MESON Chess Problem Database

Problem Display
PID: 224505 (8/B5Q1/3KBq2/2r5/1ppkpr2/2Rbb1N1/5R2/8 w - - 0 1)

Friedlander, William

Toledo Daily Blade, 1887

8/B5Q1/3KBq2/2r5/1ppkpr2/2Rbb1N1/5R2/8

#2

7 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5+
      • 2.Qxe5#
    • 1...Rg4
      • 2.Qxf6#
    • 1...Rh4
      • 2.Qxf6#
    • 1...Bb1
      • 2.Se2#
    • 1...Bc2
      • 2.Se2#
    • 1...Be2
      • 2.Sxe2#
    • 1...bxc3
      • 2.Bxc5#
  • Tries
    • 1.Rb3?
      • threat
        • 2.Bxc5#
      • 1...Qe5+
        • 2.Qxe5#
      • 1...Rf5
        • 2.Sxf5#
      • 1...cxb3!
  • Keys
    • 1.Rfc2!
      • threat
        • 2.Bxc5#
      • 1...Qe5+
        • 2.Qxe5#
      • 1...Bxc2
        • 2.Se2#
      • 1...Rf5
        • 2.Sxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • Q(i);CHECK,N_PINB(E),OGATE::QAB1(G),XQ(i)
    • R(g);N_GUARD::QAB(G),XQ(i)
    • B(a);N_GUARD::S(C)
    • B(a);N_GUARD::S(C),XB(a)
    • P(c);SBLOCK,XR(B)::B(F),XR(h)
  • Tries
    • Try
      • R(B);
      • Threat
        • B(F),XR(h)
      • Vars
        • Q(i);CHECK,N_PINB(E),OGATE::QAB1(G),XQ(i)
        • R(g);N_GUARD::S(C),XR(g)
      • Refutation
        • P(d);XR(B)
  • Actual
    • R(A);
    • Threat
      • B(F),XR(h)
    • Vars
      • Q(i);CHECK,N_PINB(E),OGATE::QAB1(G),XQ(i)
      • B(a);N_GUARD,XR(A)::S(C)
      • R(g);N_GUARD::S(C),XR(g)
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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).