MESON Chess Problem Database

Problem Display
PID: 17663 (K7/n1B3N1/2p4Q/2R2p1r/RP1kP1N1/3pr2q/6n1/8 w - - 0 1)

Hassberg, Eric Manfred

3rd Prize, Parallele 50, 1948

K7/n1B3N1/2p4Q/2R2p1r/RP1kP1N1/3pr2q/6n1/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4
      • 2.Qd6#
    • 1...fxe4
      • 2.Se6#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Rc4#
        • 2.Qc4#
        • 2.Qe5#
      • 1...Rxe4
        • 2.Rc4#
        • 2.Qc4#
        • 2.Qd7#
        • 2.Qd6#
      • 1...fxe4
        • 2.Rc4#
        • 2.Qc4#
      • 1...fxg4
        • 2.Rc4#
        • 2.Qc4#
      • 1...d2
        • 2.Qc4#
      • 1...Qh2
        • 2.Rc4#
        • 2.Qc4#
      • 1...Qg3
        • 2.Rc4#
        • 2.Qc4#
      • 1...f4
        • 2.Rc4#
        • 2.Qc4#
      • 1...Rh8+!
  • Keys
    • 1.Se5!
      • threat
        • 2.Rc4#
      • 1...Kxe4
        • 2.b5#
      • 1...Rxe4
        • 2.Se6#
      • 1...fxe4
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK,XP(C)::QAR2(F)
    • P(f);SBLOCK,XP(C)::S(H)
  • Tries
    • Try
      • Q(F);
      • Threat
        • DUALS(3)
      • Vars
        • P(b);::QAR1(F)
      • Refutation
        • R(g);CHECK
  • Actual
    • S(D);
    • Threat
      • R1(E)
    • Vars
      • K(e);P-FLIGHT,XP(C)::R(A)+P(B)
      • R(c);SBLOCK,XP(C)::S(H)
      • P(f);SBLOCK,XP(C)::QAR2(F)
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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).