MESON Chess Problem Database

Problem Display
PID: 276459 (7b/qp1Q4/3N4/p1pbp3/P5p1/1p1kPp2/3P4/3K4 w - - 0 1)

Hannelius, Jan Ingvar

To Mat, 1954

7b/qp1Q4/3N4/p1pbp3/P5p1/1p1kPp2/3P4/3K4

#2

6 + 11

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Tries
    • 1.Sc4?
      • threat
        • 2.Qxd5#
      • 1...Kxc4
        • 2.Qb5#
      • 1...Ke4
        • 2.Qh7#
      • 1...e4!
    • 1.Qb5+?
      • 1...Bc4
        • 2.Qxc4#
      • 1...c4!
    • 1.Qf5+?
      • 1...Be4
        • 2.Qxe4#
      • 1...e4!
    • 1.Qh7+?
      • 1...Be4
        • 2.Qxe4#
      • 1...e4!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qxd5#
      • 1...Kc4
        • 2.Qb5#
      • 1...Kxe4
        • 2.Qh7#
      • 1...c4
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);P_PINB(g)
      • Threat
        • QAR2(F),XB(g)
      • Vars
        • K(b);N_SPINB(g),OGATEB,S_FLIGHT,XS(E)::QAB1(F)
        • K(b);N_GUARD,N_SPINB(g),S_CUTB(g),S_CUTP(h),S_FLIGHT::QAB(F)
      • Refutation
        • P(h);
    • Try
      • Q(F);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAB1(F),XB(g)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • Q(F);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAB1(F),XB(g)
      • Refutation
        • P(h);P_SPINP(h)
    • Try
      • Q(F);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAB1(F),XB(g)
      • Refutation
        • P(h);P_SPINP(h)
  • Actual
    • S(E);P_PINB(g)
    • Threat
      • QAR2(F),XB(g)
    • Vars
      • K(b);N_GUARD,N_SPINB(g),S_CUTB(g),S_CUTP(f),S_FLIGHT::QAB1(F)
      • K(b);N_SPINB(g),OGATEB,S_FLIGHT,XS(E)::QAB(F)
      • P(f);SBLOCK::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).