The odd opening position

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Crazychessplaya

Standard opening variations of well-known openings are shown below. Can you name both the opening and the variation? All positions except one share a common characteristic. Can you spot the odd position out? Hint: the common characteristic is mathematical in its nature.

[Congratulations to Rooperi and Checkmateisnear for solving the main question; all positions except VII show the board after white's 10th move. VII shows the board after white's 14th move.

All positions are now solved:

I.King's Indian:Saemisch; II.King's Gambit:Muzio Gambit; III.Sicilian:Pelikan/Shveshnikov;IV.Ruy Lopez:Schliemann; V.Dutch:Leningrad;VI.Benoni:Taimanov;VII.French:Winawer;VIII.Queen's Gambit Declined: Lasker;IX.Sicilian:O'Kelly;X.Ruy Lopez:Cozio;XI.King's Gambit: Allgaier;XII.Vienna: Frankenstein-Dracula]

rooperi

XII is the Vienna: Frankenstein-Dracula

rooperi

III is the Sicilian: Pelikan

Crazychessplaya
rooperi wrote:

XII is the Vienna: Frankenstein-Dracula


 I knew you'd get this one!

Crazychessplaya
rooperi wrote:

III is the Sicilian: Pelikan


 Yes!

zankfrappa

Wow!  I thought with the full boards instead of sections I would do better at
this puzzle but I guess not as this is difficult as well.

krish40

ii is the kings gambit

rooperi

II is a KG, maybe Muzio gambit?

mkchan2951

VII is french winawer right? and IX is sicilian maroczy bind

Crazychessplaya
krish40 wrote:

ii is the kings gambit


 Correct, and Rooperi identifies it correctly as Muzio.

Crazychessplaya
manikcharan wrote:

VII is french winawer right? and IX is sicilian maroczy bind


 Winawer is correct, but for IX even though it shows a Maroczy bind structure, I am looking for a specific variation...

mkchan2951

II is actually the KG wild muzio

Golbat

I. King's Indian: Exchange Variation

II. King's Gambit: Double Muzio

III. Sicilian: Pelikan Variation

IV. (Some 1. e4 line)

V. (Some Dutch line)

VI. King's Indian: Four Pawns Attack

VII. French Defense: Winawer Poisoned Pawn

VIII. Queen's Gambit Declined: Lasker Variation

IX. (Some English line)

X. I would guess Scotch: Four Knights?

XI. (Some King's Gambit line)

XII. Vienna: Frankenstein-Dracula Variation

Crazychessplaya

BlackWaive correctly adds QGD Lasker to the solved pool...

mkchan2951

hey IX can even be the pelikan sicilian

Golbat

Oh, maybe VI was supposed to be Benoni: Four Pawns Attack.

Crazychessplaya
BlackWaive wrote:

Oh, maybe VI was supposed to be Benoni: Four Pawns Attack.


 Verrry close...

mkchan2951

i got it schmidt variation benoni VI

Crazychessplaya
manikcharan wrote:

i got it schmidt variation benoni VI


 It is Benoni, but neither Schmidt nor Four Pawns...

rooperi
manikcharan wrote:

i got it schmidt variation benoni VI


I was thinking that, but Black needs an e5 pawn?

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