MESON Chess Problem Database

Problem Display
PID: 169946 (b2R1R2/2p1B1pq/8/K1Nnkn2/1p2N2p/1P2p2B/8/7Q w - - 0 1)

Pedersen, Eigil Palle

1st Prize, Fyns Socialdemokrat, 1945

b2R1R2/2p1B1pq/8/K1Nnkn2/1p2N2p/1P2p2B/8/7Q

#2

9 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qa1#
    • 1...Kf4
      • 2.Sd3#
    • 1...Sd4
      • 2.Sd3#
      • 2.Sd7#
  • Tries
    • 1.Rxf5+?
      • 1...Kd4
        • 2.Qa1#
        • 2.Qd1#
      • 1...Qxf5!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Qe4#
      • 1...Kd4
        • 2.Qa1#
      • 1...Kf4
        • 2.Qh2#
      • 1...Sdxe7
        • 2.Sd3#
      • 1...Sfxe7
        • 2.Sf3#
      • 1...Sc3
        • 2.Sd3#
      • 1...Sf4
        • 2.Sf7#
      • 1...Sb6
        • 2.Sd3#
      • 1...Sf6
        • 2.Sd3#
      • 1...Sg3
        • 2.Sf3#
      • 1...Sd4
        • 2.Sd7#
      • 1...Sd6
        • 2.Sf3#
      • 1...Sh6
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • K(e);P_SPINS(d),S_FLIGHT::QAB(A)
    • K(e);P_SPINS(f),S_FLIGHT::S(F)
  • Tries
    • Try
      • R(I);CHECK,XS(f)
      • Refutation
        • Q(i);XR(I)
  • Actual
    • S(D);
    • Threat
      • QAR1(A)
    • Vars
      • K(e);P_SPINS(d),S_FLIGHT::QAB(A)
      • K(e);P_SPINS(f),S_FLIGHT::QAB(A)
      • S(d);XB(G)::S(F)
      • S(f);XB(G)::S(D)
      • S(d);::S(F)
      • S(d);SBLOCK::S(D)
      • S(f);::S(D)
      • S(f);SBLOCK::S(F)
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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).