MESON Chess Problem Database

Problem Display
PID: 139660 (3R4/8/8/8/8/KR3r2/3N1n2/k7 w - - 0 1)

Davis, Edward

Kipping, Cyril Stanley

The Problemist, 1937

3R4/8/8/8/8/KR3r2/3N1n2/k7

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Rb1#
    • 1...Rf5
      • 2.Rb1#
    • 1...Rf6
      • 2.Rb1#
    • 1...Rf7
      • 2.Rb1#
    • 1...Rf8
      • 2.Rb1#
    • 1...Sd3
      • 2.Rb1#
  • Tries
    • 1.Sxf3?
      • 1...Sd1
        • 2.Rxd1#
      • 1...Sh1
        • 2.Rd1#
      • 1...Sh3
        • 2.Rd1#
      • 1...Se4
        • 2.Rd1#
      • 1...Sg4
        • 2.Rd1#
      • 1...Sd3!
  • Keys
    • 1.Ra8!
      • threat
        • 2.Kb4#
      • 1...Rxb3+
        • 2.Kxb3#
      • 1...Rf4
        • 2.Rb1#
      • 1...Rf5
        • 2.Rb1#
      • 1...Rf6
        • 2.Rb1#
      • 1...Rf7
        • 2.Rb1#
      • 1...Rf8
        • 2.Rb1#
      • 1...Sd3
        • 2.Rb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);N_PINR(C)::R1(C)
    • S(b);N_PINR(C)::R1(C)
  • Tries
    • Try
      • S(A);N_SPINR(C),XR(c)
      • Vars
        • S(b);N_GUARD::R(D),XS(b)
        • S(b);N_GUARD::R(D)
      • Refutation
        • S(b);
  • Actual
    • R(D);
    • Threat
      • R(D)+K(B)
    • Vars
      • R(c);CHECK,XR(C)::R(D)+K(B),XR(c)
      • R(c);N_PINR(C)::R1(C)
      • S(b);N_PINR(C)::R1(C)
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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).