MESON Chess Problem Database

Problem Display
PID: 282730 (8/8/5p2/5B2/3B3p/3pR2r/3K2k1/4Q3 w - - 0 1)

Hoffmann, Martin Wolfgang

Zurcher Woche, 1970

(First published on Fri Oct 9 1970)

8/8/5p2/5B2/3B3p/3pR2r/3K2k1/4Q3

#2

5 + 5

15601 Albrecht-Leiss-Degener Collection 2025

SOLUTION

  • SOUND
  • Sets
    • 1...Rh2
      • 2.Be4#
  • Tries
    • 1.Be4+?
      • 1...Kh2
        • 2.Qf2#
        • 2.Qh1#
      • 1...Rf3!
    • 1.Re2+?
      • 1...Kf3
        • 2.Qf2#
      • 1...dxe2!
    • 1.Qf2+?
      • 1...Kh1
        • 2.Re1#
        • 2.Rxh3#
      • 1...Kxf2!
    • 1.Qf1+?
      • 1...Kh2
        • 2.Rxh3#
      • 1...Kxf1!
    • 1.Qe2+?
      • 1...Kg1
        • 2.Rxh3#
      • 1...Kh1
        • 2.Rxh3#
      • 1...dxe2!
  • Keys
    • 1.Rf3!
      • 1...Kh2
        • 2.Qg1#
      • 1...Kxf3
        • 2.Qf2#
      • 1...Rxf3
        • 2.Qg1#
      • 1...Rh1
        • 2.Qf2#
      • 1...Rh2
        • 2.Qf1#
      • 1...Rg3
        • 2.Rf2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD,SBLOCK::B(E)
  • Tries
    • Try
      • B(E);CHECK
      • Refutation
        • R(c);P_SPINR(c)
    • Try
      • R(C);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR1(A)
      • Refutation
        • P(b);XR(C)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT::R1(C),XR(c)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT,S_CUTP(b)::B(D)+R(C),XR(c)
        • K(a);S_CUTP(b),S_FLIGHT::R(C),XR(c)
      • Refutation
        • P(b);XQ(A)
  • Actual
    • R(C);
    • Vars
      • K(a);N_GUARD,P-FLIGHT::QAB1(A)
      • K(a);N_GUARD,S_FLIGHT,XR(C)::QAR1(A)
      • R(c);SBLOCK,XR(C)::QAR1(A)
      • R(c);SBLOCK::QAR1(A)
      • R(c);SBLOCK::QAB1(A)
      • R(c);SBLOCK::R1(C)
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).