MESON Chess Problem Database

Problem Display
PID: 240630 (8/Rr1P2K1/R1Qnk3/1n6/3P4/4N3/8/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Thema Danicum, 1980

8/Rr1P2K1/R1Qnk3/1n6/3P4/4N3/8/8

#2

7 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rb6
      • 2.d8S#
    • 1...Rxd7+
      • 2.Qxd7#
    • 1...Rb8
      • 2.Qe4#
    • 1...Sa3
      • 2.Qxd6#
    • 1...Sc3
      • 2.Qxd6#
    • 1...Sxd4
      • 2.Qxd6#
    • 1...Sxa7
      • 2.Qxd6#
    • 1...Sc7
      • 2.Qxd6#
  • Tries
    • 1.Rxb7?
      • threat
        • 2.Qe4#
        • 2.d8S#
      • 1...Sxd4
        • 2.Qe4#
        • 2.Qxd6#
      • 1...Sc3
        • 2.Qxd6#
        • 2.d8S#
      • 1...Sc7
        • 2.Qxd6#
      • 1...Ke7!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qe8#
      • 1...Rxd7+
        • 2.Qxd7#
      • 1...Ke7
        • 2.d8Q#
      • 1...Rb6
        • 2.d8S#
      • 1...Rb8
        • 2.d8S#
      • 1...Sc7
        • 2.d8Q#
        • 2.d8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(d);N_PINP(F)::P=S
    • R(d);CHECK,OGATE,XP(F)::QAB1(D),XR(d)
    • R(d);N_PINP(F)::QAR2(D)
    • S(a);N_GUARD::QAR1(D),XS(b)
    • S(a);N_GUARD,XP(B)::QAR1(D),XS(b)
    • S(a);N_GUARD,XR(E)::QAR1(D),XS(b)
    • S(a);N_GUARD,N_PINP(F)::QAR1(D),XS(b)
  • Tries
    • Try
      • R(E);N_SPINP(F),XR(d)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::QAR1(D),XS(b)
      • Refutation
        • K(c);N_SPINS(b),P-FLIGHT
  • Actual
    • Q(D);
    • Threat
      • QAR2(D)
    • Vars
      • R(d);CHECK,OGATE,P_SPINR(d),XP(F)::QAB1(D),XR(d)
      • K(c);N_PINP(F),N_SPINS(b),P-FLIGHT::P=Q
      • R(d);N_PINP(F),N_SPINS(b)::P=S
      • R(d);N_PINP(F)::P=S
      • S(a);N_PINP(F)::P=Q
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).