MESON Chess Problem Database

Problem Display
PID: 227482 (8/8/2Q5/7b/8/4p3/2R5/K2kB3 w - - 0 1)

Leopold, Dr Rudolf L

Allgemeine Zeitung Chemnitz, 1926

8/8/2Q5/7b/8/4p3/2R5/K2kB3

#2

4 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe1
      • 2.Qh1#
    • 1...Be2
      • 2.Rc1#
    • 1...e2
      • 2.Rc1#
  • Tries
    • 1.Qb5?
      • threat
        • 2.Qb1#
      • 1...Kxc2
        • 2.Qb1#
      • 1...Kxe1!
    • 1.Qd5+?
      • 1...Kxe1
        • 2.Qh1#
      • 1...Kxc2!
    • 1.Qb6?
      • threat
        • 2.Qb1#
      • 1...Kxc2
        • 2.Qb1#
      • 1...Kxe1!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qb1#
      • 1...Kxe1
        • 2.Qh1#
      • 1...Kxc2
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(a);OGATEB,P-FLIGHT,XB(B)::QAR(D)
    • B(c);SBLOCK::R1(C)
    • P(b);SBLOCK::R1(C)
  • Tries
    • Try
      • Q(D);
      • Threat
        • QAR2(D)
      • Vars
        • K(a);S_FLIGHT,XR(C)::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT,XB(B)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATEB,P-FLIGHT,XB(B)::QAR(D)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
    • Try
      • Q(D);
      • Threat
        • QAR2(D)
      • Vars
        • K(a);S_FLIGHT,XR(C)::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT,XB(B)
  • Actual
    • Q(D);
    • Threat
      • QAR2(D)
    • Vars
      • K(a);OGATEB,P-FLIGHT,XB(B)::QAR(D)
      • K(a);S_FLIGHT,XR(C)::QAB1(D)
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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).