MESON Chess Problem Database

Problem Display
PID: 143967 (5R1K/8/4p3/2p2N1Q/2r1k3/2p1pNPP/4p2P/3r4 w - - 0 1)

Hansen, Moritz

Tidskrift for Schack, 1909

5R1K/8/4p3/2p2N1Q/2r1k3/2p1pNPP/4p2P/3r4

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...exf5
      • 2.Qxf5#
  • Tries
    • 1.Qg6?
      • threat
        • 2.Se7#
      • 1...Kd3
        • 2.S5d4#
      • 1...Kxf3
        • 2.Sh4#
      • 1...exf5
        • 2.Qxf5#
      • 1...Rd5
        • 2.Sd6#
      • 1...Kd5!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Se7#
      • 1...Kd3
        • 2.S5d4#
      • 1...Kxf3
        • 2.Sh4#
      • 1...Kd5
        • 2.Qb7#
      • 1...exf5
        • 2.Qxf5#
      • 1...Rd5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(h);OGATE,XS(E)::QAB1(F),XP(h)
  • Tries
    • Try
      • Q(F);
      • Threat
        • QAB(F)+S(E)
      • Vars
        • K(f);S_FLIGHT::QAB(F)+S(E)
        • K(f);S_FLIGHT,XS(B)::R(G)+S(E),DCHECK
        • P(h);OGATE,P_SPINP(h),XS(E)::QAB1(F),XP(h)
        • R(a);SBLOCK::QAB(F)+S(E),DCHECK
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • Q(F);
    • Threat
      • QAB(F)+S(E)
    • Vars
      • K(f);S_FLIGHT::QAB(F)+S(E)
      • K(f);S_FLIGHT,XS(B)::R(G)+S(E),DCHECK
      • K(f);S_FLIGHT::QAB(F)
      • P(h);OGATE,P_SPINP(h),XS(E)::QAB1(F),XP(h)
      • R(a);SBLOCK::QAB(F)+S(E),DCHECK
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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).