MESON Chess Problem Database

Problem Display
PID: 218032 (4K3/7p/1P3k1P/4p1p1/4n1B1/3R4/8/6Q1 w - - 0 1)

Minckwitz, Johannes

Deutsche Schachzeitung, 1872

4K3/7p/1P3k1P/4p1p1/4n1B1/3R4/8/6Q1

#2

6 + 5

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Rd6#
    • 1...Sf2
      • 2.Rd6#
    • 1...Sc3
      • 2.Rd6#
    • 1...Sg3
      • 2.Rd6#
    • 1...Sd6+
      • 2.Rxd6#
  • Tries
    • 1.Qf2+?
      • 1...Sxf2
        • 2.Rd6#
      • 1...Kg6!
    • 1.Qf1+?
      • 1...Sf2
        • 2.Rd6#
      • 1...Kg6!
  • Keys
    • 1.Qb1!
      • 1...Sd6+
        • 2.Rxd6#
      • 1...Kg6
        • 2.Rd6#
      • 1...Sc5
        • 2.Rf3#
      • 1...Sd2
        • 2.Rd6#
      • 1...Sf2
        • 2.Rf3#
        • 2.Rd6#
      • 1...Sc3
        • 2.Rf3#
        • 2.Rd6#
      • 1...Sg3
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::R(B)
    • S(a);CHECK,N_GUARD::R(B),XS(a)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);XQ(A)::R(B)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);P_SPINS(a)::R(B)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • S(a);CHECK,N_GUARD::R(B),XS(a)
      • K(d);P-FLIGHT::R(B)
      • S(a);::R(B)
      • S(a);N_GUARD::R(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).