MESON Chess Problem Database

Problem Display
PID: 265819 (1b6/8/8/8/8/8/3R1R2/k2K4 w - - 0 1)

Lipton, Michael

Best Problems, 2022

1b6/8/8/8/8/8/3R1R2/k2K4

#2

3 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Ke1?
      • threat
        • 2.Rd1#
      • 1...Kb1
        • 2.Rd1#
      • 1...Bf4!
    • 1.Ke2?
      • threat
        • 2.Rf1#
      • 1...Kb1
        • 2.Rf1#
      • 1...Bg3!
    • 1.Rc2?
      • threat
        • 2.Rc1#
      • 1...Kb1
        • 2.Rc1#
      • 1...Bf4!
    • 1.Rf1?
      • threat
        • 2.Ke2#
      • 1...Kb1
        • 2.Ke2#
      • 1...Bg3!
  • Keys
    • 1.Ra2+!
      • 1...Kb1
        • 2.Rfb2#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • R(B)
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • B(b);
    • Try
      • K(A);S_FLIGHT
      • Threat
        • R(C)
      • Vars
        • K(a);P-FLIGHT::R(C)
      • Refutation
        • B(b);
    • Try
      • R(B);
      • Threat
        • R(B)
      • Vars
        • K(a);P-FLIGHT::R1(B)
      • Refutation
        • B(b);
    • Try
      • R(C);
      • Threat
        • R(C)+K(A)
      • Vars
        • K(a);P-FLIGHT::R(C)+K(A)
      • Refutation
        • B(b);
  • Actual
    • R(B);CHECK
    • Vars
      • K(a);P-FLIGHT::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).