MESON Chess Problem Database

Problem Display
PID: 261523 (BnQ5/2p5/2N4r/1RNk3r/4pp1p/2K5/8/8 w - - 0 1)

Junker, Karl

Neue Zurcher Zeitung, 1962

BnQ5/2p5/2N4r/1RNk3r/4pp1p/2K5/8/8

#2

6 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Sxe4#
    • 1...Rxc6
      • 2.Qe6#
    • 1...Rd6
      • 2.Sb3#
      • 2.Sd3#
      • 2.Sa4#
      • 2.Sa6#
      • 2.Se6#
    • 1...Re6
      • 2.Qxe6#
    • 1...Rh7
      • 2.Qe6#
    • 1...Rh8
      • 2.Qe6#
    • 1...Sxc6
      • 2.Sb7#
  • Tries
    • 1.Qf5+?
      • 1...Kd6
        • 2.Sxe4#
      • 1...Rxf5!
    • 1.Qd7+?
      • 1...Rd6
        • 2.Sb3#
        • 2.Sd3#
        • 2.Sa4#
        • 2.Sa6#
        • 2.Se6#
        • 2.Sb7#
      • 1...Sxd7!
    • 1.Qg8+?
      • 1...Re6
        • 2.Qxe6#
      • 1...Kd6!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qd1#
      • 1...Kd6
        • 2.Sxe4#
      • 1...Rxc6
        • 2.Qe6#
      • 1...Sxc6
        • 2.Sb7#
      • 1...f3
        • 2.Sxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • K(d);N_GUARD,P-FLIGHT::S(C),XP(a)
    • R(f);N_GUARD,P_PINS(C),P_SPINR(f),XS(D)::QAB1(F)
    • R(f);N_GUARD::QAB1(F),XR(f)
    • R(f);N_GUARD::QAB1(F)
    • S(h);P_SPINS(h),SBLOCK,XS(D)::R(B)+S(C)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(d);P-FLIGHT::S(C),XP(a)
      • Refutation
        • R(e);XQ(F)
    • Try
      • Q(F);CHECK
      • Refutation
        • S(h);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAB1(F),XR(f)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(F);
    • Threat
      • QAR(F)
    • Vars
      • K(d);N_GUARD,P-FLIGHT::S(C),XP(a)
      • R(f);N_GUARD,P_PINS(C),P_SPINR(f),XS(D)::QAB1(F)
      • S(h);P_SPINS(h),SBLOCK,XS(D)::R(B)+S(C)
      • P(b);::R(B)+S(C),XP(a)
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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).