Join Bridge Winners
ACBL practice game 5, day 1
(Page of 14)

I envy Richard Lawson who was writing very interesting articles about his play with robots, so I decided to steal the idea and describe my own experience from the first day of the 5th ACBL robot practice tournament.

I had a very specific problem with that task - my style of playing with robots is not “family friendly”. As a result I had to constantly remind myself during the game that I am planning to make my boards public in the place with open access for children. It worked well ... partially. At least my results for that tournament were much better than usual.

As for the style. Er... Sorry for comparison. Several month ago on a Russian segment of Internet was popular an educational video made by Alex Grey (Russian colleague of Stormy Daniels) to teach kids English. She actually did a very good job, but... Well, I was trying to be a good person too, but looking at my games I still think that some of them are on the borderline of pornography. If you are 21 you you can turn the page and look at them.

Board 1

Robot
754
K2
AJ107
6543
Robot
863
5
K943
AKJ108
Robot
QJ109
QJ10984
Q
72
Olegru
AK2
A763
8652
Q9
W
N
E
S
P
P
1
P
3
P
3NT
P
P
P
D
1
3NT South
NS: 0 EW: 0
4
3
9
A
3
1
0
2
10
K
Q
1
2
0
3
4
8
A
0
2
1
7
8
10
K
3
3
1
Q
6
8
7
3
4
1
9
3
A
2
1
5
1
K
Q
5
5
1
6
1
J
J
6
4
1
7
1
10
J
2
7
1
8
1
5
8
A
2
3
9
1
7
K
4
10
0
9
2
J
9 tricks claimed
N/S +400
12

The first board was boring. There are 8 tricks from the top and diamond finesse brings them to 9. I took the first spade, played  to the King on the second round,  back to my 8, West robot took the trick, opened , so 9 tricks it was.

Checking scoresheet. 76.8%. Acceptable. Many people did the same, but two players managed to take 10 tricks.

One of them cashed Q on the trick 2 and only after it played  to the King. What difference it made? Well, after he/she played  to the 8 on the next round, West robot ducked, presenting tenth trick. 

Another winning play was even more subtle. Me, and all the other lazy bums, played the smallest  from the table on the trick one. The better player tried 8. You see no difference? Me too. But West robot behaved differently. After taking the diamond on the third round it continued  instead of cleaning spades. Another 10 tricks.

76.8% for 3NT made still was a very good score,  because many players did not bid game with 13 moderate points across passed partner. They sign off in 3 and got 50% for overtrick or 35.4% for just making.

Some other people played 3NT, but did not find it comfortable to finesse to  King right away; they might win the game by finessing it later, but seems like it was even less comfortable for them. 15.4% for down 1. 

There were some other strange results I did not bother to check them.

Board 2.

Robot
963
102
A87
A10854
Robot
KQ105
764
J1042
72
Robot
74
AJ5
Q965
KQ63
Olegru
AJ82
KQ983
K3
J9
W
N
E
S
1
X
1NT
2
P
P
P
D
2
2 North
NS: 0 EW: 0
7
A
6
5
3
1
0
2
3
10
4
1
2
0
4
5
K
2
3
3
0
8
9
Q
6
1
4
0
6
A
3
10
2
4
1
K
9
4
2
2
4
2
Q
J
5
7
2
4
3
5
3
A
2
0
4
4
7
4
6
K
3
5
4
9 tricks claimed
N/S +140
9

After 1  opening from East people selected 4(!) different bids: 1, double, 2 and even 1NT. I believe 1 is the theoretically correct, but I selected double, as a sane bid that gives better chances to get in the top spot. I was lucky here. Partner bid 2 over 1NT from RHO, and it was a comfortable contract to play. I took the trump lead in my hand, played trump to the table, and  to my honor. Another trump to the table, another  back. Correct guess in  gave me  9 tricks. Sometimes bridge is easy game. 95.2%. Why so much?

The answer looks obvious - people who choose correct 1 bid end up in 2 contract and there are only 8 tricks in hearts double dummy. In order to lose only one trick in trumps declarer need to play from the table twice.  is the only suit for transportation, so East robot would be able to jump the ace of trumps on the second round transfer to West’s hand and receive the spade ruff.

Funny, but scoresheet demonstrates that this explanation is wrong.  On each table where play started that way, robots rejected the idea to get the ruff: sometimes East volunterally played the third round of trumps, sometimes it correctly transferred into West hand, but West did not play  anyway.

So, why 95%? Many players did not try for 9 tricks simply playing trump from their hand; many others misguessed . 8 tricks in the 2 major contract gave 71.4% so it was still very good result.

Some people made both: played trump from the hand and misguessed . Down one was good for 40.5%.

Some other people overbid and got to less comfortable levels. Down 2 gave 16.7%, down 3 - 3.4%, down 4 was bottom.

***

Before turn the page please make sure there are no children behind your back

Board 3.

Robot
K85
K65
10
KJ10643
Robot
A763
QJ1032
982
5
Robot
J4
87
AK65
Q9872
Olegru
Q1092
A94
QJ743
A
W
N
E
S
1NT
2
2
P
2
P
P
P
D
3
2 South
NS: 0 EW: 0
10
2
K
3
2
0
1
A
4
4
9
2
0
2
6
7
5
8
0
0
3
3
5
Q
A
3
1
3
2
5
A
4
1
2
3
Q
8
4
K
0
2
4
K
3
9
9
3
3
4
A
6
2
7
3
4
4
Q
6
6
5
3
5
4
J
8
7
7
3
6
4
9
K
10
J
1
7
4
J
8
10
J
1
8
4
3
2
Q
10
1
9
4
N/S +140
13

I was happy with my result on previous board, so I forgot my resolution to play normal bridge and routinely open 1NT

I got lucky. Actually, I got double lucky. 

At first I found partner with very suitable hand and my crazy 1NT opening prevented opponents from competing in clubs. 

Second ... look at the play. Opponents started from two top diamonds and diamond ruff and played . I took transferred to the table by the Ace and made losing finesse in trumps.  Clearly stupid play, because now West could get me down by playing King of spades - spade to ruff, but instead it selected "save" club continuation to enable me ruff and sluff for 9 tricks and 90.5%.

What happened on other tables? Of course all reasonable people opened 1. Well, actually every single player except me opened 1 on that hand.

2 from the left; double from partner, 2 from the right. The system bid now would be 2 and majority of people choose it. The second choice was pass. Actually there were third and even fourth choice. The third choice selected by one (I believe) person was double. I can understand this choice, even if it contradicts the system. The fourth choice selected by also one person is harder to understand - he or she jumped to 3! Misclick, I guess. Person got lucky. But not as lucky as me. Played on that table started exactly the same, but this time West robot found K -  play for down two in the 3 contract. Still 81%.

Ok, lets return to sane people.

After 2 bid they saw 3 from the left 3 from partner and 4 from the right. Another decision time.

4 looks like sane bid and many people chose it. Alas, Partner corrected to 4, opponents double for down two - 27.4%. Players who chose double got the same result.

Pass seems timid, but it was the sane way to get a good result. Against 4 North lead Q. If South played Ace, declarer guessed spade correctly and fulfill 4 clubs, giving 61.9% to human; if South duck the  lead, declarer will misguess spades later, giving human 86.9%.

Finally, 3 players selected 4 bid after 4 clubs and hit the gold - in that case opponents decided to sacrifice in 5 clubs doubled giving 94+%.

Looks like that particular board was to encourage bad bridge, and I was one of the people who benefited from it.

Board 4.

Robot
J98
543
Q1094
A94
Robot
A763
Q96
2
Q6532
Robot
KQ1054
8
AJ76
J108
Olegru
2
AKJ1072
K853
K7
W
N
E
S
P
P
1
2
2
3
P
4
P
P
P
D
4
4 South
NS: 0 EW: 0
3
6
8
10
3
1
0
2
9
A
4
1
2
0
2
10
K
A
0
2
1
4
Q
8
7
1
3
1
3
J
A
9
3
4
1
2
5
9
7
1
5
1
Q
5
7
4
1
6
1
6
6
3
10
1
7
1
5
J
5
4
1
8
1
2
A
8
Q
2
8
2
K
J
8
3
3
9
2
K
9
6
10
3
10
2
K
J
7
Q
3
11
2
N/S +650
13

One of the most boring bords on my taste. The standard bidding and many easy roads to 11 tricks. Some players managed to make, 10, 9 and even 8 tricks, so 72%

Board 5

Robot
4
K532
853
86532
Robot
10983
Q6
Q10762
A9
Robot
AKQ76
1097
K
J1074
Olegru
J52
AJ84
AJ94
KQ
W
N
E
S
P
1
X
P
2
P
P
P
D
5
2 North
NS: 0 EW: 0
K
A
5
2
3
1
0
4
3
10
6
1
2
0
Q
7
9
8
1
3
0
Q
7
4
K
0
3
1
4
3
Q
5
2
3
2
K
2
2
8
2
3
3
A
J
2
9
2
3
4
7
J
3
10
3
4
4
9 tricks claimed
N/S +110
8

I did not want to bid 1NT without a single stopper in the opponents hand, so prefer double. After partner bid 2 diamonds I simply has no any bid available and had to pass. Easy 9 tricks and 47.6% in a big company. People who bid 1NT found 10xxx in partner's hand and strike a gold - 85.4%.

Board 6.

Robot
J1086
109842
AK104
Robot
94
QJ10
KJ653
J92
Robot
AQ5
K754
Q
87653
Olegru
K732
A98632
A7
Q
W
N
E
S
P
1
P
2
P
4
P
P
P
D
6
4 South
NS: 0 EW: 0
K
2
3
Q
0
0
1
A
9
6
2
3
1
1
A
2
3
Q
3
2
1
7
10
K
5
2
2
2
Q
K
8
4
3
3
2
2
10
9
5
0
3
3
4
5
7
8
3
4
3
3
6
Q
A
1
5
3
J
4
3
10
1
6
3
J
8
7
4
1
7
3
10
K
A
9
3
8
3
9
8
6
7
3
9
3
6
J
J
5
3
10
3
N/S +420
13

This is very interesting board.

Everybody opens 1, sees 2 from the partner and need to decide what to do next.

If South passes, West leads the top club and switches to spades. There is relatively easy to collect 10 tricks after that beginning 83% for  making. 

If South jumps to 4, West leads the top club and continues with top club. 10 tricks still available after it, but not very straightforward. I was one of two lucky declarers who managed to collect 10 tricks after it. I am actually curious if my line of play was technically correct or just lucky. 98.8% for it was pleasant reward.

Some South preferred to invite partner to game. No luck with it. After any invitation sequence West leads diamond or switches to diamonds after taking top club making game impossible. Down one gave 36.2%, down two - 22.5%, down 3 - 7.5%.

Board 7 

Robot
KJ
A976532
K73
2
Robot
A65
KJ10
104
J8654
Robot
10843
Q4
AJ98
Q107
Olegru
Q972
8
Q652
AK93
W
N
E
S
1
1
1NT
P
P
2
X
P
P
P
D
7
2X West
NS: 0 EW: 0
10
J
Q
K
0
0
1
2
K
4
8
1
1
1
4
A
2
3
2
1
2
Q
2
9
J
2
1
3
4
7
J
A
1
2
3
8
Q
K
2
3
3
3
A
5
6
7
0
3
4
A
10
3
5
0
3
5
6
5
8
6
0
3
6
K
6
10
9
0
3
7
7
4
9
3
2
3
8
8
9
7
5
0
3
9
3
J
10
Q
0
3
10
E/W +1070
13

The nightmare board. 

1 opening with 11 points I consider to be kosher. CHO bid 1NT over 1 intervention from West and double after it repeated hearts. Penalty double, isn't it? I guess I should not let robot to make such an expensive decision and run to 3, but I was stupid.

There was a way to limit 2 doubled to plus only one, but I gave up to early. Funny, but -870 for 2  doubled 9 tricks would be not very bad score - 28.8%.

Even -1270 gave me some matchpoints - 18.8%, I was not the only victim.  

Board 8

Robot
Q107
Q95
K753
1097
Robot
K954
874
AJ62
J8
Robot
A863
J106
984
KQ3
Olegru
J2
AK32
Q10
A6542
W
N
E
S
P
P
P
1NT
P
2
P
2
P
2
P
2NT
P
P
P
D
8
2NT South
NS: 0 EW: 0
10
J
Q
A
3
1
0
2
9
8
3
0
1
1
7
4
K
4
2
1
2
J
A
5
7
3
2
2
Q
K
A
4
1
3
2
2
9
10
3
3
4
2
6
7
4
6
3
5
2
5
5
8
8
3
6
2
J
Q
K
A
2
6
3
10
K
Q
6
3
7
3
2
10
5
3
0
7
4
9
J
6
2
0
7
5
7
9
8
3
1
8
5
N/S +120
13

I am not so sure what could I write about that board. Majority of normal people opened 1 and end up in 1NT. Few maniacs, like me, opened 1NT with 14 points and had to play 2NT. Still normal contract. Taking 8 tricks was not difficult and gave 64.1%

Some people found a way to confuse robots and took 9 tricks for 91%. 

Board 9

Robot
J73
975
Q76
J1095
Robot
AKQ5
KQ6
1098
762
Robot
1096
1043
K42
KQ43
Olegru
842
AJ82
AJ53
A8
W
N
E
S
1
P
1
P
1
P
3NT
P
P
P
D
9
3NT South
NS: 0 EW: 0
J
2
4
8
0
0
1
6
8
K
A
3
1
1
3
Q
9
4
0
1
2
7
10
2
5
1
2
2
11 tricks claimed
N/S +460
4

Partner opened 1 and I bid my 4 card major, skipping 4 card 

On that board it appears to be not the best idea. After this start West lead against 3NT. By some reasons it decided to switch on  on the second round, giving easy 11 tricks and 68%

Against disciplined players who bid they suits in order, Gib lead , giving them 12 tricks and 97.4%

Board 10

Robot
J1093
KJ8754
Q42
Robot
K8764
84
A3
10875
Robot
AQ105
A752
1092
K9
Olegru
J932
KQ6
Q6
AJ63
W
N
E
S
1
X
1
1
2
2
P
P
P
D
10
2 North
NS: 0 EW: 0
10
Q
K
A
1
1
0
4
5
Q
3
3
2
0
2
4
K
A
2
2
1
2
6
J
3
0
2
2
J
8
A
6
2
2
3
Q
3
8
4
2
2
4
7
K
10
5
3
3
4
A
2
7
9
3
4
4
3
4
10
K
2
4
5
5
9
7
6
3
5
5
J
5
7
10
3
6
5
6
Q
8
2
0
6
6
9
8
9
J
1
7
6
N/S -100
13

I doubled 1 on the first round and competed 2 after partner bid 1 and RHO tried 2. Currently I doubt smartness of my decisions, but majority players did exactly the same. Down one was the best I could do and I was rewarded by 71%. Down two would give only about 18%.

Looking at the bidding now, I believe it would be wiser to pass over 2 from opponents at let partner to make a decision. Only two players did it in the actual board. Partner competed 2 and opponents took a push to 3. One player set it for very good score, second let it make for not so good score.

The choice of minority on the first round was pass. Half of the first round passers passed on the second round two and let opponents to play 2. CHO punished them for cowardness by leading the Ace of diamond.    

The way to get 90+% human should pass on the first round, and double for takeout after opponents will stop in 2. Partner will bid 2 and opponents will get overexcited and voluntarily bid to 4. Partner will not lead the Ace of diamonds after that bidding and 4 will go down at least one.

Board 11

Robot
K753
73
108
AQJ106
Robot
86
A1094
AQ52
K75
Robot
J94
Q52
764
9842
Olegru
AQ102
KJ86
KJ93
3
W
N
E
S
1NT
P
2
P
2
P
4
P
P
P
D
11
4 South
NS: 0 EW: 0
10
2
4
J
3
1
0
6
3
A
2
1
2
0
4
5
J
7
3
3
0
K
6
9
Q
3
4
0
3
8
Q
7
1
5
0
6
4
Q
K
0
5
1
7
8
J
A
3
6
1
3
A
5
4
0
6
2
Q
K
8
2
1
7
2
11 tricks claimed
N/S +450
9

Another “ not family friendly” 1NT opening with 14 points and small Singleton. Did not matter that time. I played the same 4 contract all normal people reached after 1 opening. The crux of the matter was the trump finesse. I was lucky and got 85.5%. People who guessed wrong got 35.5% for 10 tricks.

Board 12

Robot
964
QJ
KJ10762
Q5
Robot
Q10
AK1097
Q3
9863
Robot
AJ873
543
984
J2
Olegru
K52
862
A5
AK1074
W
N
E
S
2
P
3
X
P
4
P
P
P
D
12
4 North
NS: 0 EW: 0
4
5
K
3
0
0
1
4
10
A
2
2
0
2
7
5
9
Q
1
1
2
A
3
2
Q
1
2
2
K
5
6
J
1
3
2
3
2
K
5
3
4
2
8
2
10
4
1
5
2
6
J
A
Q
3
6
2
11 tricks claimed
N/S +650
8

Robots preempt and humans divided on two approximately equal groups: passers and doubters. This time aggression was rewarded by vulnerable game. I made first round diamond finesse, that was stupid. Only 11tricks, but still 75%. Smart people put the Ace on the first round and later discarded losing diamond on clubs for 12 tricks and 92.1%

I wasted an impressive number of matchpoints, but was very lucky and got almost 72%. 

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