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Piet Griessmann

Fightschool Hannover

W–L
1–2
Won and lost rating-eligible matches in the past 12 months.
Gi
-
Rating based on Gi matches in the past 12 months.
No-Gi
1,195
Rating based on No-Gi matches in the past 12 months.
Current form
1–2
Results from the ten most recent rating-eligible matches.
Opponents
1
Unique opponents faced in rating-eligible matches in the past 12 months.

Honours

Medals and placements

Gold
0
Silver
1
Bronze
0
Total medals
1
Events with results
3

Full career record

Wins
2
Losses
5
Matches
7
Win rate
28.6%

Ways of winning

Submission
0
Points
0
Decision
0
Disqualification
0
Other recorded result
2

Personal records

Longest winning streak
1

Recent recorded placements

12-month performance profile

How the results were achieved

Past 12 months
Current win streak
0
Unique opponents
1
Distinct events
1

Ways of winning

  • Submission 0 0%
  • Points 0 0%
  • Decision 0 0%
  • Other recorded result 1 100%

Gi versus No-Gi

Gi

Rating
-
Record
-
Win rate
-
Submission share
-

No-Gi

Rating
1195
Record
1–2
Win rate
33%
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
1,195
Change over 90 days
+31
Highest rating in 12 months
1,226
Performance versus expectation
-
Schedule strength
-
Average opponent rating
1,414
Weighted win rate
-
Expected win rate
-
Repeat-opponent share
67%
Effective evidence
1.3
Confidence
26/100

Opponents

Opposition and rivalries

The strongest recorded win, rematches and opponents faced repeatedly.

Rematches 1–2 1–2 across 3 rematches against 1 repeat opponents.

Rivals

Opponent Head-to-head record Matches
Taha Bozali 1–2 3

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 -6 Rating 1,195

Rating-period composition

Rating matches
3 0
Record
1–2 Previous month 1–2
Opponents
1 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 1,201

Rating-period composition

Rating matches
3 0
Record
1–2 Previous month 1–2
Opponents
1 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 · 2 left period Change -37 Rating 1,201

Rating-period composition

Rating matches
3 -2
Record
1–2 Previous month 2–3
Opponents
1 -2
Events
1 -1

2 older matches left the 12-month period: 1 won and 1 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

May 2026 No new matches Change +1 Rating 1,238

Rating-period composition

Rating matches
5 0
Record
2–3 Previous month 2–3
Opponents
3 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.

April 2026 No new matches Change -1 Rating 1,237

Rating-period composition

Rating matches
5 0
Record
2–3 Previous month 2–3
Opponents
3 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.

March 2026 No new matches Change 0 Rating 1,238

Rating-period composition

Rating matches
5 0
Record
2–3 Previous month 2–3
Opponents
3 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.

February 2026 No new matches Change +2 Rating 1,238

Rating-period composition

Rating matches
5 0
Record
2–3 Previous month 2–3
Opponents
3 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 +2 Rating 1,236

Rating-period composition

Rating matches
5 0
Record
2–3 Previous month 2–3
Opponents
3 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 +2 Rating 1,234

Rating-period composition

Rating matches
5 0
Record
2–3 Previous month 2–3
Opponents
3 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 No new matches Change +2 Rating 1,232

Rating-period composition

Rating matches
5 0
Record
2–3 Previous month 2–3
Opponents
3 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.

October 2025 No new matches Change +4 Rating 1,230

Rating-period composition

Rating matches
5 0
Record
2–3 Previous month 2–3
Opponents
3 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.

September 2025 3 new matches Change +31 Rating 1,226

Rating-period composition

Rating matches
5 +3
Record
2–3 Previous month 1–1
Opponents
3 +1
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
September 6, 2025 Taha Bozali
TMIYC - TAP ME IF YOU CAN NO GI SUBMISSION ONLY 06.09.2025 Youth Men's NO-GI / White Belt (Beginner) / Teen (14-17 yrs) / -66 kg
Method Submission 02:57
Marginal influence -21
Win
September 6, 2025 Taha Bozali
TMIYC - TAP ME IF YOU CAN NO GI SUBMISSION ONLY 06.09.2025 Youth Men's NO-GI / White Belt (Beginner) / Teen (14-17 yrs) / -66 kg
Method Other recorded result 04:23
Marginal influence +43
Loss
September 6, 2025 Taha Bozali
TMIYC - TAP ME IF YOU CAN NO GI SUBMISSION ONLY 06.09.2025 Youth Men's NO-GI / White Belt (Beginner) / Teen (14-17 yrs) / -66 kg
Method Submission 02:11
Marginal influence -21
Relevant matches
1.3
Official ranking percentile
-
Performance
-

1.3 weighted matches against 1 different opponents across 1 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,414
Repeated-opponent share
66.7%
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

TMIYC - TAP ME IF YOU CAN SUBMISSION ONLY (NOGI) 06.12.2025
U18 · Counts
Youth Men's NO-GI / White Belt (Beginner) / Teen (14-17 yrs) / -66 kg
  • Competition age 16
TMIYC - TAP ME IF YOU CAN NO GI SUBMISSION ONLY 06.09.2025
Does not count
Youth Men's NO-GI / White Belt (Beginner) / Teen (14-17 yrs) / -66 kg
  • Competition age 16

Classification evidence

Why ≤ 66 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

  • ≤ 66 kg 1 competition event Selected outcome

Registrations and outcomes

TMIYC - TAP ME IF YOU CAN SUBMISSION ONLY (NOGI) 06.12.2025
Does not count
Youth Men's NO-GI / White Belt (Beginner) / Teen (14-17 yrs) / -66 kg
  • Registered weight class: -66 kg
  • Source competition limit: -66 kg

No matches in the rating period · no valid weight evidence

TMIYC - TAP ME IF YOU CAN NO GI SUBMISSION ONLY 06.09.2025
≤ 66 kg · Counts as a competition event
Youth Men's NO-GI / White Belt (Beginner) / Teen (14-17 yrs) / -66 kg
  • Registered weight class: -66 kg
  • Source competition limit: -66 kg

3 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 3 matches in the rating period Selected outcome

Registrations and outcomes

TMIYC - TAP ME IF YOU CAN NO GI SUBMISSION ONLY 06.09.2025
white · Counts as a match
Youth Men's NO-GI / White Belt (Beginner) / Teen (14-17 yrs) / -66 kg
  • Source belt category: white

3 matches in the rating period