MESON Chess Problem Database

Problem Display
PID: 144059 (8/7K/7Q/6p1/6p1/6k1/4R1N1/8 w - - 0 1)

Magner, Siegfried

Deutsches Wochenschach, 1907

8/7K/7Q/6p1/6p1/6k1/4R1N1/8

#2

4 + 3

119 Tidskrift for Schack 1909
3713 Snap 2012
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qxg5?
      • 1...Kf3
        • 2.Qe3#
      • 1...Kh3
        • 2.Qh4#
      • 1...Kh2!
    • 1.Qh2+?
      • 1...Kf3
        • 2.Se1#
      • 1...Kxh2!
    • 1.Qh4+?
      • 1...Kf3
        • 2.Qf2#
      • 1...gxh4!
    • 1.Qd6+?
      • 1...Kf3
        • 2.Qd3#
      • 1...Kh3!
  • Keys
    • 1.Sh4!
      • 1...Kh3
        • 2.Sf5#
      • 1...Kf4
        • 2.Qd6#
      • 1...gxh4
        • 2.Qe3#

Anticipated by 9360(1901)

This anticipates 107321(1909), 142465(1972), 27356(2001), 198081(2015)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);P_PINP(b),XP(c)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(C)
      • Refutation
        • P(c);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(B);
    • Vars
      • K(a);P-FLIGHT::QAR(C)+S(B)
      • K(a);P_SPINP(c),S_FLIGHT::QAB(C)
      • P(c);OGATE,SBLOCK,XS(B)::QAR2(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).