MESON Chess Problem Database

Problem Display
PID: 120045 (6r1/P3R3/k7/pp1P3b/Np4pK/8/2P5/q2n1Q2 w - - 0 1)

Palkoska, Emil

Tidskrift for Schack, 1908

6r1/P3R3/k7/pp1P3b/Np4pK/8/2P5/q2n1Q2

#2

7 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6+
      • 2.Qxf6#
    • 1...Qb1
      • 2.Qf6#
    • 1...Qc1
      • 2.Qf6#
    • 1...Qa2
      • 2.Qf6#
    • 1...Qa3
      • 2.Qf6#
    • 1...Qxa4
      • 2.Qf6#
    • 1...Rg5
      • 2.a8Q#
      • 2.a8R#
    • 1...Rg6
      • 2.a8Q#
      • 2.a8R#
    • 1...Rg7
      • 2.a8Q#
      • 2.a8R#
    • 1...Rb8
      • 2.axb8S#
    • 1...Be8
      • 2.a8Q#
      • 2.a8R#
    • 1...Sb2
      • 2.Qf6#
    • 1...Sc3
      • 2.Qf6#
  • Keys
    • 1.c4!
      • threat
        • 2.cxb5#
      • 1...Qf6+
        • 2.Qxf6#
      • 1...Qxa4
        • 2.Qf6#
      • 1...bxa4
        • 2.c5#
      • 1...bxc4
        • 2.Qxc4#
      • 1...bxc4 ep
        • 2.Qf6#
      • 1...Rb8
        • 2.axb8S#
      • 1...Be8
        • 2.a8Q#
        • 2.a8R#
      • 1...Sc3
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(a);CHECK,N_GUARD::QAR(A),XQ(a)
    • Q(a);N_GUARD::QAR(A)
    • Q(a);N_GUARD,XS(C)::QAR(A)
    • R(i);N_GUARD::P=Q
    • R(i);OGATE::PXR(i)=S
    • B(g);S_CUTR(i)::P=Q
    • S(b);S_CUTQ(a)::QAR(A)
  • Actual
    • P(B);N_PINP(f)
    • Threat
      • P(B),XP(f)
    • Vars
      • Q(a);CHECK,N_GUARD::QAR(A),XQ(a)
      • Q(a);N_GUARD,XS(C)::QAR(A)
      • P(f);XS(C)::QAB(A)+P(B)
      • P(f);OGATE,P_SPINP(f),XP(B)::QAB(A),XP(f)
      • P(c);EP,P_SPINP(f),S_CUTQ(a),XP(B)::QAR(A)
      • R(i);OGATE::PXR(i)=S
      • B(g);S_CUTR(i)::P=Q
      • S(b);S_CUTQ(a)::QAR(A)
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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).