March 2020 - 28
Bridge Bots Battle in San Francisco
The 23rd annual World ComputerBridge Championship crowned a new
champion. Micro Bridge, developed in
Japan, emerged the winner after six
days of play during the San Francisco
North American Bridge Championships.
The seven entries developed by international individuals or teams were:
⦁ Meadowlark Bridge (U.S.)
⦁ Micro Bridge (Japan)
⦁ Q-Plus Bridge (Germany)
⦁ RoboBridge (Netherlands)
⦁ Synrey Bridge - runner-up for the
past two years (China)
⦁ TCS BridgeBot (India)
⦁ Wbridge5 - three-time defending
champion (France)
Each entry played as a team of four
identical bridge bots.
The round-robin phase ended with
the top four bot teams advancing to the
64-board semifinal knockout stage,
where Synrey Bridge defeated Q-Plus
Bridge, 175-133, and Micro Bridge
ousted tournament favorite Wbridge5,
182-140.
Micro Bridge overwhelmed Synrey
Bridge in the final, 120-35. A big win
for the Micro Bridge team, having lost
the past five years in their semifinal or
final match.
An interesting play problem in the
third quarter of the semifinals demonstrates some good bot "thinking" by
Q-Plus Bridge.
Dlr: North ♠ K J 10 2
Vul: E-W ♥ 10
Board 9
♦Q32
♣ Q J 10 5 3
♠Q54
♠96
♥Q95
♥A87642
♦ 10 6 4
♦K985
♣A864
♣9
♠A873
♥KJ3
♦AJ7
♣K72
28 Bridge Bulletin March 2020
West North
Synrey Q-Plus
Q-Plus Synrey
Pass
Pass
2♣
Pass
4♠
East
Synrey
Q-Plus
Pass
Pass
All Pass
South
Q-Plus
Synrey
1NT
2♠
Opening lead: ♦4 by Synrey, ♦6 by
Q-Plus Bridge
Q-Plus Bridge won the ♦J at trick
one. While there are a number of lines
of play, one possibility is to pull trumps
by taking the trump finesse toward
the safe hand, that is, toward the hand
that has the ♦K. If that finesse loses,
declarer may still have time to set up
the clubs for a diamond pitch, as the
defense may not be able to set up a
diamond winner in time. Even if the
finesse is taken through West and loses
to East's queen, barring a quick club
ruff, a heart return may set up a heart
winner for declarer to make its contract.
Generally a robot's analysis would
result in taking the trump finesse
equally each way, as it would not place
the ♦K in one hand more than the
other. However, Q-Plus Bridge adds to
its "thinking" process the tendency of
a defender, given the auction, to choose
a safe lead, so hands with the ♦K
and without a heart or club honor are
reduced in probability. With East more
likely to hold the ♦K, Q-Plus Bridge
took the trump finesse against West:
plus 450.
Synrey Bridge fails to take inference
from the lead, and finessed through
East, losing to the ♠Q. A diamond
return set the contract one: minus 50
and 11 IMPs to Q-Plus Bridge.
In the other match, with the same
auction, Micro Bridge led the ♦4
against Wbridge5's 4♠ contract.
Wbridge5 took the losing trump finesse, and with a diamond return, was
down one, minus 50.
At the other table, North-South
reached 4♠ after WBridge5 opened
BY AL LEVY
2♥ as East. West led a heart to East's
ace; East returned a club to partner's ace for a club ruff. Micro Bridge
declarer won the diamond return and
played three rounds of trump, finessing
against West: plus 420 and 10 IMPs to
Micro Bridge.
Micro Bridge's good decisions on
slams helped it to victory. Finding the
best suit for slam in the final netted
Micro Bridge 14 IMPs on this deal:
Dlr: South ♠ A 10
Vul: N-S ♥ 10 9 8 5 2
♦874
♣K64
♠K843
♠Q952
♥4
♥AKQ
♦AKQ2
♦ J 10 6 5 3
♣A832
♣J
♠J76
♥J763
♦9
♣ Q 10 9 7 5
West North
Micro Synrey
East
Micro
1♦
3♠
1♠
6♦
Pass
Pass
South
Synrey
Pass
Pass
All Pass
At both tables, with the same first
three bids, the 4-4 spade fit was found.
Micro Bridge made the better slam
decision, playing in 6♦, the solid ninecard fit, while Synrey Bridge played in
6♠, the less robust eight-card fit. 6♦
was cold on any lead (Synrey actually
led the ♠A), while 6♠ went down on
the diamond ruff.
The championship was sponsored
by the ACBL and World Bridge Federation, and run by organizer Al Levy. For
all the results of this year's event, as
well as past championship results and
interesting articles on bot play, go to
bridgebotchampionship.com.
◾
http://www.bridgebotchampionship.com
March 2020
Table of Contents for the Digital Edition of March 2020
In First Seat - Paul Linxwiler
Inbox -Letters to the Editor
Columbus NABC
Paragon of Fairness
Mr. Everything -William Stein is 2020 Goodwill Member of the Year
Mark Itabashi wins Barry Crane Top 500
Team Lavazza wins Reisinger
Junior Giants
Limericks
Bridge Bots Battle in San Francisco
Seattle Stars
To be the best, play the best
ACBL LIbe
Club News
Ruling the Game
The Bidding Box
It's Your Call
Card Play 101 - by Phillip Alder
Parrish the Thought - Adam Parrish
Reasoning with Robert - Robert Todd
Startup Bridge by Lynn Berg
Ask Jerry - by Jerry Helms
Bidding Basics by Larry Cohen
Lessons Learned by Michael Berkowitz
Mike's Bridge Lesson - Mike Lawrence
Chalk Talk- Eddie Kantar
West Hands -Bidding Box
Boehm on Bridge
The Real Deal - by Larry Cohen
Misplay these Hands with Me - by Mark Horton
East Hands -Bidding Box
Challenge of the Month
Obit- Bill Buttle (1940-2020)
Better Bridge with Bergen-Marty Bergen
Bidding Matters - by Karen Walker
Test Your Play
Mike's Advice - by Mike Lawrence
Solutions to Test Your Play
My Bridge and Yours - by Frank Stewart
Dear Billy - by Billy Miller
Bridge with the Abbot - by David Bird
George's World - by George Jacobs
Life Master Milestones
New Life Masters
Big Games
In Memoriam
Obit - Edward Marzo (1928-2019)
Obit - Arnold "Arny" Leavitt (1932-2020)
Obit -Lou Ann O'Rourke (1934-2019)
Obit -Robert M. Otto (1942-2020)
Richard Troxel (1932-2019)
Tournament Directory
March 2020 - 1
March 2020 - 2
March 2020 - 3
March 2020 - 4
March 2020 - 5
March 2020 - In First Seat - Paul Linxwiler
March 2020 - Inbox -Letters to the Editor
March 2020 - 8
March 2020 - Columbus NABC
March 2020 - Paragon of Fairness
March 2020 - 11
March 2020 - Mr. Everything -William Stein is 2020 Goodwill Member of the Year
March 2020 - Mark Itabashi wins Barry Crane Top 500
March 2020 - 14
March 2020 - 15
March 2020 - 16
March 2020 - 17
March 2020 - Team Lavazza wins Reisinger
March 2020 - 19
March 2020 - 20
March 2020 - 21
March 2020 - 22
March 2020 - 23
March 2020 - 24
March 2020 - Junior Giants
March 2020 - Limericks
March 2020 - 27
March 2020 - Bridge Bots Battle in San Francisco
March 2020 - 29
March 2020 - Seattle Stars
March 2020 - To be the best, play the best
March 2020 - ACBL LIbe
March 2020 - 33
March 2020 - Club News
March 2020 - 35
March 2020 - Ruling the Game
March 2020 - The Bidding Box
March 2020 - 38
March 2020 - 39
March 2020 - It's Your Call
March 2020 - 41
March 2020 - 42
March 2020 - 43
March 2020 - Card Play 101 - by Phillip Alder
March 2020 - Parrish the Thought - Adam Parrish
March 2020 - Reasoning with Robert - Robert Todd
March 2020 - Startup Bridge by Lynn Berg
March 2020 - Ask Jerry - by Jerry Helms
March 2020 - Bidding Basics by Larry Cohen
March 2020 - 50
March 2020 - Lessons Learned by Michael Berkowitz
March 2020 - Mike's Bridge Lesson - Mike Lawrence
March 2020 - West Hands -Bidding Box
March 2020 - Boehm on Bridge
March 2020 - East Hands -Bidding Box
March 2020 - Obit- Bill Buttle (1940-2020)
March 2020 - Better Bridge with Bergen-Marty Bergen
March 2020 - Bidding Matters - by Karen Walker
March 2020 - Test Your Play
March 2020 - Mike's Advice - by Mike Lawrence
March 2020 - Solutions to Test Your Play
March 2020 - My Bridge and Yours - by Frank Stewart
March 2020 - Dear Billy - by Billy Miller
March 2020 - Bridge with the Abbot - by David Bird
March 2020 - 65
March 2020 - Life Master Milestones
March 2020 - 67
March 2020 - 68
March 2020 - New Life Masters
March 2020 - Big Games
March 2020 - 71
March 2020 - Obit - Arnold "Arny" Leavitt (1932-2020)
March 2020 - Richard Troxel (1932-2019)
March 2020 - Tournament Directory
March 2020 - 75
March 2020 - 76
March 2020 - 77
March 2020 - 78
March 2020 - 79
March 2020 - 80
March 2020 - 81
March 2020 - 82
March 2020 - 83
March 2020 - 84
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