MESON Chess Problem Database

Problem Display
PID: 215700 (5Q1b/B7/rn2P1N1/2NpR3/3k2n1/pK5b/4p3/8 w - - 0 1)

Jensen, Wilhelm Emil

3rd Prize, Brighton Guardian, 1882

5Q1b/B7/rn2P1N1/2NpR3/3k2n1/pK5b/4p3/8

#2

7 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Qxf2#
    • 1...Sh2
      • 2.Qf2#
    • 1...Sxe5
      • 2.Qf2#
    • 1...Sh6
      • 2.Qf2#
    • 1...Sa4
      • 2.Qf4#
    • 1...Sc4
      • 2.Qf4#
    • 1...Sd7
      • 2.Qf4#
    • 1...Sa8
      • 2.Qf4#
    • 1...Sc8
      • 2.Qf4#
  • Tries
    • 1.Qf2+?
      • 1...Se3
        • 2.Qxe3#
      • 1...Sxf2!
  • Keys
    • 1.Se7!
      • threat
        • 2.Sc6#
      • 1...Kxc5
        • 2.Rxd5#
      • 1...Kxe5
        • 2.Sc6#
      • 1...Bxe5
        • 2.Sf5#
      • 1...Sxe5
        • 2.Qf2#
      • 1...Sa4
        • 2.Qf4#
      • 1...Sc4
        • 2.Qf4#
      • 1...Sd7
        • 2.Qf4#
      • 1...Sa8
        • 2.Qf4#
      • 1...Sc8
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(e);N_GUARD::QAB(G),XS(e)
    • S(e);N_GUARD::QAB(G)
    • S(e);N_GUARD,XR(C)::QAB(G)
    • S(h);::QAR2(G)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB1(G),XS(e)
      • Refutation
        • S(e);XQ(G)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(d);P_SPINP(f),P_SPINS(h),S_FLIGHT,XS(B)::R1(C),XP(f)
      • K(d);S_FLIGHT,XR(C)::S(E)
      • B(i);SBLOCK,XR(C)::S(E)
      • S(e);N_GUARD,SBLOCK,XR(C)::QAB(G)
      • S(h);::QAR2(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).