MESON Chess Problem Database

Problem Display
PID: 237314 (8/1K6/8/5N2/4kpP1/3N4/3Q4/8 w - - 0 1)

Speckmann, Werner

Schweizerische Arbeiter Schachzeitung, 1968

8/1K6/8/5N2/4kpP1/3N4/3Q4/8

#2

5 + 2

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kc6?
      • threat
        • 2.Qe2#
      • 1...f3
        • 2.Qe3#
      • 1...Kf3!
    • 1.Sc1?
      • 1...Kf3
        • 2.Qe2#
      • 1...f3
        • 2.Qd4#
      • 1...Ke5!
    • 1.Sf2+?
      • 1...Ke5
        • 2.Qd6#
      • 1...Kf3!
    • 1.Sxf4?
      • threat
        • 2.Qe3#
      • 1...Ke5
        • 2.Qd4#
      • 1...Kf3!
    • 1.Sc5+?
      • 1...Ke5
        • 2.Qd4#
        • 2.Qd6#
      • 1...Kf3!
    • 1.Qc3?
      • 1...Kd5
        • 2.Qc6#
      • 1...f3
        • 2.Qd4#
        • 2.Qc4#
      • 1...Kf3!
  • Keys
    • 1.Qc2!
      • 1...Kf3
        • 2.Se5#
      • 1...Kd5
        • 2.Qc6#
      • 1...f3
        • 2.Qc4#

This anticipates 245852(2002)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Threat
        • QAR2(A)
      • Vars
        • P(b);N_GUARD::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • P(b);SBLOCK::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);XP(b)
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::S(B)
      • K(a);S_FLIGHT::QAB1(A)
      • P(b);SBLOCK::QAR2(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).