MESON Chess Problem Database

Problem Display
PID: 203580 (6n1/5p2/3n3R/2p1kB2/Q3PR2/2P3K1/8/8 w - - 0 1)

Papp, Jeno

Uj Nemezdek, 1924

6n1/5p2/3n3R/2p1kB2/Q3PR2/2P3K1/8/8

#2

7 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe4+
      • 2.Qxe4#
    • 1...Sxf5+
      • 2.Rxf5#
  • Tries
    • 1.Qe8+?
      • 1...Se7
        • 2.Qxe7#
      • 1...Sxe8!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qxd6#
      • 1...Sxe4+
        • 2.Rxe4#
      • 1...Sxf5+
        • 2.Qxf5#
      • 1...Sxh6
        • 2.Qe7#
      • 1...Sc4
        • 2.Qd5#
      • 1...Sb5
        • 2.Qd5#
      • 1...Sb7
        • 2.Qd5#
      • 1...Sc8
        • 2.Qd5#
      • 1...Se8
        • 2.Qd5#
      • 1...Sf6
        • 2.Qe7#
      • 1...f6
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • S(c);CHECK,OGATE,XP(D)::QAR1(C),XS(c)
    • S(c);CHECK,OGATE,XB(F)::R1(E),XS(c)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAR2(C),XS(e)
      • Refutation
        • S(c);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C),XS(c)
    • Vars
      • S(c);CHECK,OGATE,XP(D)::R1(E),XS(c)
      • S(c);CHECK,OGATE,XB(F)::QAR1(C),XS(c)
      • S(e);N_GUARD,XR(G)::QAR2(C)
      • S(c);OGATE::QAR1(C)
      • S(e);N_GUARD::QAR2(C)
      • P(d);N_GUARD::QAR1(C)
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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).