OPB Founding Report
Alex River
Prepared May 15, 2026
01
Executive summary
The pattern to address first
Alex River's supplied tournament sample reads as a player whose most useful next step is not a broad style rebuild, but a focused review of blind participation concentration. Blind participation ran 46% above non-blind participation in the supplied sample. This finding ranks first because the same observable decision shape appears often enough to be reviewed as a family, and because its correction can be tracked without pretending that one hand has a universal answer. Supporting review areas are mid-stack pressure response, passive gap under pressure. The report uses only production-safe participation and pressure-response metrics for customer-facing ranking. It does not use TAG Alignment, Stake Fit, or Leak Persistence as authoritative claims. Evidence quality is moderate evidence, so the adjustment should be applied as a post-session study focus and checked again as more tournaments are added—not as a guarantee or live-play instruction.
02
Your primary leak
Blind Participation Concentration
Blind participation ran 46% above non-blind participation in the supplied sample.
Why it matters
A concentrated blind gap can hide the exact positions creating the overall participation profile and deserves its own review before a global range change.
Specific correction
Split SB and BB decisions, then review the largest repeated call/open cluster instead of applying one blanket blind adjustment.
- Observed value
- 46%
- Decision sample
- 60
- Tournaments
- 12
- Metric
- participation discipline
03
Supporting leaks
The next patterns in line
Supporting finding
Mid-Stack Pressure Response
At 15–35 BB, calls represented 84% of parsed continue decisions after aggression.
Why it matters
Mid stacks create meaningful commitment choices. A repeated call-heavy shape is actionable because it can be reviewed as a bounded decision family.
Specific correction
During post-session review, compare the call to raise/jam/fold alternatives in every tagged 15–35 BB pressure spot.
- Observed value
- 84%
- Decision sample
- 25
- Tournaments
- 12
- Metric
- passive gap pressure
Why it ranks lower: Its ranking score was lower after severity, frequency, reliability, and actionability were combined.
Supporting finding
Passive Gap Under Pressure
Calls represented 84% of parsed continue decisions after preflop aggression.
Why it matters
The result does not declare those calls wrong. It identifies a repeated response shape where raise, jam, and fold alternatives deserve structured comparison during review.
Specific correction
Tag every continue-versus-aggression decision and compare call, raise/jam, and fold by position and effective stack.
- Observed value
- 84%
- Decision sample
- 25
- Tournaments
- 12
- Metric
- passive gap pressure
Why it ranks lower: Its ranking score was lower after severity, frequency, reliability, and actionability were combined.
04
Evidence from your play
The measurements behind the ranking
Participation Discipline
Observable voluntary preflop participation from parsed GG hand histories.
Passive Gap Pressure
Observable call-versus-reraise mix after facing preflop aggression.
05
Representative situations
Examples that carry the pattern
- SAMPLE-001
BB · 24 BB · KJo
Opponent raise → Hero call
- Decision
- call
- Actual result
- -3.4 BB
This is a direct example of blind participation concentration in the parsed sample.
Future review rule: Split SB and BB decisions, then review the largest repeated call/open cluster instead of applying one blanket blind adjustment.
- SAMPLE-002
BB · 24 BB · KJo
Opponent raise → Hero call
- Decision
- call
- Actual result
- -3.4 BB
This is a direct example of blind participation concentration in the parsed sample.
Future review rule: Split SB and BB decisions, then review the largest repeated call/open cluster instead of applying one blanket blind adjustment.
- SAMPLE-003
BB · 24 BB · KJo
Opponent raise → Hero call
- Decision
- call
- Actual result
- -3.4 BB
This is a direct example of blind participation concentration in the parsed sample.
Future review rule: Split SB and BB decisions, then review the largest repeated call/open cluster instead of applying one blanket blind adjustment.
- SAMPLE-004
BB · 24 BB · KJo
Opponent raise → Hero call
- Decision
- call
- Actual result
- -3.4 BB
This is a direct example of blind participation concentration in the parsed sample.
Future review rule: Split SB and BB decisions, then review the largest repeated call/open cluster instead of applying one blanket blind adjustment.
- SAMPLE-005
BB · 24 BB · KJo
Opponent raise → Hero call
- Decision
- call
- Actual result
- -3.4 BB
This is a direct example of blind participation concentration in the parsed sample.
Future review rule: Split SB and BB decisions, then review the largest repeated call/open cluster instead of applying one blanket blind adjustment.
07
What this report does not mean
Keep the evidence in bounds
- This report evaluates patterns in the supplied sample.
- It does not guarantee future results; tournament variance remains significant.
- Limited samples reduce confidence and should not trigger broad range changes.
- This product is for post-session study and pre-session preparation, never active in-game assistance.