MESON Chess Problem Database

Problem Display
PID: 91833 (8/8/8/6Q1/2rk4/2R5/4K3/1B6 w - - 0 1)

Belchikov, Nikolai Ivanovich

Shakhmatnaya kompozitsiya, 1975

8/8/8/6Q1/2rk4/2R5/4K3/1B6

#2

4 + 2

6490 yacpdb 2009
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Qc5#
    • 1...Rb4
      • 2.Qc5#
    • 1...Rc5
      • 2.Qxc5#
  • Keys
    • 1.Ba2!
      • threat
        • 2.Rxc4#
      • 1...Kxc3
        • 2.Qd2#
      • 1...Ke4
        • 2.Rxc4#
      • 1...Rxc3
        • 2.Qd5#
      • 1...Ra4
        • 2.Qe3#
      • 1...Rb4
        • 2.Qe3#
      • 1...Rc5
        • 2.Qe3#
      • 1...Rc6
        • 2.Qe3#
      • 1...Rc7
        • 2.Qe3#
      • 1...Rc8
        • 2.Qe3#

This anticipates 52692(2004)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD::QAB1(D)
    • R(a);N_GUARD::QAB1(D),XR(a)
  • Actual
    • B(A);
    • Threat
      • R1(C),XR(a)
    • Vars
      • K(b);S_FLIGHT,XR(C)::QAB1(D)
      • K(b);P-FLIGHT::R(C),XR(a)
      • R(a);SBLOCK,XR(C)::QAR1(D)
      • R(a);::QAB1(D)
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).