MESON Chess Problem Database

Problem Display
PID: 257229 (n7/1p6/Nn6/k2pP3/1R1N4/p7/p1Q1P3/K7 w - - 0 1)

Kauders, Dr Albert

Wiener Schachzeitung, 1899

n7/1p6/Nn6/k2pP3/1R1N4/p7/p1Q1P3/K7

#2

7 + 7

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sa4
      • 2.Qxa4#
    • 1...Sc4
      • 2.Qa4#
    • 1...Sd7
      • 2.Qa4#
    • 1...Sc8
      • 2.Qa4#
    • 1...bxa6
      • 2.Sc6#
      • 2.Qc5#
  • Tries
    • 1.Qd3?
      • threat
        • 2.Sb3#
        • 2.Qb5#
      • 1...bxa6
        • 2.Sc6#
      • 1...Sc7
        • 2.Sb3#
      • 1...Sc4!
    • 1.Qc6?
      • threat
        • 2.Qb5#
      • 1...Kxa6
        • 2.Ra4#
      • 1...bxa6
        • 2.Qc5#
      • 1...Sc7
        • 2.Qxb6#
      • 1...bxc6!
  • Keys
    • 1.Qg6!
      • 1...Kxa6
        • 2.Ra4#
      • 1...bxa6
        • 2.Sc6#
      • 1...Sc7
        • 2.Qxb6#
      • 1...Sa4
        • 2.Sb3#
        • 2.Rb5#
      • 1...Sc4
        • 2.Sb3#
      • 1...Sd7
        • 2.Sb3#
      • 1...Sc8
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(e);N_GUARD::QAR1(B),XS(e)
    • S(e);N_GUARD::QAR1(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);N_GUARD,XS(G)::S(E)
        • S(g);::S(E)
      • Refutation
        • S(e);
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • K(c);P-FLIGHT,P_SPINS(e),XS(G)::R(D)
        • P(f);SBLOCK,XS(G)::QAR2(B)
        • S(g);N_GUARD::QAB1(B),XS(e)
      • Refutation
        • P(f);XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(c);N_GUARD,P-FLIGHT,P_SPINS(e),XS(G)::R(D)
      • P(f);N_GUARD,SBLOCK,XS(G)::S(E)
      • S(g);N_GUARD::QAB1(B),XS(e)
      • S(e);::S(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).