MESON Chess Problem Database

Problem Display
PID: 170487 (8/8/R7/8/8/8/Q5BP/K5kr w - - 0 1)

Massmann, Wilhelm Karl Heinrich

Basler Nachrichten, 1971

8/8/R7/8/8/8/Q5BP/K5kr

#2

5 + 2

6490 yacpdb 2018
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rb6?
      • 1...Rxh2
        • 2.Rb1#
      • 1...Kxh2+!
    • 1.Rc6?
      • 1...Rxh2
        • 2.Rc1#
      • 1...Kxh2+!
    • 1.Rd6?
      • 1...Rxh2
        • 2.Rd1#
      • 1...Kxh2+!
    • 1.Re6?
      • 1...Rxh2
        • 2.Re1#
      • 1...Kxh2+!
    • 1.Rf6?
      • 1...Rxh2
        • 2.Rf1#
        • 2.Qf2#
      • 1...Kxh2+!
    • 1.Qe2?
      • 1...Rxh2
        • 2.Qf1#
      • 1...Kxh2+!
    • 1.Qf2+?
      • 1...Kxh2+
        • 2.Bf1#
      • 1...Kxf2+!
  • Keys
    • 1.Rg6!
      • threat
        • 2.Bh3#
      • 1...Kxh2+
        • 2.Bf1#
      • 1...Rxh2
        • 2.Qa7#

Anticipated by 4949(1895), 16918(1944)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(E);
      • Vars
        • R(b);SBLOCK,XP(D)::R(E)
      • Refutation
        • K(a);CHECK,S_FLIGHT,XP(D)
    • Try
      • R(E);
      • Vars
        • R(b);SBLOCK,XP(D)::R(E)
      • Refutation
        • K(a);CHECK,S_FLIGHT,XP(D)
    • Try
      • R(E);
      • Vars
        • R(b);SBLOCK,XP(D)::R(E)
      • Refutation
        • K(a);CHECK,S_FLIGHT,XP(D)
    • Try
      • R(E);
      • Vars
        • R(b);SBLOCK,XP(D)::R(E)
      • Refutation
        • K(a);CHECK,S_FLIGHT,XP(D)
    • Try
      • R(E);
      • Refutation
        • K(a);CHECK,S_FLIGHT,XP(D)
    • Try
      • Q(B);
      • Vars
        • R(b);SBLOCK,XP(D)::QAR1(B)
      • Refutation
        • K(a);CHECK,S_FLIGHT,XP(D)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);CHECK,S_FLIGHT,XP(D)::QAR(B)+B(C)
      • Refutation
        • K(a);CHECK,S_FLIGHT,XQ(B)
  • Actual
    • R(E);
    • Threat
      • R(E)+B(C)
    • Vars
      • K(a);CHECK,S_FLIGHT,XP(D)::QAR(B)+B(C)
      • R(b);SBLOCK,XP(D)::QAB(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).