MESON Chess Problem Database

Problem Display
PID: 121454 (8/4B3/4p3/4kp2/8/2K1p3/4PP2/7Q w - - 0 1)

Koloc, Jan

Ruch, 1947

8/4B3/4p3/4kp2/8/2K1p3/4PP2/7Q

#2

5 + 4

6490 yacpdb 2009
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Qd1?
      • threat
        • 2.Qd4#
      • 1...Ke4
        • 2.Qd4#
      • 1...Kf4
        • 2.Qd4#
      • 1...f4!
    • 1.Qh8+?
      • 1...Ke4
        • 2.Qd4#
      • 1...Kf4
        • 2.Qd4#
      • 1...Kd5!
  • Keys
    • 1.f3!
      • 1...Kf4
        • 2.Qh2#
      • 1...Kd5
        • 2.f4#
      • 1...f4
        • 2.Qh5#

Anticipated by 216563(1887)

FEATURES

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