MESON Chess Problem Database

Problem Display
PID: 173155 (r3N2k/7P/8/P3R2R/8/8/8/K1B1N2r w - - 0 1)

Ling, John Francis

Problem Observer, 1976

r3N2k/7P/8/P3R2R/8/8/8/K1B1N2r

#2

8 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Keys
    • 1.Bb2!
      • threat
        • 2.Re2#
        • 2.Re3#
        • 2.Re4#
        • 2.Rb5#
        • 2.Rc5#
        • 2.Rd5#
        • 2.Ref5#
        • 2.Reg5#
        • 2.Re6#
        • 2.Re7#
      • 1...Rxe1+
        • 2.Rxe1#
      • 1...Rxa5+
        • 2.Rxa5#
      • 1...Rxh5
        • 2.Rxh5#
      • 1...Rxe8
        • 2.Re6#
        • 2.Re7#
        • 2.Rxe8#
      • 1...Rf1
        • 2.Ref5#
      • 1...Rg1
        • 2.Reg5#
      • 1...Rh2
        • 2.Re2#
      • 1...Rh3
        • 2.Re3#
      • 1...Rh4
        • 2.Re4#
      • 1...Ra6
        • 2.Re6#
      • 1...Ra7
        • 2.Re7#
      • 1...Rb8
        • 2.Rb5#
      • 1...Rc8
        • 2.Rc5#
      • 1...Rd8
        • 2.Rd5#

There are these versions: 133141

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
  • Actual
    • B(B);P_SPINS(C)
    • Threat
      • DUALS(10)
    • Vars
      • R(a);CHECK,OGATE,XS(C)::B(B)+R(E),XR(a)
      • R(b);CHECK,OGATE,XP(D)::B(B)+R(E),XR(b)
      • R(a);N_PINS(C),OGATE,XR(F)::B(B)+R(E),XR(a)
      • R(a);::B(B)+R(E)
      • R(a);N_PINS(C)::B(B)+R(E)
      • R(b);::B(B)+R(E)
      • R(b);N_PINP(D)::B(B)+R(E)
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).