MESON Chess Problem Database

Problem Display
PID: 203556 (3n4/1Q1P2K1/3nk1N1/8/6P1/6N1/8/3R4 w - - 0 1)

Hertmann, Sandor

Nepszava, 1924

3n4/1Q1P2K1/3nk1N1/8/6P1/6N1/8/3R4

#2

7 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Qd5#
    • 1...Se4
      • 2.Qxe4#
      • 2.Qd5#
      • 2.Qb3#
    • 1...Sb5
      • 2.Qe4#
      • 2.Qd5#
    • 1...Sf5+
      • 2.gxf5#
    • 1...S6f7
      • 2.Qd5#
      • 2.Qb3#
    • 1...Sc8
      • 2.Qe4#
      • 2.Qd5#
      • 2.Qb3#
      • 2.dxc8Q#
      • 2.dxc8B#
    • 1...Se8+
      • 2.dxe8Q#
      • 2.dxe8R#
  • Tries
    • 1.Qb3+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Kxd7!
  • Keys
    • 1.Qc8!
      • 1...Sf5+
        • 2.gxf5#
      • 1...Se8+
        • 2.dxe8Q#
        • 2.dxe8S#
        • 2.dxe8B#
        • 2.dxe8R#
      • 1...Sxc8
        • 2.dxc8Q#
        • 2.dxc8B#
      • 1...Sc6
        • 2.d8S#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Se4
        • 2.Qc4#
      • 1...Sb5
        • 2.Qc4#
      • 1...S6b7
        • 2.Qc4#
      • 1...S6f7
        • 2.Qc4#
      • 1...S8b7
        • 2.d8S#
      • 1...S8f7
        • 2.d8S#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(a);::QAB1(E)
    • S(a);CHECK,OGATE::P(C),XS(a)
    • S(a);CHECK,OGATE::PXS(a)=Q
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB(E),XS(a)
      • Refutation
        • K(b);P_SPINS(a),S_FLIGHT,XP(F)
  • Actual
    • Q(E);
    • Vars
      • S(a);CHECK,OGATE::P(C),XS(a)
      • S(a);OGATE,XQ(E)::PXS(a)=Q
      • S(c);OGATE::P=S
      • S(a);N_GUARD::QAB(E),XS(a)
      • S(a);N_GUARD::QAB(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).