MESON Chess Problem Database

Problem Display
PID: 227619 (3B4/6pp/8/6Pk/4Q3/8/5K2/8 w - - 0 1)

Langweil, Walter

Studentsky casopis, 1926

3B4/6pp/8/6Pk/4Q3/8/5K2/8

#2

4 + 3

6490 yacpdb 2020
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Kf3?
      • threat
        • 2.Qxh7#
      • 1...g6
        • 2.Qg4#
      • 1...h6!
    • 1.Kg3?
      • threat
        • 2.Qxh7#
      • 1...g6
        • 2.Qh1#
        • 2.Qf3#
        • 2.Qe2#
        • 2.Qg4#
        • 2.Qh4#
      • 1...h6!
    • 1.Qf3+?
      • 1...Kh4
        • 2.g6#
      • 1...Kg6!
    • 1.g6?
      • 1...hxg6
        • 2.Qh4#
      • 1...h6
        • 2.Qf5#
      • 1...Kh6!
  • Keys
    • 1.Qf5!
      • 1...Kh4
        • 2.g6#
      • 1...h6
        • 2.g6#
      • 1...g6
        • 2.Qh3#

This anticipates 229328(1973)

FEATURES

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