MESON Chess Problem Database

Problem Display
PID: 176156 (2K5/6B1/2Nk4/8/Q7/8/8/8 w - - 0 1)

Becker, Willy

Schach-Echo, 1953

2K5/6B1/2Nk4/8/Q7/8/8/8

#2

4 + 1

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sb4?
      • 1...Ke6
        • 2.Qd7#
      • 1...Ke7
        • 2.Qd7#
      • 1...Kc5!
    • 1.Sd4?
      • 1...Kd5
        • 2.Qc6#
      • 1...Ke7
        • 2.Qd7#
      • 1...Kc5!
    • 1.Sa5?
      • 1...Kd5
        • 2.Qc6#
      • 1...Ke6
        • 2.Qd7#
      • 1...Ke7
        • 2.Qd7#
      • 1...Kc5!
    • 1.Sb8?
      • 1...Kd5
        • 2.Qc6#
      • 1...Ke6
        • 2.Qd7#
      • 1...Ke7
        • 2.Qd7#
      • 1...Kc5!
    • 1.Sd8?
      • 1...Kd5
        • 2.Qc6#
        • 2.Qd4#
      • 1...Ke7
        • 2.Qd7#
      • 1...Kc5!
    • 1.Qd4+?
      • 1...Ke6
        • 2.Qd7#
      • 1...Kxc6!
  • Keys
    • 1.Sa7!
      • 1...Kc5
        • 2.Qd4#
      • 1...Kd5
        • 2.Qc6#
      • 1...Ke6
        • 2.Qd7#
      • 1...Ke7
        • 2.Qd7#

Anticipated by 77671(1933), 77281(1950)

This anticipates 23071(1996)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
  • Actual
    • S(B);
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAB1(A)
      • K(a);S_FLIGHT::QAR1(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).