MESON Chess Problem Database

Problem Display
PID: 164209 (8/8/8/6K1/6Q1/8/4Nk2/1R6 w - - 0 1)

Antipov, Viacheslav Pavlovich

Sa ogneupory, 1988

8/8/8/6K1/6Q1/8/4Nk2/1R6

#2

4 + 1

5454 Near Snap 2017
15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Rb2?
      • 1...Ke1
        • 2.Qg1#
      • 1...Kf1
        • 2.Qg1#
      • 1...Ke3!
    • 1.Qf4+?
      • 1...Kg2
        • 2.Qg3#
      • 1...Kxe2!
  • Keys
    • 1.Sc1!
      • 1...Ke1
        • 2.Qe2#
      • 1...Kf1
        • 2.Sd3#
      • 1...Ke3
        • 2.Qf4#

Anticipated by 74150(1929), 11829(1972)

This anticipates 154644(2006), 146940(2012)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);
      • Vars
        • K(a);S_FLIGHT::QAR2(C)
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
  • Actual
    • S(B);
    • Vars
      • K(a);S_FLIGHT::QAR1(C)
      • K(a);P-FLIGHT::R(A)+S(B)
      • K(a);S_FLIGHT::QAB1(C)
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).