MESON Chess Problem Database

Problem Display
PID: 244458 (1B4b1/2Np4/K7/pQ2nn2/Rb2k1P1/3R3N/4P3/q4r2 w - - 0 1)

Eerkes, Allard Pieter

Tijdschrift vd KNSB, 1940

1B4b1/2Np4/K7/pQ2nn2/Rb2k1P1/3R3N/4P3/q4r2

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Sg5#
    • 1...Bd5
      • 2.Qxd5#
    • 1...Bh7
      • 2.Qd5#
    • 1...Sf3
      • 2.Qxf5#
    • 1...Sf7
      • 2.Qd5#
  • Keys
    • 1.Se8!
      • threat
        • 2.Sf6#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...Sxg4
        • 2.Sg5#
      • 1...Sf3
        • 2.Qxf5#
      • 1...Sc4
        • 2.Sg5#
      • 1...Sc6
        • 2.Sg5#
      • 1...Sg6
        • 2.Sg5#
      • 1...Sf7
        • 2.Qd5#
      • 1...Se3
        • 2.Sd6#
      • 1...Sg3
        • 2.Sd6#
      • 1...Sd4
        • 2.Qxe5#
      • 1...Sh4
        • 2.Sd6#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Sh6
        • 2.Sd6#
      • 1...Se7
        • 2.Sd6#
      • 1...Sg7
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 3
  • Sets
    • R(b);SBLOCK::S(C)
    • B(i);N_GUARD::QAB1(F),XB(i)
    • B(i);N_GUARD::QAB1(F)
    • S(f);OGATE::QAB1(F),XS(g)
    • S(f);S_CUTB(i)::QAB1(F)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • S(f);OGATE,XR(B)::QAB1(F),XS(f)
      • S(f);XP(E)::S(C)
      • S(f);OGATE::QAB1(F),XS(g)
      • S(f);N_SPINB(c)::S(C)
      • S(f);::S(C)
      • S(f);S_CUTB(i)::QAB1(F)
      • S(g);N_GUARD::S(H)
      • S(g);N_SPINB(c),S_CUTQ(a)::QAR1(F),XS(f)
      • S(g);N_GUARD::S(H),XS(g)
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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).