MESON Chess Problem Database

Problem Display
PID: 145127 (2NRb3/2kp4/KN5r/B2Pp3/1P2P3/8/8/8 w - - 0 1)

Perkins, Henry (Harry)

Manchester Weekly Times, 1906

(First published on Sat Apr 7 1906)

2NRb3/2kp4/KN5r/B2Pp3/1P2P3/8/8/8

#2

8 + 5

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Sxd7#
    • 1...Rh2
      • 2.Sxd7#
    • 1...Rh3
      • 2.Sxd7#
    • 1...Rh4
      • 2.Sxd7#
    • 1...Rh5
      • 2.Sxd7#
    • 1...Rh7
      • 2.Sxd7#
    • 1...Rh8
      • 2.Sxd7#
    • 1...Bg6
      • 2.Sxd7#
    • 1...d6
      • 2.Sd7#
  • Tries
    • 1.Ka7?
      • threat
        • 2.Sa8#
      • 1...Rxb6
        • 2.Bxb6#
      • 1...Kxd8!
    • 1.Rxd7+?
      • 1...Kb8
        • 2.Rb7#
      • 1...Bxd7!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sbc4#
      • 1...Kxd6
        • 2.Sc8#
      • 1...Kxd8
        • 2.Sbc8#
      • 1...Rxd6
        • 2.Rc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • R(b);N_PINS(F)::B(C)+S(F),XP(d)
    • B(e);N_PINS(F)::B(C)+S(F),XP(d)
    • P(d);N_PINS(F)::B(C)+S(F)
  • Tries
    • Try
      • K(E);N_SPINS(F),P-FLIGHT
      • Threat
        • B(C)+S(F),DCHECK
      • Vars
        • R(b);OGATE,P_SPINR(b),XS(F)::B(C),XR(b)
      • Refutation
        • K(c);S_FLIGHT,XR(H)
    • Try
      • R(H);CHECK,XP(d)
      • Vars
        • K(c);OGATE,S_FLIGHT::R1(H)
      • Refutation
        • B(e);XR(H)
  • Actual
    • S(G);N_SPINS(F)
    • Threat
      • B(C)+S(F)
    • Vars
      • K(c);P_SPINP(d),S_FLIGHT,XS(G)::S(F)
      • K(c);S_FLIGHT,XR(H)::B(C)+S(F)
      • R(b);P_PINS(F),SBLOCK,XS(G)::R1(H)
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).