MESON Chess Problem Database

Problem Display
PID: 140928 (4krq1/5Nn1/5P2/3Q3p/5K2/8/6B1/8 w - - 0 1)

von Sponer, Gyorgy Janos Andor

Deutsches Wochenschach, 1915

4krq1/5Nn1/5P2/3Q3p/5K2/8/6B1/8

#2

5 + 5

6490 yacpdb 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Se6+
      • 2.Qxe6#
  • Tries
    • 1.Bh3?
      • threat
        • 2.Bd7#
        • 2.Qd7#
      • 1...Se6+
        • 2.Qxe6#
      • 1...Qxf7
        • 2.Qa8#
      • 1...Rxf7
        • 2.Qa8#
      • 1...Sf5!
    • 1.Qe4+?
      • 1...Kd7
        • 2.Qc6#
      • 1...Se6+
        • 2.Qxe6#
      • 1...Kxf7!
    • 1.Qb7?
      • threat
        • 2.Bc6#
        • 2.Qe7#
      • 1...Qxf7
        • 2.Qc8#
      • 1...Rxf7
        • 2.Qc8#
      • 1...Sf5
        • 2.Bc6#
      • 1...Se6+!
    • 1.Qa8+?
      • 1...Kd7
        • 2.Qc6#
      • 1...Kxf7!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Bc6#
      • 1...Se6+
        • 2.Qxe6#
      • 1...Kd7
        • 2.Qc6#
      • 1...Qxf7
        • 2.Qc8#
      • 1...Rxf7
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(b);CHECK,N_GUARD::QAR2(C),XS(b)
  • Tries
    • Try
      • B(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);CHECK,N_GUARD::QAR2(C),XS(b)
        • Q(e);P_PINP(D),SBLOCK,XS(E)::QAR(C)
        • R(d);P_PINP(D),SBLOCK,XS(E)::QAR(C)
      • Refutation
        • S(b);
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(C)
        • S(b);CHECK,N_GUARD,P_SPINS(b)::QAR2(C),XS(b)
      • Refutation
        • K(c);S_FLIGHT,XS(E)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);P_PINP(D),SBLOCK,XS(E)::QAR2(C)
        • R(d);P_PINP(D),SBLOCK,XS(E)::QAR2(C)
        • S(b);::B(A)
      • Refutation
        • S(b);CHECK
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(C)
      • Refutation
        • K(c);S_FLIGHT,XS(E)
  • Actual
    • Q(C);
    • Threat
      • B(A)
    • Vars
      • S(b);CHECK,N_GUARD::QAR2(C),XS(b)
      • K(c);S_FLIGHT::QAB1(C)
      • Q(e);P_PINP(D),SBLOCK,XS(E)::QAR2(C)
      • R(d);P_PINP(D),SBLOCK,XS(E)::QAR2(C)
HTML5 logo

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).