MESON Chess Problem Database

Problem Display
PID: 234519 (8/8/5K2/2p5/4pk2/1n1R3n/Q6N/4r3 w - - 0 1)

Speckmann, Werner

Freie Presse, 1966

8/8/5K2/2p5/4pk2/1n1R3n/Q6N/4r3

#2

4 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Qxf2#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qe5#
      • 1...Sd4
        • 2.Qb8#
      • 1...exd3!
    • 1.Qe2?
      • threat
        • 2.Qg4#
      • 1...exd3
        • 2.Qf3#
      • 1...Rg1
        • 2.Qe3#
      • 1...Sf2
        • 2.Qxf2#
      • 1...Rxe2!
    • 1.Qg2?
      • threat
        • 2.Qg3#
        • 2.Qg4#
      • 1...exd3
        • 2.Qf3#
      • 1...Re3
        • 2.Qg4#
      • 1...Sf2
        • 2.Qxf2#
        • 2.Qg3#
        • 2.Qg5#
      • 1...e3
        • 2.Qf3#
        • 2.Qg4#
      • 1...Rg1!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qb8#
      • 1...exd3
        • 2.Qf3#
      • 1...e3
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(c);N_GUARD::QAR2(A),XS(c)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(b);OGATE::QAB(A)
      • Refutation
        • P(d);XR(C)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(d);N_GUARD,XR(C)::QAR1(A)
        • R(a);N_GUARD::QAB1(A)
        • S(c);N_GUARD::QAR2(A),XS(c)
      • Refutation
        • R(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);N_GUARD,XR(C)::QAR1(A)
        • R(a);::QAR1(A)
      • Refutation
        • R(a);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • P(d);OGATE,XR(C)::QAR1(A)
      • P(d);OGATE::QAR1(A)
HTML5 logo

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).