MESON Chess Problem Database

Problem Display
PID: 9857 (3R1b2/q1p5/N1pPN1R1/3k4/2r2p2/1P3P1K/1B6/8 w - - 0 1)

Gooderson, Arthur R

Correspondence Chess, 1960

3R1b2/q1p5/N1pPN1R1/3k4/2r2p2/1P3P1K/1B6/8

#2

9 + 7

3207 A R Gooderson An English Progressive 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Saxc7#
      • 2.Sexc7#
    • 1...Qf2
      • 2.Saxc7#
      • 2.Sexc7#
    • 1...Qe3
      • 2.Saxc7#
      • 2.Sexc7#
    • 1...Qc5
      • 2.Saxc7#
      • 2.Sexc7#
    • 1...Qa8
      • 2.Saxc7#
      • 2.Sexc7#
    • 1...Rc1
      • 2.Sb4#
      • 2.Sxf4#
    • 1...Rc2
      • 2.Sb4#
      • 2.Sxf4#
    • 1...Rb4
      • 2.Sxb4#
    • 1...Rc5
      • 2.Sb4#
      • 2.Sxf4#
    • 1...Bh6
      • 2.dxc7#
    • 1...Be7
      • 2.dxe7#
    • 1...Bg7
      • 2.dxc7#
  • Tries
    • 1.Sec5?
      • threat
        • 2.Rg5#
      • 1...Qxc5
        • 2.Sxc7#
      • 1...Rxc5
        • 2.Sb4#
      • 1...Re4
        • 2.fxe4#
      • 1...Bh6
        • 2.dxc7#
      • 1...Be7
        • 2.dxe7#
      • 1...Bg7
        • 2.dxc7#
      • 1...Rc3!
  • Keys
    • 1.Sac5!
      • threat
        • 2.Rg5#
      • 1...Qxc5
        • 2.Sxc7#
      • 1...Rxc5
        • 2.Sxf4#
      • 1...Re4
        • 2.fxe4#
      • 1...Bh6
        • 2.dxc7#
      • 1...Be7
        • 2.dxe7#
      • 1...Bg7
        • 2.dxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD::S(E),XR(a)
    • B(g);N_GUARD::R(I)+P(F),XP(f)
    • B(g);OGATE::R(I)+P(F),XB(g)
  • Tries
    • Try
      • S(G);
      • Threat
        • R(H)
      • Vars
        • Q(e);N_GUARD,SBLOCK,XS(G)::S(E),XP(f)
        • R(a);N_GUARD,SBLOCK,XS(G)::S(E)
        • R(a);OGATE::P(C),XR(a)
        • B(g);N_GUARD::R(I)+P(F),XP(f)
        • B(g);OGATE::R(I)+P(F),XB(g)
      • Refutation
        • R(a);P_PINP(C)
  • Actual
    • S(E);
    • Threat
      • R(H)
    • Vars
      • Q(e);N_GUARD,SBLOCK,XS(E)::S(G),XP(f)
      • R(a);N_GUARD,SBLOCK,XS(E)::S(G),XP(b)
      • R(a);OGATE::P(C),XR(a)
      • B(g);N_GUARD::R(I)+P(F),XP(f)
      • B(g);OGATE::R(I)+P(F),XB(g)
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).