1st Nairobi Chess Club Grand Prix - Open

Open SwissStandard

59 players participated in this 6-round tournament, held from 26 Jun 2026 to 28 Jun 2026 in Nairobi, Kenya. 3 titled players from 3 federations. Top 10 Elo average was 1993, and top seed was Peter Majur Manyang (🇸🇸 SSD, FM, 2101).

Peter Majur Manyang (🇸🇸 SSD, FM, 2101) won with 6.0/6, ahead of Ngong Atem Gak (5.0) and Madol Garang Panthou Joh (5.0). Manyang won solo starting round 4.

The biggest upset came in round 6: Simiyu Kibwana (1527) beat Mbaabu Cyprian (1936), a +409-point gap.

Location

🇰🇪Nairobi, Kenya

Dates

26 Jun 2026 → 28 Jun 2026

Time control

Standard: 90 minutes with 30 second increment from move 1

System

Swiss · 6 rounds

Top seed

🇸🇸FMPeter Majur Manyang2101

Avg top 10

1,993

Participants

Titled players · 3

FM×1

CM×1

WCM×1

Federations · 3 represented

🇰🇪Kenya×46

🇺🇬Uganda×6

🇸🇸South Sudan×2

Top 3

🥇
FMPeter Majur Manyang
🇸🇸SSD·2101
6.0pts·2744perf+35.4
🥈
Ngong Atem Gak
🇰🇪KEN·2004
5.0pts·2151perf+20.2
🥉
CMMadol Garang Panthou Joh
🇸🇸SSD·2094
5.0pts·2585perf+15.6

How it unfolded

Top 6 · 6 rounds

FM Peter Majur Manyang led from R4; +1.0-point edge over the runner-up.

Co-leaders

Manyang6Atem Gak5Joh5Ezekiel4.5Taji4.5Mumo4

R4–R6 · LEAD HELD

FM Peter Majur Manyang never relinquished the lead after R4; final gap +1.0 over the runner-up.

R4 · HEAD-TO-HEAD · WINNER VS 2ND

FM Peter Majur Manyang beat Ngong Atem Gak (White).

WIN STREAKS · 3 top finishers

FM Peter Majur Manyang 6 wins (R1–R6)Ngong Atem Gak 3 wins (R1–R3)CM Madol Garang Panthou Joh 5 wins (R2–R6)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1FMPeter Majur Manyang	*	1	—	1
2Ngong Atem Gak	0	*	—	—
3CMMadol Garang Panthou Joh	—	—	*	—
4Karani Ezekiel	0	—	—	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	Pts	Bu C1	Bu	SB	Perf	Δ
1	Peter Majur ManyangFM	2101	SSD	+23N	+21B	+6N	+2B	+4N	+7B	6.0	20.5	23.5	23.50	2744	+35.4
2	Atem Gak, Ngong	2004	KEN	+57N	+10B	+5N	−1N	+8B	+9B	5.0	22.5	22.5	16.50	2151	+20.2
3	Madol Garang Panthou JohCM	2094	SSD	F	+36B	+28N	+18B	+15N	+6B	5.0	16.5	18.5	16.50	2585	+15.6
4	Karani Ezekiel	1968	KEN	+29B	=16N	+8B	+24N	−1B	+15B	4.5	20.0	23.0	15.25	2049	+13.2
5	Abel Taji	1777	KEN	+59B	+37N	−2B	=22N	+24B	+12N	4.5	17.5	17.5	11.00	2153	+94.4
6	Gilruth, Peter	1977	KEN	+9N	+40B	−1B	+41N	+11B	−3N	4.0	21.0	23.0	12.00	1985	+4.0
7	Muli Faraja Mumo	1965	KEN	+11B	−8N	+25B	+42N	+30B	−1N	4.0	20.0	22.0	12.00	1912	-9.2
8	Omondi Stanley	1896	KEN	+31N	+7B	−4N	+36B	−2N	+28B	4.0	19.5	22.0	12.50	1977	+13.6
9	Achol Agot	1787	KEN	−6B	+14N	+38B	+56N	+22B	−2N	4.0	18.5	18.5	9.50	1760	-3.6
10	Chumba Allan	1889	KEN	+39B	−2N	=13B	=16N	+41B	+30N	4.0	18.0	20.0	11.25	1884	+1.0
11	Chvoro Viacheslav	1771	KEN	−7N	+18B	+21N	+27B	−6N	+32B	4.0	17.5	20.5	12.50	1896	+17.0
12	Njuki, Gabriel	2002	KEN	−15B	+39N	+22B	+26N	+40N	−5B	4.0	16.5	18.5	10.50	1833	-19.8
13	Mugambi Christian Mwamba	1736	KEN	−21N	+56B	=10N	=17B	+27N	+23B	4.0	16.5	16.5	9.75	1875	+39.2
14	Riungu Kevin	1607	KEN	+43N	−9B	−24N	+46N	+25B	+40B	4.0	14.0	16.0	9.00	1757	+15.6
15	Amos Wayne	1792	KEN	+12N	=17B	+16B	+30N	−3B	−4N	3.5	20.5	23.5	12.25	1979	+29.8
16	Ajiri Benjamin Netanyahu	1906	UGA	+32N	=4B	−15N	=10B	=36N	+31B	3.5	18.0	20.5	11.50	1858	-6.4
17	Mwabu, Timothy	1922	KEN	+25B	=15N	−30B	=13N	+37B	=20N	3.5	17.0	19.5	11.00	1807	-16.0
18	Simiyu Kibwana	1527	KEN	+49B	−11N	+45B	−3N	=44B	+37N	3.5	15.5	17.0	7.00	1731	+44.4
19	Manuel Mwine Bujara	1492	KEN	+50B	−25N	+49B	−37N	=26B	+36B	3.5	12.5	14.0	7.00	1674	+31.2
20	Ombiro Clifford	1644	KEN	F	F	+34N	+43B	+21N	=17B	3.5	11.5	11.5	9.75	2093	+32.6
21	Nashipae BellaWCM	1900	KEN	+13B	−1N	−11B	+44N	−20B	+41N	3.0	19.5	21.5	8.00	1737	-46.8
22	Hesham Mohammed Zemam	0	KEN	+48N	+31B	−12N	=5B	−9N	=24B	3.0	18.5	20.5	8.75	1757	0.0
23	Walter Oloo Juma	1852	KEN	−1B	+35N	−26B	+45N	+42B	−13N	3.0	18.0	20.0	7.00	1702	-41.6
24	Andrew Kibiwott Chepkerio	1659	KEN	+45B	=55N	+14B	−4B	−5N	=22N	3.0	18.0	18.5	7.75	1733	+17.6
25	Pero Derick Elvis	1750	UGA	−17N	+19B	−7N	+54B	−14N	+47B	3.0	17.0	18.0	6.50	1678	-10.8
26	Jesse Fabian	1708	KEN	F	+27B	+23N	−12B	=19N	=33B	3.0	16.5	16.5	9.25	1699	-2.4
27	FIDE 554025680	0	—	+41B	−26N	+39B	−11N	−13B	+44N	3.0	15.5	17.5	6.50	1680	0.0
28	Ssematimba John	1770	UGA	−37B	+42N	−3B	+51N	+47B	−8N	3.0	15.5	17.0	5.50	1715	-7.6
29	Mwashe, Philip	1782	KEN	−4N	+54B	−36N	=33B	=34N	+42B	3.0	15.0	16.0	6.00	1645	-20.2
30	Maurice Omondi Aduda	1641	KEN	+58N	+57B	+17N	−15B	−7N	−10B	3.0	15.0	15.0	3.50	1800	+46.4
31	Chege Ian Magu	1715	KEN	−8B	−22N	+53B	+49N	+38B	−16N	3.0	14.5	15.5	5.00	1101	-20.4
32	Claude Peter	1749	KEN	−16B	+47N	=37B	=38N	+56B	−11N	3.0	14.5	14.5	4.50	1709	-3.8
33	Jaeger Nyamongo Omari	1449	KEN	−35B	+51N	−41B	=29N	+45B	=26N	3.0	13.0	14.5	6.50	1564	+25.2
34	Apamo Shem Mali	1637	KEN	=38B	−44N	−20B	+50N	=29B	+56N	3.0	12.5	12.5	4.25	1533	-23.6
35	Danson Ryan Kimani	1690	KEN	+33N	−23B	F	F	+52N	+43B	3.0	9.0	9.0	6.00	1651	-3.6
36	Kizito Kangave	1692	UGA	+55B	−3N	+29B	−8N	=16B	−19N	2.5	19.0	19.5	5.25	1785	+11.2
37	Mbaabu Cyprian	1936	KEN	+28N	−5B	=32N	+19B	−17N	−18B	2.5	18.0	21.0	8.00	1658	-81.2
38	FIDE 697443	0	—	=34N	+48B	−9N	=32B	−31N	=39N	2.5	15.5	17.5	6.25	1641	0.0
39	Oluchiri Jeshurun Inyangala	1696	KEN	−10N	−12B	−27N	+48B	+49N	=38B	2.5	15.5	17.0	4.75	1707	-0.8
40	Sagwa, Hillary	1830	KEN	F	−6N	+44B	+47N	−12B	−14N	2.0	19.0	21.0	4.00	1662	-20.6
41	Oduol James	1569	KEN	−27N	+46B	+33N	−6B	−10N	−21B	2.0	17.0	19.0	5.00	1609	+0.4
42	David Simiyu Newton	1525	KEN	+46N	−28B	+43N	−7B	−23N	−29N	2.0	15.0	17.0	4.00	1032	-23.6
43	FIDE 554024226	0	—	−14B	+50N	−42B	−20N	+46B	−35N	2.0	14.5	16.0	3.50	817	0.0
44	Jacob Mandela	1600	KEN	=53N	+34B	−40N	−21B	=18N	−27B	2.0	14.5	15.5	5.25	1637	+3.6
45	Sardana Aseem	1431	KEN	−24N	+52B	−18N	−23B	−33N	+50B	2.0	14.0	15.0	2.50	817	-45.2
46	FIDE 554015413	0	—	−42B	−41N	+48N	−14B	−43N	+52B	2.0	12.0	13.0	3.00	1383	0.0
47	Jesse Jayden	1482	KEN	+52N	−32B	+54N	−40B	−28N	−25N	2.0	12.0	13.0	2.00	1500	+1.6
48	Okwiri Dhillo Emmanuel	1604	KEN	−22B	−38N	−46B	−39N	+53B	+51N	2.0	11.5	12.5	2.50	896	-14.8
49	Muli, Baraka Kimama	0	KEN	−18N	+58B	−19N	−31B	−39B	=53N	1.5	13.5	13.5	0.50	1328	0.0
50	FIDE 554025672	0	—	−19N	−43B	+58N	−34B	=51B	−45N	1.5	12.0	12.0	0.75	1300	0.0
51	Kayden Sankau Oloitiptip	0	KEN	−54N	−33B	+52N	−28B	=50N	−48B	1.5	10.5	11.5	1.75	806	0.0
52	William Gachari	0	KEN	−47B	−45N	−51B	+53N	−35B	−46N	1.0	10.5	11.5	1.00	734	0.0
53	Jayden Kihuria	0	KEN	=44B	F	−31N	−52B	−48N	=49B	1.0	9.5	9.5	1.75	1367	0.0
54	Joseph Kizito	1599	UGA	+51B	−29N	−47B	−25N	F	F	1.0	9.5	9.5	1.50	871	-24.4
55	Walela, Austin	1881	KEN	−36N	=24B	F	F	F	F	0.5	5.5	5.5	1.50	1483	-20.6
56	Maiyani Oloitiptip Trevor	1452	KEN	F	−13N	F	−9B	−32N	−34B	0.0	14.5	14.5	0.00	927	-27.6
57	Daahir Bashir Yusuf	1817	UGA	−2B	−30N	F	F	F	F	0.0	8.0	8.0	0.00	1023	-19.8
58	John Okello Oluoch	1412	KEN	−30B	−49N	−50B	F	F	F	0.0	6.0	6.0	0.00	841	-8.4
59	Gohil, Mehul	1965	KEN	−5N	F	F	F	F	F	0.0	4.5	4.5	0.00	977	-14.8

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Abel TajiKEN
+94.4
4.5 pts · #6
2Maurice Omondi AdudaKEN
+46.4
3.0 pts · #16
3Simiyu KibwanaKEN
+44.4
3.5 pts · #24

Top rating losers

1Mbaabu CyprianKEN
-81.2
2.5 pts · #27
2Nashipae BellaWCMKEN
-46.8
3.0 pts · #22
3Sardana AseemKEN
-45.2
2.0 pts · #58

Biggest upsets

R6+409 Elo gap
Simiyu Kibwana1527 beat Mbaabu Cyprian1936
R3+281 Elo gap
Maurice Omondi Aduda1641 beat Mwabu, Timothy1922
R5+256 Elo gap
Ombiro Clifford1644 beat WCMNashipae Bella1900