Open Septembre 2025
Open SwissStandard
51 players participated in this 7-round tournament, held from 26 Sept 2025 to 28 Sept 2025 in Nouakchott, Mauritania. 1 titled players. Top 10 Elo average was 1771, and top seed was Abdellahi Khaled Abdellahi (🇲🇷 MTN, 1958).
Abdellahi Khaled Abdellahi (🇲🇷 MTN, 1958) won with 6.5/7, ahead of Abdou Ahmed Alem (6.5) and Ahmed cherif Khaled Abdellahi (6.0). Abdellahi shared the lead from round 1, winning on tie-break.
The biggest upset came in round 6: Mohamed Abdel Hay Baba (1508) beat Abdalahi Sidi Mohamed Idi (1763), a +255-point gap.
Location
🇲🇷Nouakchott, Mauritania
Dates
26 Sept 2025 → 28 Sept 2025
Time control
Standard: 60 minutes with 30 seconds increment from move 1
System
Swiss · 7 rounds
Titled players · 1
CM×1
Federations · 1 represented
🇲🇷Mauritania×30
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 7 roundsTight race until R7; 2 players tied at 6.5/7, decided on Buchholz. Title race narrowed from 4 co-leaders at R4 to 2 at the finish.
Co-leaders
32
16
8
4
2
2
2
R7 · TIEBREAK CLUSTER
2 players finish on 6.5/7. Abdellahi takes the title on Buchholz Cut1 (29.0).
R6 · HEAD-TO-HEAD · WINNER VS 2ND
CM Abdou Ahmed Alem drew with Abdellahi Khaled Abdellahi (White).
WIN STREAKS · 3 top finishers
CM Abdou Ahmed Alem 5 wins (R1–R5)Abdellahi Khaled Abdellahi 5 wins (R1–R5)Ahmed cherif Khaled Abdellahi 4 wins (R1–R4)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1CMAbdou Ahmed Alem | * | ½ | — | — |
| 2Abdellahi Khaled Abdellahi | ½ | * | 1 | — |
| 3Ahmed cherif Khaled Abdellahi | — | 0 | * | — |
| 4Hamady Abdel Malick | — | — | — | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | R7 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Abdellahi Khaled Abdellahi | 1958 | MTN | +46B | +28N | +18B | +13N | +3B | =2N | +5B | 6.5 | 29.0 | 29.0 | 25.75 | 2130 | +33.6 |
| 2 | Abdou Ahmed AlemCM | 1926 | MTN | +43N | +34B | +22N | +8B | +5N | =1B | +6N | 6.5 | 28.0 | 29.0 | 25.75 | 2088 | +31.2 |
| 3 | Ahmed cherif Khaled Abdellahi | 1856 | MTN | +48B | +24N | +9B | +6N | −1N | +18B | +7N | 6.0 | 29.5 | 29.5 | 23.00 | 1912 | +15.6 |
| 4 | Hamady Abdel Malick | 1685 | MTN | =35B | +21N | +25B | −18N | +14B | +10N | +17B | 5.5 | 25.5 | 27.5 | 22.50 | 1842 | +32.4 |
| 5 | Yahya Dy | 1643 | MTN | +47B | +33N | +16B | +17N | −2B | +9N | −1N | 5.0 | 29.5 | 29.5 | 16.50 | 1827 | +35.2 |
| 6 | Mohamed Lemine Dine | 1634 | MTN | +50N | +27B | +15N | −3B | +19N | +17N | −2B | 5.0 | 28.5 | 28.5 | 16.00 | 1734 | +13.6 |
| 7 | Mohamed Abdel Hay Baba | 1508 | MTN | +10B | +31N | −17B | +37N | +12B | +13N | −3B | 5.0 | 27.5 | 29.5 | 19.50 | 1680 | +21.6 |
| 8 | Taher El Moustapha | 1783 | MTN | +36B | +32N | +14B | −2N | −10B | +29N | +20B | 5.0 | 26.0 | 28.0 | 16.50 | 1708 | -3.2 |
| 9 | Oumar Taleb Abeidi | 1631 | MTN | +39N | +20B | −3N | +40B | +23N | −5B | +31N | 5.0 | 24.0 | 26.0 | 15.00 | 950 | -27.6 |
| 10 | Mohamed El Habibe El Hadi | 0 | MTN | −7N | +?B | +?N | +22B | +8N | −4B | +18N | 5.0 | 23.5 | 23.5 | 13.00 | 1658 | 0.0 |
| 11 | FIDE 19611650 | 0 | — | +12B | +?N | −13B | +31N | −17B | +?N | +23B | 5.0 | 20.5 | 20.5 | 12.00 | 979 | 0.0 |
| 12 | FIDE 19611943 | 0 | — | −11N | +?B | +34N | +?B | −7N | +22B | +19N | 5.0 | 20.5 | 20.5 | 10.50 | 1549 | 0.0 |
| 13 | Abdalahi Sidi Mohamed Idi | 1763 | MTN | +38N | +40B | +11N | −1B | +32N | −7B | =15N | 4.5 | 26.0 | 28.0 | 14.25 | 933 | -42.4 |
| 14 | Abdellahi El Hadj Sidi | 0 | MTN | +26N | +23B | −8N | =27B | −4N | +34B | +?B | 4.5 | 24.0 | 24.0 | 11.75 | 934 | 0.0 |
| 15 | Nevissa Dahi | 0 | MTN | +?B | +25N | −6B | +30N | −18B | +?N | =13B | 4.5 | 20.5 | 20.5 | 9.25 | 1545 | 0.0 |
| 16 | FIDE 19607890 | 0 | — | +?N | +29B | −5N | −19B | +30B | =28N | +?B | 4.5 | 18.0 | 18.0 | 7.50 | 1567 | 0.0 |
| 17 | Cheikh Mohamed Saad Bedi | 1794 | MTN | +51N | +19B | +7N | −5B | +11N | −6B | −4N | 4.0 | 29.5 | 29.5 | 14.00 | 1531 | -68.4 |
| 18 | Abderrahmane Tolba | 1630 | MTN | +49B | +37N | −1N | +4B | +15N | −3N | −10B | 4.0 | 29.5 | 29.5 | 12.00 | 1708 | +9.6 |
| 19 | Fatimatou El Hadj Sidi | 0 | MTN | +21B | −17N | +?B | +16N | −6B | +?N | −12B | 4.0 | 22.5 | 22.5 | 8.50 | 1652 | 0.0 |
| 20 | Mohamed Vall Mohamed Telmidy | 0 | MTN | +?B | −9N | −32B | +43N | +24B | +21N | −8N | 4.0 | 22.0 | 22.0 | 9.00 | 1569 | 0.0 |
| 21 | Mohamed Mohamed Selahi | 1669 | MTN | −19N | −4B | +47N | +38B | +26N | −20B | +30N | 4.0 | 22.0 | 22.0 | 8.50 | 885 | -19.2 |
| 22 | Abdellahi Dedach | 1590 | MTN | +44B | +45N | −2B | −10N | +36B | −12N | +38B | 4.0 | 21.5 | 22.5 | 6.00 | 1126 | -4.8 |
| 23 | FIDE 19611935 | 0 | — | +30B | −14N | +36B | +?N | −9B | +35N | −11N | 4.0 | 21.5 | 21.5 | 7.00 | 831 | 0.0 |
| 24 | Bouchra Abbe | 0 | MTN | +?N | −3B | −27N | +42B | −20N | +40B | +35B | 4.0 | 18.5 | 18.5 | 5.00 | 1057 | 0.0 |
| 25 | Boukhreiss Mahmoud | 1501 | MTN | +42N | −15B | −4N | +39B | −35N | +47B | +33N | 4.0 | 18.0 | 18.0 | 6.00 | 885 | -10.4 |
| 26 | FIDE 19604807 | 0 | — | −14B | +46N | +28B | =29N | −21B | −?N | +34N | 3.5 | 17.0 | 17.0 | 7.00 | 1387 | 0.0 |
| 27 | Youssouf Mohamed Mahmoud | 0 | MTN | +?B | −6N | +24B | =14N | −29B | −?N | +?B | 3.5 | 16.5 | 16.5 | 6.25 | 762 | 0.0 |
| 28 | FIDE 19612109 | 0 | — | +?B | −1B | −26N | +33N | F | =16B | =29B | 3.0 | 22.5 | 22.5 | 6.75 | 1531 | 0.0 |
| 29 | Fatma Vall Abdel Malick | 1490 | MTN | +41B | −16N | F | =26B | +27N | −8B | =28N | 3.0 | 21.5 | 22.5 | 8.75 | 983 | -6.0 |
| 30 | FIDE 19611889 | 0 | — | −23N | +42B | +?N | −15B | −16N | +41B | −21B | 3.0 | 20.0 | 20.0 | 3.00 | 869 | 0.0 |
| 31 | FIDE 19612052 | 0 | — | +?N | −7B | +38N | −11B | +?N | F | −9B | 3.0 | 20.0 | 20.0 | 2.00 | 770 | 0.0 |
| 32 | Bouya Ahmed Bouya Ahmed | 0 | MTN | +?N | −8B | +20N | +?B | −13B | F | F | 3.0 | 18.5 | 18.5 | 4.00 | 973 | 0.0 |
| 33 | Mohamed Mahmoud Yahye | 0 | MTN | +?N | −5B | −?N | −28B | +46N | +?B | −25B | 3.0 | 12.0 | 12.0 | 0.00 | 772 | 0.0 |
| 34 | FIDE 19611803 | 0 | — | +?B | −2N | −12B | +?N | =?B | −14N | −26B | 2.5 | 19.5 | 19.5 | 0.00 | 1126 | 0.0 |
| 35 | Elhassen Taleb | 0 | MTN | =4N | −?B | =39N | F | +25B | −23B | −24N | 2.0 | 19.5 | 19.5 | 7.75 | 1566 | 0.0 |
| 36 | Sid Ahmed El Ghelawi | 0 | MTN | −8N | +?B | −23N | +?B | −22N | F | F | 2.0 | 17.0 | 17.0 | 0.00 | 887 | 0.0 |
| 37 | FIDE 19608985 | 0 | — | +?N | −18B | +?N | −7B | F | F | F | 2.0 | 16.0 | 16.0 | 0.00 | 769 | 0.0 |
| 38 | FIDE 19609299 | 0 | — | −13B | +?N | −31B | −21N | F | +?B | −22N | 2.0 | 15.5 | 15.5 | 0.00 | 874 | 0.0 |
| 39 | Mahfoudh Boubacar | 0 | MTN | −9B | =?N | =35B | −25N | +?N | F | F | 2.0 | 14.0 | 14.0 | 1.00 | 766 | 0.0 |
| 40 | Mohamed Dedach | 0 | MTN | +?B | −13N | F | −9N | −?B | −24N | +46B | 2.0 | 13.5 | 13.5 | 0.00 | 1510 | 0.0 |
| 41 | FIDE 19611625 | 0 | — | −29N | −?B | +?N | +?B | −?B | −30N | F | 2.0 | 6.0 | 6.0 | 0.00 | 701 | 0.0 |
| 42 | FIDE 19609981 | 0 | — | −25B | −30N | +46B | −24N | F | −43B | −?N | 1.0 | 12.0 | 12.0 | 0.00 | 701 | 0.0 |
| 43 | FIDE 19612095 | 0 | — | −2B | −?N | F | −20B | F | +42N | −?B | 1.0 | 11.5 | 11.5 | 1.00 | 919 | 0.0 |
| 44 | FIDE 19611846 | 0 | — | −22N | +?N | F | F | F | F | F | 1.0 | 7.0 | 7.0 | 0.00 | 790 | 0.0 |
| 45 | FIDE 19612087 | 0 | — | +?B | −22B | F | F | F | F | F | 1.0 | 4.0 | 4.0 | 0.00 | 790 | 0.0 |
| 46 | FIDE 19608306 | 0 | — | −1N | −26B | −42N | F | −33B | F | −40N | 0.0 | 16.0 | 16.0 | 0.00 | 1158 | 0.0 |
| 47 | FIDE 19611706 | 0 | — | −5N | −?B | −21B | F | F | −25N | −?N | 0.0 | 14.0 | 14.0 | 0.00 | 804 | 0.0 |
| 48 | FIDE 19612117 | 0 | — | −3N | F | F | F | F | F | F | 0.0 | 10.0 | 10.0 | 0.00 | 1057 | 0.0 |
| 49 | FIDE 19611838 | 0 | — | −18N | −?B | F | −?N | F | F | F | 0.0 | 5.0 | 5.0 | 0.00 | 771 | 0.0 |
| 50 | FIDE 19611994 | 0 | — | −6B | F | F | F | F | F | F | 0.0 | 5.0 | 5.0 | 0.00 | 834 | 0.0 |
| 51 | Sidi Elemine Tourad El Anany | 1545 | MTN | −17B | F | F | F | F | F | F | 0.0 | 4.0 | 4.0 | 0.00 | 994 | -7.6 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Yahya DyMTN+35.25.0 pts · #6
- 2Abdellahi Khaled AbdellahiMTN+33.66.5 pts · #2
- 3Hamady Abdel MalickMTN+32.45.5 pts · #5
Top rating losers
- 1Cheikh Mohamed Saad BediMTN-68.44.0 pts · #7
- 2Abdalahi Sidi Mohamed IdiMTN-42.44.5 pts · #49
- 3Oumar Taleb AbeidiMTN-27.65.0 pts · #25
Biggest upsets
- R6+255 Elo gap
- R6+160 Elo gap
- R4+151 Elo gap