MESON Chess Problem Database

Problem Display
PID: 117142 (4K2N/2p1p3/1p2kpR1/1N1nn3/1p2P3/8/3q4/1BrbR2Q w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

64 Shakhmatnoe obozrenie, 1935

4K2N/2p1p3/1p2kpR1/1N1nn3/1p2P3/8/3q4/1BrbR2Q

#2

8 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe1
      • 2.exd5#
    • 1...Qc3
      • 2.exd5#
    • 1...Qe3
      • 2.exd5#
    • 1...Qf4
      • 2.exd5#
    • 1...Qg5
      • 2.exd5#
    • 1...Qh6
      • 2.exd5#
    • 1...Qb2
      • 2.exd5#
    • 1...Qe2
      • 2.exd5#
    • 1...Qf2
      • 2.exd5#
    • 1...Qh2
      • 2.exd5#
    • 1...Sc4
      • 2.exd5#
    • 1...Sg4
      • 2.exd5#
    • 1...Sc6
      • 2.exd5#
    • 1...Sxg6
      • 2.exd5#
    • 1...Sd7
      • 2.exd5#
    • 1...Sf7
      • 2.exd5#
  • Keys
    • 1.Sf7!
      • threat
        • 2.Sd8#
      • 1...Sxg6
        • 2.exd5#
      • 1...Sxf7
        • 2.exd5#
      • 1...Sc3
        • 2.Sxc7#
      • 1...Se3
        • 2.Sg5#
      • 1...Sf4
        • 2.Sg5#
      • 1...Sd3
        • 2.Sd4#
      • 1...Sf3
        • 2.Qh3#
      • 1...Sc4
        • 2.exd5#
      • 1...Sg4
        • 2.exd5#
      • 1...Sc6
        • 2.exd5#
      • 1...Sd7
        • 2.exd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 10
  • Sets
    • Q(c);N_GUARD,XR(B)::P(D),XS(e)
    • Q(c);N_GUARD::P(D),XS(e)
    • S(f);::R(B)+P(D)DCHECK,XS(e)
    • S(f);N_SPINP(i),XR(F)::R(B)+P(D)DCHECK,XS(e)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • S(f);N_SPINP(i),XR(F)::R(B)+P(D)DCHECK,XS(e)
      • S(f);XS(H)::R(B)+P(D)DCHECK,XS(e)
      • S(e);N_GUARD,S_CUTR(a)::S(E),XP(j)
      • S(e);S_CUTQ(c)::S(H)
      • S(f);S_CUTQ(c)::S(E)
      • S(f);N_GUARD,S_CUTB(b)::QAB(C)
      • S(f);::R(B)+P(D)DCHECK,XS(e)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).