MESON Chess Problem Database

Problem Display
PID: 73852 (r2Nn1R1/n1BkP1br/B1NP1p2/5b2/2Q1p3/1K5p/8/8 w - - 0 1)

Overkamp, G

Tijdschrift vd KNSB, 1938

r2Nn1R1/n1BkP1br/B1NP1p2/5b2/2Q1p3/1K5p/8/8

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rb8+
      • 2.Sxb8#
    • 1...Rxd8
      • 2.exd8Q#
      • 2.exd8R#
    • 1...Be6
      • 2.Qxe6#
    • 1...Bg6
      • 2.Qe6#
    • 1...Bf8
      • 2.exf8S#
    • 1...Sxc6
      • 2.Qxc6#
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qxe8#
      • 1...Rb8+
        • 2.Sxb8#
      • 1...Be6+
        • 2.Qxe6#
      • 1...Rxd8
        • 2.exd8S#
      • 1...Sxd6
        • 2.e8Q#
        • 2.e8B#
      • 1...Sxc7
        • 2.e8S#
      • 1...Bg6
        • 2.Qe6#
      • 1...Bf8
        • 2.exf8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(i);CHECK,N_GUARD::S(D),XR(i)
    • R(i);OGATE,XS(H)::PXR(i)=Q
    • B(c);N_GUARD,P_PINQ(B)::QAB1(B),XB(c)
    • B(c);N_GUARD::QAB1(B)
    • B(g);OGATE::PXB(g)=S
    • S(e);OGATE,XS(D)::QAB1(B),XS(e)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B),XS(j)
    • Vars
      • R(i);CHECK,N_GUARD::S(D),XR(i)
      • B(c);CHECK,N_GUARD::QAB1(B),XB(c)
      • R(i);OGATE,XS(H)::PXR(i)=S
      • S(j);OGATE,XP(E)::P=Q
      • S(j);OGATE,XB(F)::P=S
      • B(c);N_GUARD::QAB1(B)
      • B(g);OGATE::PXB(g)=S
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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).