CChessStats

WB State Under-9 Open FIDE Rated Chess Championship 2026

Open SwissStandard

132 players participated in this 8-round tournament, held from 28 May 2026 to 31 May 2026 in Kolkata, India. Top 10 Elo average was 1558, and top seed was Aaradhyo Guin (🇮🇳 IND, 1714).

Ishaan Raychaudhuri (🇮🇳 IND, 1569) won with 7.5/8, ahead of Adhrit Medda (7.5) and Kazi Adyan Ahmed (7.0). Raychaudhuri shared the lead from round 7, winning on tie-break.

The biggest upset came in round 3: Reyaan Gharai (1403) beat Aniruddha Mukherjee (1622), a +219-point gap.

Location
🇮🇳Kolkata, India
Dates
28 May 2026 → 31 May 2026
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 8 rounds
Top seed
🇮🇳Aaradhyo Guin1714
Avg top 10
1,558
Participants
132
Federations · 1 represented
🇮🇳India×47
Top 3

How it unfolded

Top 6 · 8 rounds

Tight race until R8; 2 players tied at 7.5/8, decided on Buchholz. Title race narrowed from 6 co-leaders at R4 to 2 at the finish.

Co-leaders
110
43
18
6
2
1
3
2
2468R1R2R3R4R5R6R7R8
R8 · TIEBREAK CLUSTER

2 players finish on 7.5/8. Raychaudhuri takes the title on Buchholz Cut1 (43.5).

R4 · HEAD-TO-HEAD · WINNER VS 2ND

Ishaan Raychaudhuri drew with Adhrit Medda (Black).

WIN STREAKS · 3 top finishers

Ishaan Raychaudhuri 3+4 wins (R1–R3, R5–R8)Adhrit Medda 3+4 wins (R1–R3, R5–R8)Kazi Adyan Ahmed 6 wins (R1–R6)

Key matchups · top 4

Head-to-head between the four finishers

Grille américaine

#PlayerEloFedR1R2R3R4R5R6R7R8PtsBu C1BuSBPerfΔ
1Ishaan Raychaudhuri1569IND+132B+18N+43B=2N+6B+23N+3B+9N7.543.544.040.251885+39.8
2Adhrit Medda1448IND+118N+41B+112N=1B+76N+21B+5N+7B7.538.541.537.751800+63.2
3Kazi Adyan Ahmed1551IND+116B+89N+99B+4N+20B+9B1N+12N7.040.043.035.501730+36.8
4Nirjhar Roy1436IND+114N+54B+40N3B+41N+32B+24N+15B7.039.042.035.001485+5.2
5Reyaan Gharai1403IND+130B+64N+27B+14N=22B+11N2B+21B6.540.541.531.251712+96.8
6Ghosh, Parthajit1424IND+127N+46B=49N+17B1N+76B+27B+29N6.539.041.031.001596+18.0
7Jainesh Bhaumik1430IND+48B+113N+44B=37N+98B+22N+26B2N6.537.040.030.001656+61.2
8Vedant Tulsyan0IND+?B=?N30B+?N+102B+34N+23B+?N6.520.020.014.5015500.0
9Aaradhyo Guin1714IND+128B+90N+25B+13N+26B3N+38B1B6.040.542.528.001574-29.4
10Boitan Saha1437IND+53B=71N+36B+102N=11B=20N+30B=19N6.038.542.030.751539+5.6
11Sharma, Parth1539IND=81N+28B+63N+78B=10N5B+51N+43N6.037.041.529.751227-32.8
12Manomay Mondal1429IND=78N=55B+51N+46B+105N+49B+40N3B6.036.540.028.25751-13.2
13Aditya Bose1478IND+92N+104B+72N9B+50N+18B15N+52B6.036.540.028.00766-31.2
14Madhav Mundhara1493IND+119N+52B+29N5B=87N+66B=17N+40B6.036.539.528.00603-24.8
15Ghosh, Kounish1418IND+57B+88N+86B=98N=37B+64N+13B4N6.035.539.027.751484+14.8
16Adhiraj Bhadra1433IND+115B+73N+84B22N+48BF+74N+47N6.031.531.526.00762-13.2
17Sharnav Roy0IND+?B+?B=21N6N+?B+25N=14B+38N6.028.528.516.2514440.0
18Aryan Reza0IND+?B1B+?N+?N+84B13N+45B+37N6.027.527.514.001398-7.2
19FIDE 577093194040N+?B+?N+80B+?N=?B+?N=10B6.015.515.57.5015120.0
20Aranya Chatterjee0IND+?N+?B+?N+?B3N=10B=?N+?B6.013.013.03.0015370.0
21Kabir Islam1452IND+93B+95N=17B+30N+33B2N+31B5N5.540.544.527.50626-43.2
22Shivansh Basu1562IND+67N+69B+110N+16B=5N7B29N+75N5.538.041.025.751422-22.4
23Yashjeet Dutta1456IND+94N=50B+42N+66B+62N1B8N+67B5.537.541.525.00769-14.0
24FIDE 5640341860+?B=31N+91B=71N+45B+37N4B=35N5.536.536.521.7514790.0
25Arinjoy Patra1406IND+77N+96B9N=29B+82N17B+72N+66B5.535.539.524.759140.0
26Souraansh Sarkar1504IND+79N+131B+65N+61B9N+85B7N=32B5.535.536.521.251399-17.2
27Aniruddha Mukherjee1622IND+106N+117B5N+122B=49N+87B6N+48N5.533.536.521.00614-61.6
28Mondal, Vivaan0IND+121B11N+128B+113N=59B30N+?B+73N5.529.029.015.007390.0
29FIDE 5470764610+?B+?N14B=25N+?B+98N+22B6B5.527.027.011.7514770.0
30FIDE 5770940340=?N+?B+8N21B+?N+28B10N+?B5.523.523.512.006450.0
31FIDE 5770396370+?N=24B=?N=65B+?N+?B21N+61B5.520.020.09.5014770.0
32Ayaan0IND+?B+?N98B+?N+?B4N+88B=26N5.520.020.06.751208-44.4
33Saha, Ranajay0IND+?N=62B+?N+?B21N?B+63N+99B5.518.018.010.256570.0
34FIDE 577042786042N+?B+?N+?B=?N8B+68N+?B5.516.016.04.5015190.0
35Souradeep Das0IND=63N+?B?N+?B=?N+50B+?N=24B5.515.015.010.0015100.0
36FIDE 5770428910=?N+?B10N68B+?N+?B+?N+?B5.510.510.50.006370.0
37Sinha Mahapatra, Kairab1521IND+51N+101B+109N=7B=15N24B+46N18B5.037.540.522.751424-10.4
38FIDE 577077601046N+127B+115N+72B+?N+42B9N17B5.031.531.514.509140.0
39FIDE 531066135041N+114B+54N+79B?N=67B+103N=56B5.030.530.520.756620.0
40FIDE 5770763970+19B+?N4B+99N+?B+?N12B14N5.028.528.59.5013690.0
41Devrup Ghosh0IND+39B2N+?B+86N4B+100N?B+?N5.027.027.012.506830.0
42FIDE 4290652240+34B+?N23B+60N+43B38N+?B?N5.026.026.015.506430.0
43Aditya Yadav0IND+?B+?N1N+74B42N+112B+?N11B5.026.026.07.507540.0
44Srijan Jana0IND+87N+?B7N=52B+63N+62B?N=?B5.024.524.515.506300.0
45Mandal, Anish0IND+?N61B+?N+110B24N+?B18N+89B5.023.023.07.006280.0
46Paul, Saunak0IND+38B6N+?B12N+?B+?N37B+?N5.022.522.55.0012910.0
47FIDE 5770931510?N+?B+117N+?B85N+69B+71N16B5.022.022.012.006330.0
48Koonj Agarwal0IND7N+?B+?N+?B16N+?B+85N27B5.022.022.04.0013190.0
49FIDE 5470800780+?B+?N=6B+111N=27B12N?B+?N5.021.021.09.0012830.0
50Devansh Agarwal0IND+?B=23N=?B+?N13B35N+?B+84N5.021.021.06.751330-16.4
51Harshvardhan Singh0IND37B+?N12B+?N+?B+?N11B+86N5.021.021.04.006960.0
52FIDE 5770431460+?B14N+?B=44N=100B+?N+?B13N5.020.520.54.256860.0
53FIDE 577043073010N=?B68N+?B+?N=65B+110N+?B5.018.018.05.256370.0
54FIDE 5770939250+?B4N39B+?N+?B=86N=?B+?N5.016.016.02.0015000.0
55Karmakar, Rudranil0IND=?B=12N+?B=?N=?N?B+?N+85B5.010.010.07.0014590.0
56Ayansh Saha0IND+?N?B+?N+?B?B+?N=64B=39N5.09.59.54.757060.0
57FIDE 577096819015N+?B+?B?N99B+?N+?B+?N5.09.59.50.006240.0
58FIDE 5580872570?N+?B+101N+69B+?N?B+?N?B5.08.08.08.007190.0
59FIDE 5470736750+?N+?B?N+?B=28N+?B=?N?B5.05.55.52.7512280.0
60FIDE 5470539680+?N=?B=?N42B?N+?B+?N+?B5.05.05.00.0015130.0
61Ivan Basak1428IND+75B+45N+100B26N64B+70N=73B31N4.534.037.519.75704-16.0
62FIDE 5770933480+?B=33N+?B+70N23B44N75B+102N4.528.528.510.756560.0
63FIDE 5470555290=35B+?N11B+129N44B+?N33B+100N4.527.027.07.757390.0
64FIDE 5770934100+?N5B+?N+109B+61N15B=56N?B4.525.025.010.0012490.0
65FIDE 5770928720+?B+?N26B=31N70B=53N+?B=77N4.525.025.07.507040.0
66FIDE 5470763720+?B=?N+?B23N+111B14N+?B25N4.520.020.03.006520.0
67FIDE 577043154022B+?N+?B?N+?B=39N+98B23N4.519.519.56.0013820.0
68FIDE 5370893070=?B?N+53B+36N?B+123N34B+?N4.519.019.013.507640.0
69FIDE 5370594670+?B22N+?B58N+?B47N=?B+107N4.519.019.03.507620.0
70FIDE 5770429800=?N+?B+?N62B+65N61B?N+101B4.517.017.08.006280.0
71FIDE 5640664360+?N=10B+?N=24B=?B=?N47B=?N4.516.516.55.7515080.0
72FIDE 5470736080+?B+?N13B38N+?B=?N25B+?N4.516.516.50.0011600.0
73Debdipto Banerjee0IND+?N16B?N+?B+?N+?B=61N28B4.516.016.02.2512380.0
74FIDE 5770939680?B+?N+90B43N+?B+?N16B=?N4.515.015.04.006330.0
75FIDE 537007378061N+?B+?B?N+?N=?B+62N22B4.514.514.54.5011510.0
76Shouryadip Banerjee0IND+?B+?N+?B=?N2B6N+?B?N4.514.014.00.0013650.0
77Maiti, Shivadyuti0IND25B=?N+?N?B=?N+?B+109N=65B4.513.013.05.256090.0
78FIDE 5370307600=12B+?N+?B11N?B?N+?B+?N4.512.012.03.0012380.0
79FIDE 531018831026B+?N+?B39N+?N?B=?N+?B4.510.510.50.007040.0
80FIDE 5470539760+?N=?B=?B19N+97B=?N?B+?N4.510.010.04.006160.0
81FIDE 5470828790=11B?N+?B?N=?B=?N+?B+?N4.56.06.03.0012920.0
82FIDE 5770940850=?B?N+?B+?N25B?N+?B+?N4.55.55.50.006060.0
83FIDE 4290965450?B?N+?N=?B+?N+101B+?N?B4.53.53.53.5014140.0
84FIDE 5770351940+?N+85B16N+103B18N?B+90N50B4.028.528.511.506330.0
85FIDE 5310922410+?B84N+?B+88N+47B26N48B55N4.028.528.59.007040.0
86Urjit Ghosh0IND+?N+?B15N41B+116N=54B=87N51B4.028.028.07.506180.0
87FIDE 577043090044B+?N+?B+?N=14B27N=86B?N4.020.520.55.0013650.0
88FIDE 5640409680+?N15B+?N85B+?N+109B32N?B4.018.518.53.006180.0
89FIDE 5370700100+?N3B=?N?B+?B=91N+?B45N4.016.016.02.007510.0
90FIDE 5580941640+?B9B74N?N+?B+?N84B+?N4.014.514.50.009140.0
91FIDE 5470800940+?N=?B24N?B+?N=89B?N+109B4.012.512.55.0014110.0
92FIDE 577082869013B?N+?B+?N=?B=111N?B+?N4.09.09.01.506780.0
93FIDE 577010310021N+?B=?B=?N+110N?B?N+?B4.08.58.53.006520.0
94FIDE 547090359023B?N=?B+?N+?B=?N+?B?N4.05.55.50.007100.0
95FIDE 5580935240+?N21B?N+?B?N+?B?N+?B4.05.55.50.006520.0
96FIDE 5470551700+?B25N+?B?N+?B?N+?B?N4.05.55.50.006110.0
97FIDE 487925940+?N?B?N+?B80N+?B+?N?B4.04.54.50.007210.0
98Nag, Saptarshi1502INDF+103B+32N=15B7N29B67N+104B3.535.035.015.501231-28.8
99FIDE 5370700450F+?B3N40B+57N+105B=?N33N3.526.026.08.507510.0
100FIDE 5470540180+?N+?B61N=?B=52N41B=104N63B3.522.522.54.256280.0
101FIDE 5470800860+?B37N58B=?N+?B83N+?B70N3.519.019.00.007210.0
102FIDE 5470048940=?N+?B+?N10B8N?B+?N62B3.517.017.00.0014700.0
103FIDE 5470555960+?B98N+?B84N=?B+129N39B?N3.514.014.01.507020.0
104FIDE 4290104380+?B13N?B=?N+?B=?N=100B98N3.513.013.01.756900.0
105FIDE 5770429720?B+?N+?B+?N12B99N=?B?N3.59.59.50.006290.0
106FIDE 577093623027B?N+?B=?N+?B?N+?B?N3.55.55.50.007560.0
107FIDE 5770939920?N?B+?N=?B?B+?N+?N69B3.54.54.50.006620.0
108FIDE 5470800510?N?B+?N+?B?N=?B+?N?B3.50.00.00.006650.0
109FIDE 881273460+?B+?N37B64N+120B88N77B91N3.025.025.03.007210.0
110FIDE 5770724800+?B+?N22B45N93B+120N53BF3.022.522.53.007620.0
111Amitrajit Kundu0IND+?N+?B=?N49B66N=92BFF3.013.513.52.0015210.0
112FIDE 5470017120+?B+?N2B+?N?B43N?B?N3.012.512.50.006390.0
113FIDE 5770929610+?N7B+?N28B?N?N+?B?B3.012.012.00.006300.0
114FIDE 57709293704B39N+?B?N?B+?N=?B=?N3.012.012.00.006360.0
115FIDE 577042921016N+?B38B+?N?B+?N?B?N3.011.011.00.006330.0
116FIDE 54707366703N+?B?B+?N86B?N?B+?N3.011.011.00.007580.0
117FIDE 5770933640+?B27N47B+?N+?B?N?B?N3.010.510.50.008220.0
118FIDE 57709291002B?N?B+?N?B+?N?B+?N3.07.57.50.006480.0
119FIDE 577093160014B?N+?B?N+?B?N?B+?N3.06.06.00.006930.0
120FIDE 5770427270?N+?B+?N?B109N110B+?N?B3.06.06.00.006110.0
121FIDE 577012712028N=?B+?N?B?N=?B+?N?B3.05.55.50.006620.0
122FIDE 5770932240?N+?B+?B27N?B+?N?B?N3.05.55.50.007580.0
123FIDE 5770964600+?N?B=?N+?B?N68B?N=?B3.04.54.50.007190.0
124FIDE 5770938520+?B?N?B+?N?B?N?N+?B3.00.00.00.006160.0
125FIDE 5770938870?B+?N?B?N?B?N+?N+?B3.00.00.00.006160.0
126FIDE 5770125770?N?B?N?B+?N=?B+?N?B2.50.00.00.007210.0
127FIDE 57709358506B38N?N+?B?N?B+?N?B2.011.511.50.006240.0
128FIDE 57709326709N+?B28N?B+?N?B?N?B2.011.511.50.009140.0
129FIDE 5770928800=?N?B+?N63BF103BFF1.58.08.00.007630.0
130FIDE 57704284005N?B?N?BF?N?B+?B1.06.56.50.006030.0
131FIDE 5770935420+?B26NFFFFFF1.05.55.50.007040.0
132FIDE 57709342901N?B=?N?B?N?BF?N0.57.57.50.007690.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets