MESON Chess Problem Database

Problem Display
PID: 121286 (4bRn1/3PPP2/p4krp/3P1pp1/qBQ3p1/ppPp4/1P2n3/3K4 w - - 0 1)

Scheel, Johan

Skakbladet, 1916

4bRn1/3PPP2/p4krp/3P1pp1/qBQ3p1/ppPp4/1P2n3/3K4

#2

10 + 14

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kg7
      • 2.fxg8Q#
    • 1...Sc1
      • 2.Qd4#
    • 1...Sg1
      • 2.Qd4#
    • 1...Sxc3+
      • 2.Qxc3#
    • 1...Sg3
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sf4
      • 2.Qd4#
  • Keys
    • 1.Qc7!
      • threat
        • 2.fxe8S#
      • 1...Sxc3+
        • 2.Qxc3#
      • 1...Kg7
        • 2.fxg8Q#
      • 1...Qxb4
        • 2.dxe8S#
      • 1...Bxd7
        • 2.fxg8Q#
        • 2.fxg8R#
      • 1...Bxf7
        • 2.e8S#
      • 1...Rg7
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • K(j);S_FLIGHT::PXS(n)=Q
    • S(a);N_GUARD::QAB(E)
    • S(a);CHECK,OGATE,XP(C)::QAB(E),XS(a)
    • S(a);N_GUARD::QAB(E),XS(a)
  • Actual
    • Q(E);
    • Threat
      • PXB(m)=S
    • Vars
      • S(a);CHECK,OGATE,XP(C)::QAB(E),XS(a)
      • K(j);S_FLIGHT::PXS(n)=Q
      • Q(e);N_GUARD,XB(D)::PXB(m)=S
      • B(m);N_GUARD,XP(G)::PXS(n)=Q
      • B(m);OGATE,P_SPINB(m),XP(I)::P=S
      • R(k);SBLOCK::QAR2(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).