MQ’s DB Resources

A comprhensive collection of MQ’s DB technique videos, clinics, and articles.

Much like MQ’s Link Book, this blog post has everything you need to implement Quarters coverage and understand the WHY behind how to teach it (and put it in your scheme). Starting with a brand new Quick Hits on the Slide technique and ending with a mini-clinic on what a safety “step-off” looks like, this page has everything you need. As more content is added to the main site pertaining to this topic I will add links here. So bookmark and enjoy!

MQ Quick Hits Ep. 8 – The Slide Technique

The latest edition of Quick Hits discusses the use of the slide (also known as a shuffle) technique. Used from an open stance, the slide technique is an essential technique for DBs that play in Quarters or off-man coverage schemes. The technique allows the DB to read his triangle (WR to QB) and easily flip his hips on vertical routes. Below the video are other resources on the topic that MQ has produced. The design of this “vlog” article is to be a “bookmark” resource for DB coaches.

Continue reading “MQ’s DB Resources”

5 Tips For Blitzing From The Secondary

MQ discusses 5 things to remember when blitzing from the secondary.

Utilizing the secondary in blitz packages is one of the most underutilized tools in a defensive coordinator’s toolbox. As many DC’s will point out, blitzing from the secondary will expose the defense to man-to-man coverage, but if used correctly (and in the right situations) a secondary blitz can hit home. When offenses create pass protection schemes they use the box numbers in front of them to divvy out responsibilities. Whether it is Big-on-Big (BOB), slide, or zone protection, the secondary is rarely accounted for in pass pro. Knowing this, and utilizing the secondary in pressure packages, can give the defense an added advantage and lead to QB pressures or sacks.

Using the secondary near the box is not only for the pass. Much like pass pro, some offenses do not account for the secondary in the box. This can be used to the defense’s advantage. Putting a secondary player near the box and knowing he will not be accounted for is an automatic win for the defense. The use of “trapping” the secondary near the box can also be used to confuse “check-with-me” teams. By placing a secondary player near the line of scrimmage (LOS), the offense must decide if the defense is blitzing or will drop the player back into coverage. By utilizing the secondary in pressure packages a DC can create a simple confusing alignment that offenses have to respect. If done right, using the secondary to leverage the boundary can add to the box numbers without spinning to single-high and exposing the defense to verticals down the seam (or a LB guarding a speedy slot WR).

Below, MQ explains 5 things to remember when blitzing from the secondary:  Continue reading “5 Tips For Blitzing From The Secondary”

Defending 11 Personnel from a 3-4

How to adjust to TE sets without a natural adjuster.

Spread and Pro-Style offenses utilize a Tight End versus three-down defenses because the defense lacks a natural adjuster. Unlike a four-down defense that can distribute their anchor points evenly across the formation, the 3-4 lacks the extra lineman to defend the extra gap (hence the name “Odd Front”). When faced with an 11 personnel formation, many 3-4 defensive coordinators choose to spin to single-high coverage to gain an extra man in the box. Another adjustment for many DCs in this situation is to attach the outside linebacker to the TE’s side. With the loss of a coverage man and overhang, the DC is forced to spin. When defending an 11 pers. offense from a 4-2-5 or 4-3, these little adjustments aren’t needed because the anchor points are evenly distributed and don’t need to be created.

In a four-down scheme, the defensive ends act as the walls of the box. When a TE is introduced into the formation, the DE to the TE’s side moves to a 9 technique (unless it is Trey and then he is in a 7 or 6i). The four defensive lineman allow the defense to stay even and adjust with the linebackers and secondary. The evenness of the four-down is why many spread teams attack 4-2-5 and 4-3 defenses from 20 pers., utilizing an H-back. In 20 pers., the offense can use the “H” to attack either side of the defense, reading the overhangs to determine what play to run. If the “H” was attached to the formation (TE) he would lose his two-way go.

Defending 11 pers. formations from a 3-4 boil down to understanding how certain fronts react to the extra gap. From a single-gap fit 3-4, a defense can easily adjust to TE sets and stay within a two-shell scheme. The lack of an adjuster is an issue, which is why many 3-4 teams that face the spread, and Pro-Style spread, choose to defend from an Okie Front because it reacts much like the four-down Under Front. Using the offense’s formations as a guide, it is easy to build simple rules within the defense, setting the strength and when to attach the OLBs, to alleviate the issues seen in many 3-4 defenses. Combining an Okie Front with a match quarters scheme can adapt and flex with any formation an offense throws out, it just boils down to how a DC chooses to line up.

Continue reading “Defending 11 Personnel from a 3-4”

Cautious Aggression

Defensive schemes to combat spread offenses.

Introducing MQ’s first full-length book, Cautious Aggression: Defending Modern Football.

.98 Cover Pic

Buy it on immediately on CreateSpaceAmazon, and Kindle. Click the provider below and order your copy today (Links open in new window).

| CreateSpace | Amazon | Kindle |

Description: As the spread becomes more of the norm in all regions of this country it is important for coaches everywhere to have a resource for defending the modern spread offense. Cautious Aggression: Defending Modern Football is that resource for coaches. The schemes described in this book are tried and true methods for defending some of the best offenses this country has ever seen.

Starting with “The Why” and ending with “The How.” Cautious Aggression gives coaches a defensive philosophy they can trust. Using diagrams and concise explanations, the book lays out a formula for success for coaches to utilize in their own schemes. Below are the chapters:

  1. Argument for Two-High
  2. Defending the Modern Spread Offense
  3. Defending Run/Pass Options
  4. Systematic Creativity of a Quarters Defense
  5. The Art of Match Quarters
  6. All About the Cover Down
  7. Designing a Modern Defense
  8. Setting the Strength
  9. Defending Formations into the Boundary
  10. Defending Motions

Coaching at the lower levels of football bring its own issues to the table that many Division I football teams do not face. Cautious Aggression: Defending Modern Football is written for all coaches. The experiences Coach Alexander gained while coaching for Baylor Football combined with his experiences at the high school level has given him a unique perspective on defensive football. Many of the concepts and theories in this book have been adjusted to fit the needs of high school and small college coaches around the country. Come learn “The Art of X.”


Thank you to all that support the site, this book would not be possible without you.

-Cody Alexander

Episode #1 — MQ Quick Hits :: Quarters Clinic

A 5 minute video on the “Art of X.”

Introducing MQ Quick Hits. Episode #1.

This week MatchQuarters discusses Quarters install, in particular, Press Quarters.

Continue reading “Episode #1 — MQ Quick Hits :: Quarters Clinic”

Defending Trips – Special Coverage

If the offense won’t throw to #1, lock him up and reduce the field.

When defending a team that runs Trips it is important for the defense to have multiple coverage options. Depending on how an offense chooses to attack a defense the selection of the right coverage can be crucial. Being able to switch from base coverage to base coverage allows the defense to keep the offense on its toes. If a defense only runs one base coverage against Trips, offenses will quickly find a way to exploit it. This fact alone should encourage a defensive staff to carry multiple coverages into a game and be able to use them when the opportunity arises.

Many times offenses use the #1 receiver as a decoy or chooses to run him off to create a void so the #2 or #3 WR can run an out route into space. One way to counteract the nonuse of #1 and outs by #2 or #3 is to run Special Coverage. Unlike Stress where the Sam is blind to what the #3 WR is doing, Special eliminates the #1 completely and reduces the field. The Sam takes on the responsibility of a Two-Read CB. His eyes are squarely on #2 and will carry the vertical of #2 if the offense runs vertical routes. Like Stress, the key player is the Sam linebacker and his ability to run with a vertical route. Eliminating #1 puts the Sam on an island with #2. As stated earlier, having options in coverage is important to defending the spread. A defense must be able to adapt to any situations and adjust to any formation/scheme thrown at it.  Continue reading “Defending Trips – Special Coverage”

Defending Trips – Stress Coverage

Most HS QB’s can’t throw the 25 yard Comeback. So make’em.

Defense is reactionary by nature. The offense knows the play and the defense must be structured enough to counteract and defend. Outside of forcing the offense’s hand through pressure, a defense must play on the law of averages and use the tendencies of the offense against them. For most high school offense the #1 wide receiver in a Trips set rarely gets the ball, and when he does it usually comes by way of an underneath route or a sprint out by the offense. Few high school QB’s can make the 25-yard comeback throw from the opposite hash. The few that can make the throw must execute the long throw which can tend to hang in the air long enough for a good corner to react to it. Plus, most high school offenses won’t run a four vertical play and attack the #1 WR to the Trips side. Usually, it is the #2 on a bender or the “X” WR to the boundary (especially if the defense is “kicking” to the three WR side). Using the law of averages can give the defense an advantage and protect itself from the backside fade and a “solo-ed” CB.

Defending Trips is about sectioning off the formation and forcing a weak armed QB to make a long throw. Some defensive coaches turn to Special coverage against Trips because the #1 WR rarely gets the ball. In Special, the CB will lock on the #1 WR and the defense runs a Two Read scheme by bracketing the #2 and #3 WRs. This allows the Sam to move to outside leverage of the #2 and drive on any out routes. The #3 WR bracketed by the Mike underneath and the field safety (Cover Safety – CS). There are several issues when Special is the base defense against Trips. One, the coverages is susceptible against crossing routes by the #1 and #2 WRs. Since the CB is locked on the #1 WR he must follow him everywhere he goes (MEG coverage). Offenses can easily use rub and pick routes to wall off the CB and knock off the Sam. Another issue with Special is the vertical of #2. Since the Sam is outside leveraged, and the CS is holding the inside of the #3 WR, it is easy for the offense to use a four vert scheme to attack the coverage. Most teams will run the #3 WR on an “over” route to the opposite hash allowing the #2 WR to bend into the middle of the field (MOF) creating a window and a relatively easy throw for any QB. By alignment, the Sam is beat to the inside and must work outside-in to get hands on the WR. Special is great when teams are running out routes with #2 and #3 and is a coverage all two-high defenses need in their repertoire. If teams are attacking vertically, Stress is best.  Continue reading “Defending Trips – Stress Coverage”

Defending the Spread From a 3-4

Running an Okie Front to defend the modern spread attack.

Defensive linemen are at a premium. For many teams, it is hard to field a deep roster that can lend itself to a four-man front. Running parallel to the defensive dilemma of lineman depth is the popularity of the spread. A natural conclusion for many defensive coordinators around the country has been a shift away from a four-down front and into a 3-4 scheme. The flexibility of the 3-4 and the added athlete on the field makes the scheme spread friendly. The multiplicity within the scheme allows DCs to attack the offense from multiple directions without sacrificing pass distributions. Running a two-high scheme behind a three-man front meshes well with teams that have a history of running a 4-2-5 or 4-3.

The Okie Front, in particular, can be of service when defensive coaches are looking to defend the spread from a three down front. With a 5 technique, a shaded Nose, and a 3 tech. (or 4i) to the weak side, the Okie’s anchor points fit the spread much like its four down sister, the Under Front. To the weak side, the Jack linebacker (boundary OLB) is technically a wide “9” in the run fits and controls the edge of the box to the boundary. The Jack LB, in particular, is useful when defending offenses that like to attack the boundary through the air. Even though the Jack is technically a conflicted player (he is responsible for the “C” gap), his alignment allows him to read the offensive tackle and slow play the run. In most four down fronts, the boundary OLB (Will) is the “fold” player and is considered conflicted because his gap is in the box. The Okie Front eliminates the fold and replaces it with a loose overhang (much like a natural Will/DE exchange in a four down front). Continue reading “Defending the Spread From a 3-4”

Post-AFCA Grab Bag

The Convention, this week’s FAQ, & tips for installing Quarters.

AFCA Convention ::

The AFCA Convention is always a great time. For me, it is a time that I get to see old friends, meet some new, and just hang out with like-minded people. Football has always been an important part of my life. The Convention is awesome because it allows me to give back to my dad who has been a selfless coach his whole adult life. There’s nothing more special than showing my dad around, talking football with him all day and letting him meet people he otherwise would never meet (for instance RC Slocum). Many go to look for new opportunities to move up, but keep in mind, if you consistently chase the cheese could become blind to a great opportunity. This profession is built on relationships. As you walk the halls of the Convention you will see every type of coach, but don’t be the guy looking through the person you are talking to so you can get to a “more important” person. When I was ending my GA experience at Baylor, Coach Bennett reminded me, “The people we meet going up are the same as we meet going down.” Treat everyone with respect, because you never know when they may help you out. For most of us, we all start as GAs or interns (It took me a whole calendar year, and some luck, to get paid at Baylor!).

The Convention makes everyone equal as well. There is no other place in this sport where the head coach at a Power 5 school will rub shoulders with a brand new high school coach, but that is the beauty of the Convention. It is a truly special place where football coaches can come and be around like minded men. If you have never been it is truly an awesome experience. I would encourage any young coach to go and just walk around, sit in some sessions, and learn something new. It is important that coaches stick together. The age-old saying “iron sharpens iron” is true, and for this profession to continue to flourish in a society that devalues the sport we must raise each other up. [FYI – Next year’s session is in Charlotte, NC]  Continue reading “Post-AFCA Grab Bag”

MQ’s Link Book | #ArtofX

Find everything you need in one place.

MatchQuarters.com’s Philosophy of Football

** Each link will open in a new window, so bookmark this page and get to reading!**

Go deeper into defending the spread with MQ’s Book:

Cautious Aggression: Defending Modern Football

Description | Buy it now

:: Connect With MQ ::

–         Twitter          –          YouTube          –          Instagram         –

Defending the Spread

Run Fits

  1. Zero the Mike (Belly-Key)
  2. Using Natural Gap Exchanges in Your Front Seven
  3.  Line Twists to Combat Heavy Zone Teams
  4. Defending the Zone Read
  5. Defending the Power Read
  6. Defending Split Zone
  7. 5 Tips for Defending Spread Option Teams
  8. Defending BAsh (“Back Away”) Concepts
  9. Defending 20p Two-Back Power

Defensive Structure/Special Coverages/Dime Package

  1. Structuring Your Defense – The Front
  2. Running Dime as Your Base
  3. Defending the Air Raid with “Steal” Coverage
  4. “Read” Coverage (20p Field Robber)
  5. MQ’s Simple 3-Down Dime Package

Quick or “Pop” Motions

  1. Defending Jet Motion
  2. Defending A-Behind and Flare Motion

Defending Spread Formations (10 Pers.)

  1. Defending 10p 2×2 Pistol
  2. Defending Stack and Bunch Sets
  3. Defending Trips/Empty:
    1. Why You Should Run an Under Front to 3×1 Sets
    2. Defending Trips — Fitting the Run
    3. Top Trips Coverages Explained
    4. Specific Split Field Trips Coverages:
      1. Defending Trips with Stress Coverage
      2. Defending Trips with Special Coverage
      3. Defending 3×1 Formations with Solo Coverage
    5. Defending Empty and Quads
  4. Defending Pro Spread (11p)
    1. 11 Personnel (Pro Spread)
    2. Defending single-width or “nub” formations
  5. Defending the Spread’s Top Unbalanced Sets

Defending RPOs ::

  1. RPO Stop Calls
  2. Using Split-Field Coverage to Counteract RPO & Check-With-Me Offenses

Defending Formations/Personnel Groups

  1. 12 Personnel (Ace/Ace Trey)
  2. 20 Personnel — Over vs Under (Setting the Strength)
  3. 21 Personnel (Defending Power Football From a Hybrid Defense)
  4. 30 Personnel
  5. Defending the Wing-T

Stop Calls/Pressures/Blitzes

  1. 5 Tips for Developing a Blitz
  2. How to Packaging Blitz Calls
  3. Building a Better Zone Blitz
  4. Blitzing the Formation (BTF)
  5. Run Down Stop Calls
  6. Dog Check (Single-Dog Pressure)
  7. Attacking Empty/Quads
  8. 5 Tips For Blitzing From The Secondary

Quarters Pedagogy and Drill Tapes

  1. MQ’s DB Resource Page
  2. Teaching the Safeties
  3. Teaching the Corners
  4. Daily Musts for DBs
  5. Match Quarters Pass Distributions
  6. LB Philosophy and Fundamentals

3-4 Resources

  1. The Okie Front
  2. Defending Modern Spread from Okie
  3. Defending 11p from a 3-4
  4. The Tite Front (303/404)
  5. 3rd Down Calls From a 3-4

Analytics/Install/Opponent Breakdowns/Practice/Self-Scout

  1. Four Day Install Plan for a 4-2-5
  2. Breaking Down an Opponent
  3. Down & Distance Data
  4. Breaking Down the Run
  5. Breaking Down the Pass
  6. Building a Hit Chart
  7. Weekly Schedule (Practice Plan)
  8. 5 Cut-ups to Improve Your Self-Scout
  9. Throw Out the Stats – “What really is a “good” defense?”

 

© 2017, MatchQuarters.com | Cody Alexander | All rights reserved.


As always, support the site by following me on Twitter (@The_Coach_A) and spreading the word to your coaching friends by liking and retweeting the articles you read (even sharing them via Facebook and LinkedIn).

Do not hesitate to email me with questions through the site’s CONTACT page or through my DM on Twitter. I enjoy speaking with you guys (iron sharpens iron).

Make sure to bookmark this page which is updated after each article.

– Coach A.

How I Teach Match Quarters – Pt. 2

A clinic on the pedagogy of match quarters. Pt. 2 — Teaching the Safeties.

Teaching the Safeties

Four Read (Sky)

01-sky

Sky coverage is the “go to” coverage for Quarters teams on first down, and is used by many defensive coordinators to gain a nine-man box. The key difference in how DC’s play Sky coverage is the cover down by the Sam linebacker. In a true 4-2-5 scheme, the Sam LB is completely covered down to the #2 WR. The lack of a gap inside the box enables the Sam to widen his alignment and hold the inside hip of the slot. A 4-3 scheme apexes the Sam, allowing him to be aggressive to the box. How a DC decided to cover down the Sam affects how the safety to the field plays Sky coverage. In the diagram above, the defense is running a 4-2-5 with an Over Front and the Sam is completely covered down on the Sam. The 4-2-5 allows the safety to be more of a “robber” player, hanging in the intermediate in pass distribution and aggressive to the run. In a 4-3, the safety is in a hybrid man scheme because the Sam will be late to help with the #2 receiver.

The initial step of the safety referred to as a “step off.” This technique is a step-replace technique very similar to the CB’s slide technique in Sky. Each safety is aligned at 10 yards with a toe-to-heel stance and shaded to the inside eye of the slot receiver. 10 yards is a good depth for the safeties because it gives them enough depth to carry a vertical, yet they are close enough to drive on WR screens and play fit support in the run game. The main responsibility of each safety in pass coverage is to protect the inside of the field and bracket the #2 WR with the OLB. In coverage, the safeties are considered “robber” players and fit underneath any post route from the #1 WR (intermediate). The CB is the “topper” and must pin, or “top,” any vertical route from #1 (high hole). Against a double vertical route combination, the safeties will “collision and carry” the vertical of the slot WR. The collision and carry method is one that must be practiced multiple times.

The danger of Sky coverage is in the vertical by the slot. Being able to collision the slot as he is going vertical allows the safety to slow the WR down while regaining the upper hand on the route. In Sky, the safety is “stepping off” and is not fast bailing (Cloud). This allows the WR to climb with tempo. In order to combat a vertical by the slot, the Sam must get hands on the WR (easier out of a cover down) and the safeties eyes have to determine departure speed. Reading the departure speed of the slot is a key attribute a quarters safety must have. In order to combat the aggressiveness of the scheme, the safeties eyes have to be transfixed on the slot at the snap of the ball.

Versus the run, the safeties are responsible for making the OLBs right. If the OLB gets stuck inside, the safety will fit outside of the slot receiver (fit support). The OLB/safety work as a team to bracket the slots and cover the “O” gap to the field and the boundary safety (DS) corrects the Will to the boundary. This tandem action allows the safety to be aggressive to the ball in the run game. As stated in the previous paragraph, the safeties must key the slot’s departure speed in order to combat the aggressive nature of four-read.

The Cover Safety (field) has the most help  because the Sam is able to cover down all the way to the slot (in a 4-2-5). This allows the Sam to get his hands on the #2 WR and force the receiver to “run the hump” or slow his departure speed. The Down Safety (boundary) versus 10 personnel 2×2 must hold his position longer because the Will is not covered down to the slot (fold player into the “B”). Versus a 20/11 personnel look, the DS can be aggressive to the run because he must hold contain in the “O” gap (Will is now in the box) and is the intermediate player in the pass. This “robber” technique forces offenses to run vertical routes and away from the RPO slants. The aggressiveness of the DS in 20/11 pers. is why many quarters teams have a field corner and a boundary corner. The boundary corner tends to be the best man cover player because he is most likely not going to get quick support from the DS, who must fit the run. Continue reading “How I Teach Match Quarters – Pt. 2”

Lining Up to Ace

What to do with those two extra gaps.

.01 ACE-TREY HEADER.png

Lining up to an Ace set can be one of the most difficult formations for any defensive coordinator. The two extra gaps created by the TE’s force the defense to account for them in the run fits. If the offense decides to line both receivers up on the same side (Trey), it creates a three-receiver formation, with the added pressure of an extra gap to the strong side. Away from the Trey side, there is a “nub” TE (TE with no WR) and another gap created that the defense has to account for and subsequently defend (versus a traditional 11 personnel set, the defense can easily address the newly created gap). The concern in 11 personnel shifts to how a defense addresses the cover down to the two-speed side.

When offenses run Ace Trey, the defense has to account for two extra gaps as well as the cover down on the two-speed side. If the offense runs its sets from the pistol, they literally have two strong points of attack. The Ace grouping of formations is very similar to the Diamond in the fact the offense can max protect and run with extra blockers from an even set, essentially gaining a two-way-go and the ability to  attack the side the offense feels it has the most advantage. Unlike the Diamond formation (inverted Bone), where the extra gaps can be created by the backfield post-snap, the Ace formations establish the gaps before the snap of the ball. This immediate addressing of the gaps forces the defense to show its cards. Continue reading “Lining Up to Ace”

Defending Jet Motion

Don’t take the bait. Don’t get out leveraged.

01-auburn

The jet motion is a great leveraging tool that offenses use to either move the defense (to counter the opposite way) or cut them off (speed kills). Auburn under Malzahn has utilized the jet motion to create deception and outmaneuver opponents. The speed at which the jet motion attacks, forces the defense to recognize the motion and adjust accordingly. Because the offense is using a fast motion, the defense is forced to plus alignments or spin an extra player down to the side the motion is moving. Many times, an offense uses their best athlete on the jet motion to focus even more attention on the movement.  Offenses can even use the jet motion as a decoy because the defense has to honor the motion. To gain width, or to freeze an OLB/DE, offenses will send a jet motion to one side and run a play going away. This “freezing” of the defense allows an extra lineman to climb to the next level. This focus causes tunnel vision and can lead to exposure away from the direction of the motion.

Offenses use motion as a leverage tool. The Slot-T version of the spread, which Auburn runs, uses the jet motion to move the defense into compromising positions. Every 03-auburndefensive coach knows that when an offense uses motion (especially jet motion), the defense is forced to adjust promptly to the new formation. As stated earlier, the speed of the jet motion can make defenses over rotate to counteract the quick rotation of the offense. For many defensive coordinators, it is easier to rotate safeties (spin) than to bump linebackers because of the tempo at which the WR or slot is running. The introduction of unbalanced formations (X-off) and the utilization of the quarterback in the run game have made it more difficult for defenses to defend jet motion teams. In the picture above, Auburn used an unbalanced set to attack the Alabama defense. Out of the stack set shown, the offense can run a double lead jet stretch, running back counter weak, jet power read with two lead blockers or any QB run they choose. With so many play variations off of one formation and motion, it is no wonder many spread teams are using this type of motion to build whole offenses around. Any time the QB becomes a runner, the defense is stressed even more. The added value that the jet motion gives teams is undeniable. Continue reading “Defending Jet Motion”

MQ’s Four and Two Read Pass Distributions

Match Quarters pass distributions explained.

When implementing a quarters scheme, Four Read is the Day #1 install coverage and a DC’s most likely first down call. The Cover 4 scheme allows the safeties to be ultra aggressive to the run, yet hold a two-high shell and keep the defense balanced versus multiple formations. Defensive coaches lean on the Cover 4 scheme because it allows the defense to essentially create a nine-man box versus spread sets. For most spread teams, the OC does not account for the two safeties (they are not physically in the box, or fold players). This is where teams running a quarters scheme gain an advantage. DC’s used to rely on a true Cover 2 scheme to gain the hard edge of the CBs against the run. This left the defense vulnerable on the edge of the box, passing lanes in the middle of the field (high completion throw), and put the Mike in a run/pass conflict. As modern football has turned to the spread (and RPO style), more DC’s are turning to the variations of match quarters to answer their run and pass distribution problems. In a previous article (The Art of Match Quarters), I touched on the basics of pass distributions of Four and Two Read. In today’s article, I will go in-depth on the intricacies of each versus popular route combinations.

Continue reading “MQ’s Four and Two Read Pass Distributions”