MESON Chess Problem Database

Problem Display
PID: 146277 (2B1n3/K4P1q/N2k3r/1PR2nN1/1P5p/2B1R1p1/8/6b1 w - - 0 1)

Backer, Sid

American Chess Problemist, 1950

2B1n3/K4P1q/N2k3r/1PR2nN1/1P5p/2B1R1p1/8/6b1

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf7+
      • 2.Sxf7#
    • 1...Rh5
      • 2.Re6#
    • 1...Re6
      • 2.Rxe6#
    • 1...Se7
      • 2.Be5#
      • 2.fxe8S#
    • 1...Sfg7
      • 2.f8Q#
      • 2.f8B#
    • 1...Sf6
      • 2.Re6#
  • Keys
    • 1.Ree5!
      • threat
        • 2.Se4#
      • 1...Qxf7+
        • 2.Sxf7#
      • 1...Bxc5+
        • 2.bxc5#
      • 1...Re6
        • 2.Rxe6#
      • 1...Se3
        • 2.Rc6#
      • 1...Sd4
        • 2.Rcd5#
      • 1...Se7
        • 2.fxe8S#
      • 1...Sfg7
        • 2.f8Q#
        • 2.f8B#
      • 1...Sf6
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(g);CHECK,XP(I)::S(F),XQ(g)
    • R(f);N_GUARD::R1(B)
    • R(f);N_GUARD::R1(B),XR(f)
    • S(d);N_PINP(I)::P=Q
    • S(h);S_CUTR(f)::R1(B)
  • Actual
    • R(B);P_SPINR(E)
    • Threat
      • S(F)
    • Vars
      • Q(g);CHECK,XP(I)::S(F),XQ(g)
      • B(a);CHECK,OGATE,XR(E)::P(C),XB(a)
      • R(f);N_GUARD::R1(B),XR(f)
      • S(d);N_PINR(E)::R1(E)
      • S(d);N_PINP(I)::PXS(h)=S
      • S(d);N_PINP(I)::P=Q
      • S(h);S_CUTR(f)::R1(B)
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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).