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Is this position legal?


  • 7 months ago · Quote · #1241

    Ghostqiuyu

    1)     6 moves

  • 7 months ago · Quote · #1242

    VishButNotAnand

  • 7 months ago · Quote · #1243

    Remellion

    #1251

    Sorry, I've been a little tired for retros the past week. Now I get to look at this...

    11+14. Poking around the position a while, we find the bottom right cage is really tough to unlock. Various tries fail:

    (try) -1...Nf4 -2. g3? and white is in retropat next.
    (try) -1...Nf4 -2. gx~h3? and black's king can't go home.

    (key) -1...Nf4 -2. fx(B/R)g4! gxNh1=R! -3. Ng3.

    Now here was a little trick. It looks completely illegal thanks to the colour effect (white Bf1 vs c7xd6xe5xf4xg3) until I recalled using the same trick in an elementary composition. The d4-pawn came from c7, and the colour effect is broken and legality becomes obvious.

    One last finesse: the d4-pawn took white's light bishop, since trying to retract a light capture by the g2-pawn locks out either black's R or B that was taken on f3, since white's dark bishop would then have to been captured by the d4-pawn (colour effect!) and white's light B + 2R must return home before uncapping gxf3.

    Therefore 14 pawn moves were made in total.

  • 7 months ago · Quote · #1244

    Chessgrandmaster2001

    *bump*

  • 7 months ago · Quote · #1245

    shoopi

    Good job on the solving Remellion.

    Stating the obvious, I have been inactive in these forums unfortunately as I have began working in a full time job as well as started studying computers. If I have the extra time I might compose some easier yet fun retro puzzles...

  • 3 months ago · Quote · #1246

    Guerau

    Hi everyone!

  • 2 months ago · Quote · #1247

    matthew_b_rook

    AceOfGames wrote:
    wasted_youth wrote:
     

    we have a genius over here

    what post number?

  • 2 months ago · Quote · #1248

    Convolvulus

    Waar's ek nou?!??

  • 8 weeks ago · Quote · #1249

    Justified08

  • 8 weeks ago · Quote · #1250

    Frankwho

    Kingside, no. Queenside, yes.



  • 8 weeks ago · Quote · #1251

    chaotic_iak

    I find no problem letting kingside castling possible.



  • 8 weeks ago · Quote · #1252

    luk358

    The number 1 no. 2, 3 and 4 yes.

  • 8 weeks ago · Quote · #1253

    Frankwho

    *facepalm*

    Forgot that black is missing a knight as well! Ugh.

  • 8 weeks ago · Quote · #1254

    Chessgrandmaster2001

    Nope...

  • 8 weeks ago · Quote · #1255

    VishButNotAnand

    Yes, he can castle queenside

  • 5 weeks ago · Quote · #1256

    prashanth222000

    Justified08 wrote:
     



  • 5 weeks ago · Quote · #1257

    TacticalAttack1

    2 is legal

  • 7 days ago · Quote · #1258

    chesssmart82

  • 7 days ago · Quote · #1259

    jhreb

    chesssmart82 wrote:
     

    2 dark squared bishops for white, but he has all his pawns. So no.

  • 7 days ago · Quote · #1260

    Irontiger

    Bf2 -> Bg2 makes it slightly less boring.

    c4 -> c6 + removing the Bc5 makes it almost a real problem.


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