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Borys Stefanski

Berserkers Team Szczecin/Prawobrzeże

W–L
7–2
Won and lost rating-eligible matches in the past 12 months.
Gi
1,257
Rating based on Gi matches in the past 12 months.
No-Gi
1,360
Rating based on No-Gi matches in the past 12 months.
Current form
7–2
Results from the ten most recent rating-eligible matches.
Opponents
8
Unique opponents faced in rating-eligible matches in the past 12 months.

Honours

Medals and placements

Gold
0
Silver
4
Bronze
0
Total medals
4
Events with results
2

Full career record

Wins
12
Losses
2
Matches
14
Win rate
85.7%

Ways of winning

Submission
4
Points
6
Decision
1
Disqualification
1

Personal records

Longest winning streak
9
Longest submission streak
4
Largest recorded points win
18–0

Recent recorded placements

  1. Grappling Industries BERLIN

    DE Event record 7–2

    • Gi Teens / Male / White / 16 - 17 years / -170 lbs
    • No Gi Teens / Male / Beginner (White) / 16 - 17 years / -170 lbs

  2. Grappling Industries BERLIN

    DE Event record 5–0

    • Gi Kids / White / 16 - 17 years (Male) / -155 lbs
    • No Gi Kids / Beginner (White) / 16 - 17 years (Male) / -155 lbs

12-month performance profile

How the results were achieved

Past 12 months
Current win streak
3
Unique opponents
8
Distinct events
1

Ways of winning

  • Submission 0 0%
  • Points 6 86%
  • Decision 1 14%
  • Other recorded result 0 0%

Gi versus No-Gi

Gi

Rating
1257
Record
2–1
Win rate
67%
Submission share
0%

No-Gi

Rating
1360
Record
5–1
Win rate
83%
Submission share
0%

Win quality

Grouped by pre-match win probability. This provides context and does not award an extra rating bonus.

As underdog 0–0 Less than 35% expected win probability before the match.
Even match 0–0 Between 35% and 65% expected win probability before the match.
As favourite 0–0 More than 65% expected win probability before the match.

Development

Rating and development

The same published rating, supported by trend, opponent strength and evidence quality.

Current rating
1,395
Change over 90 days
+67
Highest rating in 12 months
1,468
Performance versus expectation
-
Schedule strength
-
Average opponent rating
1,265
Weighted win rate
-
Expected win rate
-
Repeat-opponent share
11%
Effective evidence
6.1
Confidence
75/100

Opponents

Opposition and rivalries

The strongest recorded win, rematches and opponents faced repeatedly.

Rematches 2–0 2–0 across 2 rematches against 1 repeat opponents.

Rivals

Opponent Head-to-head record Matches
Mark Nayyem 2–0 2

Recent tournaments

Calculation details

Rating breakdown for the past 12 months

See the published month-end rating and the rating-eligible matches added in each month. Open a month for details.

August 2026 No new matches Change 0 Rating 1,395

Rating-period composition

Rating matches
9 0
Record
7–2 Previous month 7–2
Opponents
8 0
Events
1 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

July 2026 No new matches Change 0 Rating 1,395

Rating-period composition

Rating matches
9 0
Record
7–2 Previous month 7–2
Opponents
8 0
Events
1 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

June 2026 No new matches Change 0 Rating 1,395

Rating-period composition

Rating matches
9 0
Record
7–2 Previous month 7–2
Opponents
8 0
Events
1 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

May 2026 No new matches Change 0 Rating 1,395

Rating-period composition

Rating matches
9 0
Record
7–2 Previous month 7–2
Opponents
8 0
Events
1 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

April 2026 No new matches Change 0 Rating 1,395

Rating-period composition

Rating matches
9 0
Record
7–2 Previous month 7–2
Opponents
8 0
Events
1 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

March 2026 No new matches · 5 left period Change -71 Rating 1,395

Rating-period composition

Rating matches
9 -5
Record
7–2 Previous month 12–2
Opponents
8 -5
Events
1 -1

5 older matches left the 12-month period: 5 won and 0 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

February 2026 No new matches Change -2 Rating 1,466

Rating-period composition

Rating matches
14 0
Record
12–2 Previous month 12–2
Opponents
13 0
Events
2 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

January 2026 No new matches Change 0 Rating 1,468

Rating-period composition

Rating matches
14 0
Record
12–2 Previous month 12–2
Opponents
13 0
Events
2 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

December 2025 No new matches Change 0 Rating 1,468

Rating-period composition

Rating matches
14 0
Record
12–2 Previous month 12–2
Opponents
13 0
Events
2 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

November 2025 9 new matches Change +75 Rating 1,468

Rating-period composition

Rating matches
14 +9
Record
12–2 Previous month 5–0
Opponents
13 +8
Events
2 +1

New rating matches

This is a current what-if estimate: roughly how much the current rating changes when this match is omitted. These values cannot be added and therefore do not together explain the monthly change.
Loss
November 22, 2025 Sanel Koca
Grappling Industries BERLIN No Gi Teens / Male / Beginner (White) / 16 - 17 years / -170 lbs
Method Decision 04:00 0–0
Marginal influence -15
Win
November 22, 2025 Kolja Mohr
Grappling Industries BERLIN No Gi Teens / Male / Beginner (White) / 16 - 17 years / -170 lbs
Method Points 04:00 8–0
Marginal influence +20
Win
November 22, 2025 Mark Nayyem
Grappling Industries BERLIN No Gi Teens / Male / Beginner (White) / 16 - 17 years / -170 lbs
Method Points 04:00 10–0
Marginal influence +14
Win
November 22, 2025 Stanislav Hryshchuk
Grappling Industries BERLIN No Gi Teens / Male / Beginner (White) / 16 - 17 years / -170 lbs
Method Points 04:00 14–0
Marginal influence +14
Win
November 22, 2025 John- Luca Nitsch
Grappling Industries BERLIN No Gi Teens / Male / Beginner (White) / 16 - 17 years / -170 lbs
Method Points 04:00 18–0
Marginal influence +9
Win
November 22, 2025 Said Bersaev
Grappling Industries BERLIN No Gi Teens / Male / Beginner (White) / 16 - 17 years / -170 lbs
Method Points 04:00 2–0
Marginal influence +20
Win
November 22, 2025 Mark Nayyem
Grappling Industries BERLIN Gi Teens / Male / White / 16 - 17 years / -170 lbs
Method Points 04:00 9–0
Marginal influence +1
Loss
November 22, 2025 Vadim Gau
Grappling Industries BERLIN Gi Teens / Male / White / 16 - 17 years / -170 lbs
Method Points 04:00 0–10
Marginal influence -18
Win
November 22, 2025 Marek Sulzer
Grappling Industries BERLIN Gi Teens / Male / White / 16 - 17 years / -170 lbs
Method Decision 04:00 0–0
Marginal influence +4
October 2025 No new matches Change 0 Rating 1,393

Rating-period composition

Rating matches
5 0
Record
5–0 Previous month 5–0
Opponents
5 0
Events
1 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

September 2025 No new matches Change -8 Rating 1,393

Rating-period composition

Rating matches
5 0
Record
5–0 Previous month 5–0
Opponents
5 0
Events
1 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

Relevant matches
6.1
Official ranking percentile
-
Performance
-

6.1 weighted matches against 8 different opponents across 1 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,265
Repeated-opponent share
11.1%
Network connectivity
87.6%

Classification evidence

Why U18?

Within the published period from 2025-09-01 through 2026-08-31, only competition ages recorded at events in the calculation year determine this outcome, with at most one vote per event. Without such an age, the most recent unambiguous earlier competition age is projected to the calculation year; bracket evidence is the final fallback. The newest evidence breaks a tie.

Evidence outcome

  • U18 1 event vote Selected outcome

Registrations and outcomes

Grappling Industries BERLIN
U18 · Counts
Gi Teens / Male / White / 16 - 17 years / -170 lbs
  • Competition age 17
  • Registered age: u18
  • Source category: u18
No Gi Teens / Male / Beginner (White) / 16 - 17 years / -170 lbs
  • Competition age 17
  • Registered age: u18
  • Source category: u18

Classification evidence

Why ≤ 77 kg?

This outcome uses at most one unambiguous upper weight limit per completed ranking event from 2025-09-01 through 2026-08-31. Only the three most recent eligible events are considered, and the lightest verified upper limit is selected. A higher division is not treated as measured body weight.

Evidence outcome

  • ≤ 77 kg 1 competition event Selected outcome

Registrations and outcomes

Grappling Industries BERLIN
≤ 77 kg · Counts as a competition event
Gi Teens / Male / White / 16 - 17 years / -170 lbs
  • Registered weight class: -170 lbs
  • Source competition limit: -170 lbs

3 matches in the rating period

Grappling Industries BERLIN
≤ 77 kg · Counts as a competition event
No Gi Teens / Male / Beginner (White) / 16 - 17 years / -170 lbs
  • Registered weight class: -170 lbs
  • Source competition limit: -170 lbs

6 matches in the rating period

Classification evidence

Why White?

This outcome uses the belt category of every rating-eligible match from 2025-09-01 through 2026-08-31. The most-fought category is selected; the newest evidence breaks a tie.

Evidence outcome

  • white 9 matches in the rating period Selected outcome

Registrations and outcomes

Grappling Industries BERLIN
white · Counts as a match
No Gi Teens / Male / Beginner (White) / 16 - 17 years / -170 lbs
  • Source belt category: white

6 matches in the rating period

Grappling Industries BERLIN
white · Counts as a match
Gi Teens / Male / White / 16 - 17 years / -170 lbs
  • Source belt category: white

3 matches in the rating period