Strength Analysis Forum Game - Series 1

[ratata]

1. 2d
2. 3k
3. 9d
4. 10k
5. 4k

[tj86430]

1. 2k
2. 7k
3. 5k
4. 10k
5. 9k

1. Some moves seem strange to me, but no really big blunders. A couple of nice tesujis. Intense fighting leading to resignation. Probably not dan, but might be fairly close.

2. Like watching myself play. I even had to check that it wasn't in fact my game!

3. Strange game. In the opening there are a lot of sequences I find not so skillful, OTOH some plays are quite nice. White seems to resign quite soon (I would have at least tried to kill B A15 group). Black seems stronger than white, but since they must be of same strength I'll judge by black's play and assume white had a bad day.

4. A lot of bad moves, but still overall somewhat solid. Weaker than me, but not significantly

5. Again mixed feelings. Somewhat competent, but still moves that seem like big mistakes. No clear sense of direction or urgency. Black was clearly winning but still white didn't resign.

[Kirby]

I am terrible at this game, but here are my guesses:
Game 1: 3d
Game 2: 4k
Game 3: 9d
Game 4: 2d
Game 5: 1d

[unkx80]

Here are my wild guesses. I've never been accurate in such things.

1. 9d
2. 3k
3. 6d
4. 4d
5. 5k

Game 1: The early moves have a strong pro feel. But black must have overlooked W62.

Game 2: B13, B19, and B21 are very kyuish. Also, B15 should not tenuki. White seems a bit stronger than black, but his reading isn't so great either.

Game 3: This game is difficult to assess. Given the first 22 moves, looks like at least a mid-dan game. Is W28 an experiment? Black shows excellent reading skills in the remainder of the game.

Game 4: W28 is interesting, probably not a move easily found by kyu players. What is B47? But black's invasion at the bottom is skilful.

Game 5: Moves like B9 and W20 are very kyuish. Somehow, I thought white seems a bit stronger, but black won by such a large margin.

[Dusk Eagle]

I admit the slack deadline made me put this off for a little bit.

9d. The upper-right joseki seems to be played exclusively by the strongest players. Also, it just had a whole 9d feel to it, with white being sure of his ability to kill the top black group throughout the game.
11k. This was a weak game.
1k. I know I've played a few disaster games like this.
6k. Plenty of easy-to-spot mistakes.
8k. Plenty of easy (for me) misreads and just plain dumb shapes.

I did pretty well last time... let's see if these predictions are accurate. It's hard to guess the strength of games several stones weaker than yourself, other than saying "SDK" or "DDK". Then again, it's also hard to judge the strength of games several stones stronger than oneself. However, I am confident that the only game stronger than me is played between two 8ds or 9d/pros *sets self up for egg in face*.

[crux]

1. 5d
2. 5k
3. 9d
4. 2k
5. 4k

In game 1, Black's play seems to go a little funny around move 33; up to that point I was willing to believe it was a pro game.
Game 2, the move 13/15 combination seems to put a lowish upper limit on the strength.
Game 3, the initial sequence with the probe is something you typically see from high-level players. Move 28 looks funny to me, but not enough so I'd definitely call it bad. White seems to have tried to win the capturing race by creating a big eye which takes some reading ability, but misreads do happen at every level. Not sure about this game.
Game 4, move 45/47 looks odd. Other than that, some signs of thought.
Game 5, move 9 looks bad; move 43 seems a bit overconcentrated and surrounds an open skirt; the sequence at 224 shows some reading problems.

[Stable]

OK, here's my guesses:

1. 9d
2. 5k
3. 9d
4. 4d
5. 3k

Now I'll go see what the rest of you put...

[fwiffo]

1. 7d
2. 2k
3. 1d
4. 4d
5. 5k

[kokomi]

7k
3D
7D
1D
4k


The third one looks really like pro game, but i don't think pro will mess up the game so early

[kokomi]

I read through other people's comments, and many think the

first one pro. Isn't O14 bad?

and someone put them

all as kyus

I also think now

Araban's example in the first post

may be the correct answer

[Zwergesel]

I looked at other people's guesses, then looked at the games again ...
... I feel stupid now

[hiyayang]

1. 1d
2. 10k
3. 7d
4. 5k
5. 3k

1. looks like a bad shape. Pros would probably make the solid connection at P14 instead. But fixed it for black. R18 might have been better. seems wrong -- why would black strengthen the stronger right side at the expense of the weaker left side? should have switched places with . looks a bit odd too. F15 or even E13 seems the shape here. And black's misreading the sequence starting with is unimpressive. White's handling of the lower-left corner seems somewhat timid (e.g., why not at D3?) OTOH, both players demonstrated some skill with moves like and . Finally, I don't think a pro or high dan player would have played the last few moves like black did before resigning.

2. It looks like neither player saw anything wrong with the lower-right corner after .

3. Up to this could have been a pro game. However, white needed a move at C17 or B13 to defend the corner. White might have misread the corner or the capturing race (overlooking the combination?), which is somewhat uncharacteristic of a pro. But white's resigning without playing out the sequence seems to suggest he is at least a high dan.

4. is wrong. could have taken advantage of the mistake of by continuing pushing on the 4th line. Black #159 at P7 would have captured at least the two white stones; or better yet, O6 would have ensured the capture of the three white stones and the escape of the four black stones.

[tj86430]

Now that the deadline for answers has passed, I can post the first statistics.

The averages of answers were:

1: 4d (3.89)
2: 4k (4.26)
3: 3d (3.16)
4: 1k (0.95)
5: 5k (4.53)

(The closest to the average answers was blue, who would get 42 points if the average answers were the correct ones)

The standard deviations of answers were:

1: 4.25
2: 4.20
3: 5.03
4: 4.66
5: 4.68

I have agreed with Araban that he will send the right answers to me later this evening (US time), after which I will calculate the points and publish them with some statistics & graphs

[tj86430]

As promised, Araban sent me the answers and I calculated the scores.

The right answers are:

1. 7d (artem vs. zchen)
2. 5k (fwiffo vs. Dogen)
3. 9d (kobra vs. yatasty)
4. 1d (Naso vs. mutare)
5. 1k (spirito vs. topazg)

And the scores (I haven't checked them thoroughly yet, so if you spot any errors, let me know):

Kirby 43 (6+9+10+9+9)
crux 43 (8+10+10+8+7)
Stable 43 (8+10+10+7+8)
Harleqin 39 (5+9+7+9+9)
unkx80 36 (8+8+7+7+6)
Magicwand 32 (8+10+6+8+0)
illuck 32 (7+8+0+10+7)
fwiffo 32 (10+7+2+7+6)
blue 31 (8+7+2+8+6)
ratata 30 (5+8+10+0+7)
hiyayang 30 (4+5+8+5+8)
daniel_the_smith 29 (8+6+3+3+9)
kokomi 28 (0+3+8+10+7)
Zwergesel 25 (4+10+5+4+2)
sparvel 22 (1+7+2+8+4)
phrax 21 (8+4+0+9+0)
Dusk Eagle 20 (8+4+1+4+3)
Marcus 13 (6+0+0+6+1)
tj86430 12 (2+8+0+0+2)

(please note that fwiffo did't recognize his own game )

I will post some statistics later today.

[fwiffo]

Actually, I thought it looked familiar. But I thought it looked like a mash-up of some different situations I've seen in different games of mine. I also remember having LOST that game, so I may have been replaying it my head from Dogen's point of view. I remember in the original godiscussions.com review of the game saying something like "move X is where I think I lost the game" already having forgotten that I won by 0.5 points.

Anyhow, I deserve a penalty for having such an inflated opinion of my own play.