel Arteta, imported the concept to Arsenal. Oleksandr Zinchenko — a natural central midfielder who had spent years playing left-back — became the living embodiment of the inverted fullback role at the Emirates from 2022 onwards. Arsenal's 2022–24 title challenges were built substantially on the shape Zinchenko's movement created: a 2-3-2-3 in possession that gave Arsenal a persistent numerical advantage in the press-resistant central zones. Ben White simultaneously tucked inside from right-back, giving Arsenal an asymmetric version of the full inversion.
Best for: Elite squads with technically exceptional fullbacks who can function as interior midfielders under press, ball-playing centre-backs comfortable holding a high line without cover, a sweeper-keeper (preferably a distributing GK like Ederson), and a world-class defensive midfielder to protect the two CBs. The shape is unforgiving of individual errors — every player must understand their dual role in and out of possession.
Chapter 02 — The inversion
From four at the back to two — the inversion explained
The defining characteristic of the 2-3-2-3 (Inverted) is not where players end up — it is the act of transformation itself. In fewer than three passes from the goalkeeper, a standard four-man defensive line becomes a two-man backline, and a team of eleven becomes an attacking machine with nine players above the halfway line.
When the goalkeeper distributes to a centre-back, the signal is sent. Both fullbacks — who are positioned in their normal defensive wide positions at this moment — begin their inward run. They do not overlap. They do not push forward. They move inward, diagonally through the channels, arriving in the pockets of space between the opponent's midfield line and forward line. Within three seconds, the four-man defence has become a two-man defence.
The 2-3 base
The resulting base structure is built on five players: two centre-backs (spread very wide near each touchline) and three central midfielders. The three midfielders consist of the inverted left-back, the #6 (defensive midfielder), and the inverted right-back. Together these three occupy a horizontal band at the base of the midfield — an incredibly difficult structure to press because any press on the outer two triggers a simple pass to the free #6, and any pressure on the #6 creates a 3v1 for the three players around him.
Why opponents cannot press it
A standard opposition press in a 4-3-3 assigns one forward to the striker, one to each centre-back, and the midfield covers passing lanes. Against the 2-3-2-3 base, this arithmetic breaks down entirely. There are now five players in a zone typically covered by three forwards. Either the opponent's midfield drops to help — vacating space for the two half-space runners — or the press collapses and City/Arsenal play through it easily. There is no clean answer.
The risk-reward calculation
The inversion creates extraordinary attacking possibilities but introduces a structural risk that would make most coaches nervous. With both fullbacks in central midfield, the only players behind the ball are the two centre-backs and the goalkeeper. If possession is lost in a central area before the press can recover the ball, the opponent may have a 3v2 or even a 3v1 against the backline. This is why Rodri — named the 2023 Ballon d'Or winner — was so central to City's success with this shape. His reading of the game meant he could simultaneously anchor the press trigger and cover the space behind if the inversion was exposed.
"The only thing that makes this work is the transition press. You must win it back in three seconds or you're in trouble."
Tactical analysis — Guardiola's City, 2022–23
The shape is, in essence, a massive bet. Every time City gave the ball away in the 2-3 base, the back two were exposed. Guardiola's counter was a ferocious counter-press — City recovered possession within five seconds of losing it more often than any team in Europe during the treble season. The formation only works if the team is relentless in both phases of that transition. Half-commitment results in catastrophic exposure.
Chapter 03 — Build-up
Building from the back
Attack ↑
Short build-up — the inversion triggers within the first three passes.
The build-up in the 2-3-2-3 (Inverted) is triggered from the goalkeeper's first distribution. Ederson at City was the prototype: a goalkeeper comfortable sweeping behind a high line, playing short to centre-backs who have split to the width of the 18-yard box, and serving as the foundation for a 4v1 against the opposition striker in the first press trap.
Step 1 — GK to wide CBs
The two centre-backs split to the widest possible positions, essentially standing at the touchline. This stretches the opposition's first line of press to breaking point. Any forward who commits to one CB leaves the other completely free. The GK forms the apex of a triangle behind, ready to receive a back-pass and switch the attack.
Step 2 — Fullbacks invert, #6 drops
As soon as the CB receives, both fullbacks make their diagonal run inside. The #6 drops between or slightly in front of the two CBs, creating a 3v1 or 3v2 against the lone opposition striker. This makes the press unwinnable — there are always more players than pressers in the first line. The inverted fullbacks arrive in the zones between the opposition's midfield and forward lines, receiving on the half-turn with time to play forward.
Step 3 — The two half-space runners
The two attacking midfielders (AM positions in the 2-3-2-3 shape) position themselves in the half-spaces in the middle third. They act as the link between the 2-3 base and the front three. Think of Kevin De Bruyne on the right and İlkay Gündogan on the left — both comfortable receiving in tight spaces, turning, and either playing the final pass or driving into the box. If one of the inverted fullbacks has moved into a CM position, one of these half-space runners can be the traditional #8.
Direct build-up
Against teams that defend deep and deny the short build-up, the shape has a direct alternative. The wide CBs can switch the ball quickly to the high-wide wingers, bypassing the 2-3 base entirely. This is rare — the formation is designed for possession — but against a low block that denies central progressions, the switch to Erling Haaland as a direct target or the touchline wingers can unlock space quickly.
Chapter 04 — Attacking shape
In the final third
Attack ↑
Attacking shape — nine players above halfway, front five overwhelming the defensive block.
In the final third, the 2-3-2-3 (Inverted) becomes arguably the most aggressive shape in modern football. Nine of the eleven players are operating above the halfway line. Only the two centre-backs remain behind the ball. The result is a front five — two wide forwards, a striker, and two half-space runners — attacking a defence that typically has only four players.
5v4 in the final third
The front five creates a structural 5v4 overload against a standard four-man backline. The two wingers pin the opposition fullbacks wide. The striker occupies both centre-backs. This leaves the two half-space runners (the AMs in the 2-3-2-3 shape) with space to exploit behind the midfield and in front of the defensive line — the most dangerous zone in football. Kevin De Bruyne's ability to arrive late into this space was City's most consistent goal threat.
Half-space overloads
The most lethal combination is the inverted fullback + half-space runner + winger triangle on either side. Three players — the inverted right-back (e.g., John Stones arriving from deep), the right AM (De Bruyne cutting in), and the right winger (Phil Foden) — create a 3v2 against the opposition left-back and left central midfielder. When this overlap fires simultaneously on both sides, there is no defensive answer.
The role of the #6 as quarterback
While everyone else attacks, the #6 (Rodri) remains in the central band, switching the play, regulating tempo, and choosing when to recycle versus when to commit the final pass. This player is the formation's attacking brain as much as its defensive anchor. When City won the treble, Rodri averaged more touches on the ball than any outfield player — he was the fulcrum of everything.
Haaland as the target
The addition of Erling Haaland in 2022-23 added a direct threat the 2-3-2-3 had not previously had. His movement between centre-backs gave the front five a genuine goal threat at the point of the attack. De Bruyne could now choose between the run in behind (Haaland's strength), the cut inside (De Bruyne's own shot), or the short layoff into the half-space. The multi-option attacking structure made City nearly unstoppable in open play.
Chapter 05 — Defensive shape
Out of possession
Attack ↑
Defensive shape — reverts to 4-3-3; both fullbacks sprint back to their wide defensive positions.
The 2-3-2-3 (Inverted) is not a defensive formation — it is designed exclusively for dominating possession. Its defensive organisation depends on one core principle: the shape must never exist out of possession. The moment the ball is lost, both inverted fullbacks sprint back to wide defensive positions, immediately re-establishing the 4-3-3 defensive block.
The transition — the formation's most vulnerable moment
The one to three seconds immediately after losing possession are the most dangerous moments in this system. Both fullbacks are in central positions, the two CBs are spread wide, and the opposition may have space to counter. City under Guardiola trained specifically to minimise this window. Their counter-press was among the most intense in European football — the philosophy being that winning the ball back within five seconds eliminates the counter-attack threat before it can develop.
Rodri — the defensive spine
In the defensive transition, Rodri was the single most important player. His role was to read when possession would be lost before it happened — positioning himself to either win the second ball or block the counter-attack lane. When he was suspended for City's 2023 Champions League final against Inter Milan, City used a different structure entirely; with him available, they were largely untouchable. No single player in modern football has been more central to a formation's viability.
Sweeper-keeper as third centre-back
With only two outfield defenders behind the ball, the goalkeeper must function as a third centre-back. Ederson at City averaged far more sweeping actions per 90 minutes than any other elite goalkeeper — rushing off his line to deal with balls in behind the high defensive line. His distribution quality also turned the goalkeeper position into an offensive role: Ederson routinely played as the spare man in the build-up, recycling possession and driving attacks forward from goal-kicks.
High defensive line
The formation requires a very high defensive line. With only two CBs, defending deep would invite opponents into the space between the defensive line and midfield. Instead, the CBs maintain a line at or above the halfway line during build-up, compressing the pitch and using the offside trap aggressively. This demands centre-backs who are genuinely quick — Nathan Aké and Manuel Akanji's pace allowed City to maintain this aggressive defensive line without being routinely beaten in behind.
Chapter 06 — Per position
What to coach each role
Every player in this formation carries a dual identity — one role out of possession, a completely different role in possession. Coach each player to understand both and to transition between them instantly.
Spotlighting in the build-up animation.
01
GK
Sweeper-Keeper
This is not a shot-stopper role — it is a sweeper-keeper role in the truest sense. Must be comfortable distributing under pressure to the wide-split CBs, playing as the extra man in the build-up triangle, and sweeping aggressively behind the high line. Ederson is the archetype: 190 cm, excellent with both feet, decisive off his line. Without a goalkeeper of this profile, the entire system is compromised.
Fix first
Sitting on the goal line during build-up. Cue: step to 35 metres from goal when team has possession — you are the spare man in the first line.
02
CB
Ball-Carrying Left Centre-Back
In possession this CB splits to the left touchline, receiving at wide angles and driving forward if the press doesn't engage. Must be comfortable carrying the ball 30-40 metres and switching play to the far CB. Out of possession, holds a very high defensive line and must win 1v1s against fast forwards — Nathan Aké and Rúben Dias are the models. Left-footedness preferred to keep the ball on the natural side when split wide.
Fix first
Staying central instead of splitting wide. Cue: when the GK has the ball, make your split run to the touchline immediately — force the opposition press to stretch.
03
CB
Ball-Carrying Right Centre-Back
Mirrors the left CB's role on the right side. In the 2022-23 City setup, John Stones often vacated this position to invert into midfield, meaning Manuel Akanji or Aymeric Laporte would step in as the right CB. Requires pace to defend a high line and the composure to play into tight spaces. When Stones inverted, this CB essentially became a right-back in defensive terms — covering wide right as well as central.
Fix first
Dropping too deep when the team has possession. Cue: your defensive line should be at or above the halfway line when we're building — compress the pitch, don't gift them space.
04
CM
Inverted Left-Back
The left fullback position in the default 4-3-3, but the most transformed role in this system. In possession, this player is a central midfielder — receiving in the left half-space between the opponent's midfield and forward lines, opening body to play forward, arriving late into the box. Zinchenko (Arsenal) and Cancelo (City) defined the archetype. Must have excellent technique under press, spatial awareness of a midfielder, and the tactical intelligence to know exactly when to invert.
Fix first
Inverting too early before the CB receives the ball. Cue: wait for the GK-to-CB pass — that is your trigger. Too early and you alert the opposition press to cover your zone.
05
CM
Anchor — The Lynchpin
The most important player in the formation. The #6 must simultaneously be the base of the attacking triangle and the emergency cover for the two CBs. When the fullbacks invert, this player drops between the CBs or sits just in front, acting as the third defender and the first passer. Rodri — Ballon d'Or 2023 — defines this role: supreme positional reading, 95% pass accuracy, and the authority to dictate tempo. Without a player of this calibre, the system is dangerously exposed.
Fix first
Moving too high when the inverted FBs are forward. Cue: your depth is determined by the fullbacks' position — the further they are forward, the deeper you sit.
06
CM
Inverted Right-Back
The right fullback who inverts to mirror the left-back's role. In the famous John Stones interpretation, this player was originally a centre-back — giving City a double CB pairing in midfield when needed, or using Stones' reading of the game to cancel opposition counter-attacks before they developed. Kyle Walker also played this role in certain games, using his pace to recover if caught high. The role requires a player who is confident in tight central areas.
Fix first
Drifting wide instead of making the central run. Cue: your target receiving position is between their #8 and #6 — not on the touchline. Let the winger own the wide channel.
07
AM
Left Half-Space Runner
Operates in the left half-space in the middle third and final third. In possession, this player links the 2-3 base to the front three, arriving late into the penalty area from deep runs. Gündogan and Bernardo Silva took turns in this role at City — both excellent at playing one-twos in tight spaces, reading the moment to arrive in the box, and pressing at high intensity. Must be willing to track back and press aggressively when possession is lost.
Fix first
Staying static between the lines. Cue: movement is your weapon — constantly offer angles to the base players and time your run into the box for when the ball enters the wide channel.
08
AM
Right Half-Space Runner
Mirrors the left AM in the right half-space. Kevin De Bruyne owned this role in City's peak years — his ability to receive on the half-turn, drive at defenders, and produce assist-or-goal moments from this zone made him the world's best midfielder. The right AM must be comfortable arriving into the six-yard box from 30 metres away, essentially acting as a second striker on the move. Ødegaard fills an equivalent role in Arteta's Arsenal.
Fix first
Receiving with back to goal and holding the ball. Cue: receive on the half-turn always — your first touch should set you facing forward. If you're facing the wrong way, you've already lost the tempo.
09
LW
Wide Left Anchor
Unlike the inverted wingers in a classic 4-3-3, the left winger in this shape is often asked to stay wide and provide a touchline option that pins the opposition right-back. With the left-back already inverted into midfield, the winger cannot also cut inside — someone must hold width. Jack Grealish and Leroy Sané played this role: wide, threatening in 1v1s, crossing, and pressing back on the right-back to prevent easy outlets.
Fix first
Cutting inside too early. Cue: your job is to keep the opposition RB honest — stay wide until the ball enters the central zones, then time your run inside to arrive in the box.
10
ST
Central Threat
The striker operates as the apex of the front three, stretching the opposition centre-backs to create space for the half-space runners. Haaland's arrival in 2022-23 gave this role a direct goal-scoring dimension that completed the shape: his penalty area movement forced CBs to stay deep, gifting De Bruyne acres of space in behind them. A false nine (Firmino-style) is an alternative — dropping to receive and creating space in behind for the AMs to attack.
Fix first
Dropping too deep and cluttering the half-spaces. Cue: your zone is the penalty area and the space immediately in front of it. If the AMs are high, you stay high — competition for space in the box is good.
11
RW
Inverted Right Winger
The right winger typically inverts in this system, cutting inside onto the left foot to create goal-scoring opportunities — while the non-inverting left winger holds width. Phil Foden is the model: able to operate inside or wide, combining with De Bruyne in the half-space, arriving in the box to finish. Saka at Arsenal fills a similar role. The inverted right winger must be the most technically complete of the two wingers — more demands are placed on this player's off-ball movement.
Fix first
Hugging the touchline when the ball is central. Cue: when the ball is in the central zone between the lines, you should be drifting inside — your arrival in the box must be timed to receive the cut-back or through ball.
Chapter 07 — Strengths & weaknesses
What it gives, what it costs
Strengths
Unpressable build-up structure. The 2-3 base creates a numerical superiority in the first press trap that no conventional pressing system can solve. A 4-3-3 high press faces a 5-player build-up structure — there are always more passers than pressers. Manchester City routinely invited City's opponents to press and then played through them with ease.
Nine attacking players above the halfway line. With only two CBs as the defensive foundation, nine outfield players are available to attack. This creates constant numerical threats in every zone of the pitch simultaneously — the opposition defence must account for wingers, inverted FBs, half-space runners, and the striker at the same time. No backline of four can adequately cover all these threats.
Front five structural overload in the final third. Five players attack four defenders. The 5v4 overload means that even with perfect defensive shape, there is always at least one attacker in a favourable position. The combination of Haaland in the box, De Bruyne in the half-space, and a winger in behind creates multiple goal-scoring threats from a single possession sequence.
Dual identity confuses opponents in transition. Because the shape looks like a standard 4-3-3 out of possession but transforms immediately in possession, opponents' defensive preparation is complicated. They must prepare for two entirely different structures within the same 90 minutes. The mental load of tracking the inverted FBs — who could be anywhere from their defensive position to inside the penalty area — was a key advantage for City.
Fullbacks protected from counter-attacks down the flank. Paradoxically, because the fullbacks are centrally positioned rather than overlapping on the flank, they are not exposed to the classic counter-attack scenario of a winger running in behind an advanced fullback. The flanks are defended by the CBs when City lose possession, and the inversion means the traditional weak point of an attacking fullback is eliminated.
Weaknesses
Two CBs catastrophically exposed against quick transitions. If possession is lost during the inversion and the counter-press fails, the opposition faces only two defenders and a sweeper-keeper. A pacey forward partnership exploiting the space behind the high line can be terminal. This exposure is the formation's existential risk — it requires a world-class #6 and a world-class sweeper-keeper to manage it.
Requires an extremely rare player profile at fullback. Zinchenko, Cancelo, John Stones — players who can genuinely function as central midfielders under pressure. This is not a role that can be filled by a standard attacking fullback or a converted winger. The number of players in world football who can execute this role at the highest level is extremely small, making the system difficult to implement for most clubs.
Completely reliant on the #6's reading of the game. Rodri's Ballon d'Or was not incidental — without a player of his intelligence and positional awareness, the system breaks down. The #6 must simultaneously be a passer, a ball-winner, an emergency defender, and a tempo controller. This level of all-round excellence is not replicable without a generational player. City's drop-off without Rodri (knee injury, 2024-25) was dramatic.
High cognitive and physical demands on every player. Players must memorise and execute two entirely different positional sets depending on whether the team has the ball. The transitions between these shapes happen within two to three seconds. Coaching this system requires months of tactical repetition, extremely high baseline technical quality, and players with the footballing intelligence to read the game in both phases simultaneously.
Chapter 08 — Famous teams
Teams that used this shape
Manchester City
Guardiola · 2022–23 Treble Season
The definitive 2-3-2-3 team. John Stones played as an inverted right-back tucking into central midfield alongside Rodri; João Cancelo mirrored the role on the left until his January 2023 departure. City won the Premier League, Champions League, and FA Cup — the first English treble in 25 years. De Bruyne, Haaland, Foden, Gündogan, and Bernardo Silva completed the most complete attacking structure in Premier League history. Rodri was named in the PFA Team of the Year and later won the 2023 Ballon d'Or.
Arsenal
Arteta · 2022–24 Title Challenges
Arteta's Arsenal were the most direct inheritors of Guardiola's inverted fullback philosophy. Oleksandr Zinchenko — signed from City in 2022 — was explicitly described by Arteta as playing an 'interior' role, functioning as a left-central midfielder in possession rather than a traditional left-back. Ben White simultaneously tucked inside from right-back. Arsenal went 49 games unbeaten at home across 2022-24 and came within two points of the title in 2023 and 2024, their best Premier League finishes since Wenger.
Bayern Munich
Guardiola · 2013–16
The laboratory where Guardiola first tested the inverted fullback concept at elite level. Philipp Lahm — one of the most intelligent players in football history — was repositioned from right-back to central midfielder in possession, creating the prototype for everything that followed. David Alaba also inverted from left-back into the interior. Bayern won the Bundesliga in all three Guardiola seasons and reached two Champions League semi-finals, though the full 2-3-2-3 shape wasn't yet as developed as City's later iterations.
Feyenoord
Arne Slot · 2021–23
Before joining Liverpool in 2024, Arne Slot used similar inversion principles at Feyenoord. His teams weren't implementing the full 2-3-2-3 but used one inverted fullback combined with a CDM in a fluid shape that shared the same DNA. Feyenoord won the Eredivisie in 2022-23 — their first title in six years — playing attractive, possession-based football. At Liverpool, Slot made Trent Alexander-Arnold's interior right-back role the centrepiece of his build-up structure, directly descending from the same Guardiola-influenced tactical lineage.
Liverpool
Arne Slot · 2024–25
Slot's Liverpool in 2024-25 refined the inverted fullback concept with Trent Alexander-Arnold in the key interior role from right-back. Alexander-Arnold, one of the best passers in world football, became even more dangerous in a central role — switching play, threading passes through lines, and operating as a de facto attacking midfielder. Liverpool led the Premier League for much of the season, with Slot's possession-dominant style directly descended from the Guardiola tactical lineage.
Chapter 09 — FAQ
Quick answers
What is the 2-3-2-3 (Inverted) formation?
The 2-3-2-3 (Inverted) is an in-possession shape where both fullbacks abandon the flanks and invert into central midfield. This leaves only two centre-backs as the defensive foundation while creating a three-man central midfield base (two inverted fullbacks + the #6), two half-space runners, and a conventional front three. The result is nine players operating above the halfway line when the team has possession. Out of possession, the team reverts to a standard 4-3-3. The shape was perfected by Pep Guardiola's Manchester City during the 2022-23 treble season.
Who invented the 2-3-2-3 (Inverted)?
Pep Guardiola is the primary architect. He began experimenting with the concept at Bayern Munich (2013-16) using Philipp Lahm as an inverted central midfielder from right-back. The system reached full maturity at Manchester City in 2022-23, with John Stones and João Cancelo inverting from right and left-back respectively. Mikel Arteta — Guardiola's former assistant — independently developed a similar system at Arsenal using Oleksandr Zinchenko in the interior left-back role.
What are the key strengths of the 2-3-2-3 (Inverted)?
The formation creates an unpressable build-up structure — the 2-3 base of five players always outnumbers any conventional first press. It generates a structural 5v4 overload in the final third, flooding the opposition defence with more attackers than they can mark. It also eliminates the classic vulnerability of advanced fullbacks being exposed on counter-attacks, because the fullbacks are not on the flanks — they are centrally positioned.
What are the weaknesses of the 2-3-2-3 (Inverted)?
The formation leaves only two outfield defenders behind the ball, creating potentially catastrophic exposure against fast transitions if the counter-press fails. It demands an extremely rare player profile at fullback — someone who can genuinely function as a central midfielder under pressure — and a world-class #6 who can both anchor the build-up and cover for the inverted fullbacks simultaneously. The cognitive and physical demands are among the highest of any system in modern football.
How does the 2-3-2-3 differ from the 4-3-3 (Inverted Fullbacks)?
In the 4-3-3 (Inverted Fullbacks), typically only one fullback inverts while the other holds width or overlaps, creating a 3-2-4-1 shape in possession — three at the back, a double pivot, and four attackers. The 2-3-2-3 (Inverted) takes it further: both fullbacks invert simultaneously, removing all four defenders from their conventional positions and creating a far more extreme attacking structure. The 4-3-3 (Inverted Fullbacks) is an accessible starting point; the 2-3-2-3 (Inverted) is the maximum expression of the concept.
Can this formation work at amateur or youth level?
The full 2-3-2-3 (Inverted) as Guardiola implements it requires months of tactical preparation and players with very high technical and cognitive baselines — it is not realistic for most amateur or youth teams. However, the underlying principles — one inverted fullback, an anchor #6, and half-space runners — can be introduced progressively. Start with a 4-3-3 where one fullback inverts when the team has possession, building the players' understanding of the concept before attempting the full double inversion.