MESON Chess Problem Database

Problem Display
PID: 232325 (8/1p6/8/8/kNQ5/3K4/5B2/8 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1971

8/1p6/8/8/kNQ5/3K4/5B2/8

#2

4 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kc3?
      • 1...Ka3
        • 2.Sc2#
        • 2.Qa2#
        • 2.Qb3#
      • 1...b5
        • 2.Qa2#
      • 1...b6
        • 2.Qa6#
      • 1...Ka5!
    • 1.Sd5+?
      • 1...Ka5
        • 2.Be1#
        • 2.Bb6#
      • 1...Ka3!
    • 1.Bc5?
      • threat
        • 2.Sc6#
      • 1...Ka3
        • 2.Qa2#
      • 1...b5
        • 2.Qa2#
      • 1...Ka5!
  • Keys
    • 1.Be1!
      • threat
        • 2.Sc2#
      • 1...Ka3
        • 2.Qa2#
      • 1...Ka5
        • 2.Sd5#
      • 1...b5
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(b);SBLOCK::QAR2(D)
        • P(b);N_GUARD::QAR2(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(C);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(A);
      • Threat
        • QAR(D)+S(C)
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
        • P(b);SBLOCK::QAR2(D)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(A);
    • Threat
      • QAR(D)+S(C)
    • Vars
      • K(a);P-FLIGHT::QAR1(D)
      • K(a);P-FLIGHT::B(A)+S(C)
      • P(b);SBLOCK::QAR2(D)
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).