91st Greater Boston Open
By Massachusetts Chess Assoc | Sun, 2026-10-25 00:00 to Sun, 2026-10-25 23:59, Eastern Daylight Time | Registering | 3/200
| Name | 91st Greater Boston Open [Registering] |
| Organizer | Massachusetts Chess Assoc |
| Event Contacts | Massachusetts Chess Assoc [Email president@masschess.org][Phone 7742394959] |
| Event Time Zone | Eastern Daylight Time |
| Dates | Sunday, October 25, 2026 12:00 AM ~ Sunday, October 25, 2026 11:59 PM |
| Registration Deadline | Friday, October 23, 2026 11:59 PM |
| Event Address |
 170 Forest St, Marlborough, MA, USA, 01752
|
| Require Check In | No |
| Entry Fee | Due on registration |
| Unpaid Entries | Will be deleted without notice (Typically after 2 hours) |
| USCF Membership | Must not expire before event ends |
| Format | OTB (Over the Board) |
| Event Type | Open |
| Pairing Rule | Swiss |
| Rounds | 4 [Each sections may have different number of rounds] |
| Half-Point Byes | 1 Allowed [Each section may have different number of HPB's] |
| Time Control | Classical [G/60; d5] |
| Rating Type | USCF |
| Total Seats | 200 |
| Prize Fund | $3,000 [USD - US Dollar] |
| Flyer Link | https://www.masschess.org |
| Live Game | https://www.masschess.org |
| Pairing & Results | https://www.nachesshub.com/EventFiles?EventID=09067883-cd2d-4642-8e0a-39c4d74de0fc |
A Heritage Event OCT 25 MASSACHUSETTS US CHESS GRAND PRIX POINTS: 15 (ENHANCED) 91st Greater Boston Open 4SS, G/60, d5. Hilton Garden Inn, 170 Forest St., Marlborough MA 01752. 508-251-6716. $$G 3,000. 8 sects. Premier: $350-175, top Under 2300 $150. Under 2200: $250-150. Under 2000: $250-150. Under 1800: $250-125. Under 1600: $200-125. Under 1400: $200-100. Under 1200: $200-100. Under 1000: $150-75. Players may play up by a maximum of 200 rating points (published, live, or at time of registration). Unrated may play in Under 2000 or below, with these prize limits: $50 in U1000, $75 in U1200, $100 in U1400, $125 in U1600, $150 in U1800, $175 in U2000. Unpublished uschess.org ratings usually used if otherwise unrated. Foreign players, see foreignratings.com. EF: $45 if mailed by Monday 10/19 or online by Wednesday 10/21, $55 online by Friday 10/23 or at site. $10 discount to players in U1000 Section. GMs and IMs free. No credit cards at site; cash or check OK. Reg.: 8-9 a.m. Rds: 10-1-3:30-6. Other: Bye 1-4, limit 1, must commit before round 2, no half point byes for players receiving full point byes. MACA memb..required for Mass. residents ($12 adult, $6 jr. U18). Ent: Robert Messenger, 4 Hamlett Dr. Apt. 12, Nashua NH 03062 or online (PayPal) at www.MassChess.org. Make checks payable to MACA. Info: send email to info@masschess.org. W. |
|
1.
Premier
|
4 Rounds | 1 Byes | Classical Time Control
[G/60; d5]
| USCF Rated | Swiss Pairing
$350-175, top Under 2300 $150
|
|
2.
Under 2200
|
4 Rounds | 1 Byes | Classical Time Control
[G/60; d5]
| USCF Rated | Swiss Pairing
$250-150
|
|
3.
Under 2000
|
4 Rounds | 1 Byes | Classical Time Control
[G/60; d5]
| USCF Rated | Swiss Pairing
$250-150
|
|
4.
Under 1800
|
4 Rounds | 1 Byes | Classical Time Control
[G/60; d5]
| USCF Rated | Swiss Pairing
$250-125
|
|
5.
Under 1600
|
4 Rounds | 1 Byes | Classical Time Control
[G/60; d5]
| USCF Rated | Swiss Pairing
$200-125
|
|
6.
Under 1400
|
4 Rounds | 1 Byes | Classical Time Control
[G/60; d5]
| USCF Rated | Swiss Pairing
$200-100
|
|
7.
Under 1200
|
4 Rounds | 1 Byes | Classical Time Control
[G/60; d5]
| USCF Rated | Swiss Pairing
$200-100
|
|
8.
Under 1000
|
4 Rounds | 1 Byes | Classical Time Control
[G/60; d5]
| USCF Rated | Swiss Pairing
$150-75
|
General Information
Name
91st Greater Boston Open Registering
91st Greater Boston Open Registering
Organizer
Massachusetts Chess Assoc
Massachusetts Chess Assoc
Event Contacts
Massachusetts Chess Assoc [Email president@masschess.org][Phone 7742394959]
Massachusetts Chess Assoc [Email president@masschess.org][Phone 7742394959]
Time Zone
Eastern Daylight Time
Eastern Daylight Time
📅 Dates
10/25/2026 12:00 AM ~ 10/25/2026 11:59 PM
10/25/2026 12:00 AM ~ 10/25/2026 11:59 PM
Registration Deadline
10/23/2026 11:59 PM
10/23/2026 11:59 PM
📍 Location
170 Forest St, Marlborough, MA, USA, 01752
170 Forest St, Marlborough, MA, USA, 01752
💳 Entry Fee due on registration
! Unpaid Entries will be deleted after 2 hours
USCF Membership
Must not expire before event ends
Must not expire before event ends
Event Details
Format
OTB (Over the Board)
OTB (Over the Board)
Type
Open
Open
Pairing
Swiss
Swiss
Rounds
4
4
HPB
1
1
Capacity
200
200
⏱️ Time Control
Classical [G/60; d5]
Classical [G/60; d5]
Rating
USCF
USCF
💰 Prize Fund
3000.00 (USD)
3000.00 (USD)
Links
Description
A Heritage Event
OCT 25 MASSACHUSETTS
US CHESS GRAND PRIX POINTS: 15 (ENHANCED)
91st Greater Boston Open
4SS, G/60, d5. Hilton Garden Inn, 170 Forest St., Marlborough MA 01752. 508-251-6716. $$G 3,000. 8 sects. Premier: $350-175, top Under 2300 $150. Under 2200: $250-150. Under 2000: $250-150. Under 1800: $250-125. Under 1600: $200-125. Under 1400: $200-100. Under 1200: $200-100. Under 1000: $150-75. Players may play up by a maximum of 200 rating points (published, live, or at time of registration). Unrated may play in Under 2000 or below, with these prize limits: $50 in U1000, $75 in U1200, $100 in U1400, $125 in U1600, $150 in U1800, $175 in U2000. Unpublished uschess.org ratings usually used if otherwise unrated. Foreign players, see foreignratings.com. EF: $45 if mailed by Monday 10/19 or online by Wednesday 10/21, $55 online by Friday 10/23 or at site. $10 discount to players in U1000 Section. GMs and IMs free. No credit cards at site; cash or check OK. Reg.: 8-9 a.m. Rds: 10-1-3:30-6. Other: Bye 1-4, limit 1, must commit before round 2, no half point byes for players receiving full point byes. MACA memb..required for Mass. residents ($12 adult, $6 jr. U18). Ent: Robert Messenger, 4 Hamlett Dr. Apt. 12, Nashua NH 03062 or online (PayPal) at www.MassChess.org. Make checks payable to MACA. Info: send email to info@masschess.org. W.
Sections & Entry Fees
1.
Premier
4 Rds
1 HPB
Classical
USCF
G/60; d5
🏆 $350-175, top Under 2300 $150
Entry Fees (USD):
• $0.00 [ Before 10/23/2026 11:59:00 PM FIDE Title = GM ]
• $0.00 [ Before 10/23/2026 11:59:00 PM FIDE Title = IM ]
• $45.00 [ Before 10/21/2026 11:59:00 PM USCF Regular Rating 2000 - 9999 ]
• $55.00 [ Before 10/23/2026 11:59:00 PMAfter 10/21/2026 11:58:59 PM USCF Regular Rating 2000 - 9999 ]
2.
Under 2200
4 Rds
1 HPB
Classical
USCF
G/60; d5
🏆 $250-150
Entry Fees (USD):
• $45.00 [ Before 10/21/2026 11:59:00 PM USCF Regular Rating 1800 - 2199 ]
• $55.00 [ Before 10/23/2026 11:59:00 PMAfter 10/21/2026 11:58:14 PM USCF Regular Rating 1800 - 2199 ]
3.
Under 2000
4 Rds
1 HPB
Classical
USCF
G/60; d5
🏆 $250-150
Entry Fees (USD):
• $45.00 [ Before 10/21/2026 11:59:00 PM USCF Regular Rating 1600 - 1999 ]
• $45.00 [ Before 10/21/2026 11:59:00 PM USCF Regular Rating 0 - 0 ]
• $55.00 [ Before 10/23/2026 11:59:00 PMAfter 10/21/2026 11:58:00 PM USCF Regular Rating 1600 - 1999 ]
• $55.00 [ Before 10/23/2026 11:59:00 PMAfter 10/21/2026 11:58:06 PM USCF Regular Rating 0 - 0 ]
4.
Under 1800
4 Rds
1 HPB
Classical
USCF
G/60; d5
🏆 $250-125
Entry Fees (USD):
• $45.00 [ Before 10/21/2026 11:59:00 PM USCF Regular Rating 1400 - 1799 ]
• $45.00 [ Before 10/21/2026 11:59:00 PM USCF Regular Rating 0 - 0 ]
• $55.00 [ Before 10/23/2026 11:59:00 PMAfter 10/21/2026 11:58:43 PM USCF Regular Rating 0 - 0 ]
• $55.00 [ Before 10/23/2026 11:59:00 PMAfter 10/21/2026 11:58:51 PM USCF Regular Rating 1400 - 1799 ]
5.
Under 1600
4 Rds
1 HPB
Classical
USCF
G/60; d5
🏆 $200-125
Entry Fees (USD):
• $45.00 [ Before 10/21/2026 11:59:00 PM USCF Regular Rating 0 - 0 ]
• $45.00 [ Before 10/21/2026 11:59:00 PM USCF Regular Rating 1200 - 1599 ]
• $55.00 [ Before 10/23/2026 11:59:00 PMAfter 10/23/2026 11:58:48 PM USCF Regular Rating 0 - 0 ]
• $55.00 [ Before 10/23/2026 11:59:00 PMAfter 10/21/2026 11:58:01 PM USCF Regular Rating 1200 - 1599 ]
6.
Under 1400
4 Rds
1 HPB
Classical
USCF
G/60; d5
🏆 $200-100
Entry Fees (USD):
• $45.00 [ Before 10/21/2026 11:59:00 PM USCF Regular Rating 1000 - 1399 ]
• $45.00 [ Before 10/21/2026 11:59:00 PM USCF Regular Rating 0 - 0 ]
• $55.00 [ Before 10/23/2026 11:59:00 PMAfter 10/21/2026 11:58:12 PM USCF Regular Rating 1000 - 1399 ]
• $55.00 [ Before 10/23/2026 11:59:00 PMAfter 10/21/2026 11:58:07 PM USCF Regular Rating 0 - 0 ]
7.
Under 1200
4 Rds
1 HPB
Classical
USCF
G/60; d5
🏆 $200-100
Entry Fees (USD):
• $45.00 [ Before 10/21/2026 11:59:00 PM USCF Regular Rating 800 - 1199 ]
• $45.00 [ Before 10/21/2026 11:59:00 PM USCF Regular Rating 0 - 0 ]
• $55.00 [ Before 10/23/2026 11:59:00 PMAfter 10/21/2026 11:58:32 PM USCF Regular Rating 800 - 1199 ]
• $55.00 [ Before 10/23/2026 11:59:00 PMAfter 10/21/2026 11:58:08 PM USCF Regular Rating 0 - 0 ]
8.
Under 1000
4 Rds
1 HPB
Classical
USCF
G/60; d5
🏆 $150-75
Entry Fees (USD):
• $35.00 [ Before 10/21/2026 11:59:00 PM USCF Regular Rating 0 - 999 ]
• $45.00 [ Before 10/23/2026 11:59:00 PMAfter 10/21/2026 11:58:40 PM USCF Regular Rating 0 - 999 ]