MESON Chess Problem Database

Problem Display
PID: 103493 (8/3kN3/4N3/6Q1/1R4K1/8/8/8 w - - 0 1)

Bryukhanov, Ivan Oleksandrovich

Shakhmatnie Zadachi Tabri, 1996

8/3kN3/4N3/6Q1/1R4K1/8/8/8

#2

5 + 1

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Kf5?
      • 1...Kd6
        • 2.Rd4#
      • 1...Ke8!
    • 1.Rb7+?
      • 1...Kd6
        • 2.Qd5#
      • 1...Ke8
        • 2.Qh5#
        • 2.Qg6#
        • 2.Qg8#
      • 1...Kxe6!
    • 1.Qf6?
      • 1...Kd6
        • 2.Rd4#
      • 1...Ke8!
  • Keys
    • 1.Sc8!
      • 1...Kc6
        • 2.Qb5#
      • 1...Kxe6
        • 2.Qf5#
      • 1...Kxc8
        • 2.Qd8#
      • 1...Ke8
        • 2.Qe7#

Anticipated by 201345(1922), 76028(1925), 79523(1940), 16695(1942), 176153(1953), 110513(1955), 176168(1959), 104712(1969), 7995(1995)

FEATURES

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