MESON Chess Problem Database

Problem Display
PID: 63643 (8/1B1pN3/4p1p1/2Rpn2R/4k1p1/2P2p2/1K2P3/2B1N3 w - - 0 1)

Stevenson, GO

Chess Amateur (The), 1909

8/1B1pN3/4p1p1/2Rpn2R/4k1p1/2P2p2/1K2P3/2B1N3

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3+
      • 2.exd3#
    • 1...Sc4+
      • 2.Rxc4#
    • 1...Sf7
      • 2.Rc4#
  • Tries
    • 1.Rxd5?
      • threat
        • 2.Rd4#
        • 2.Rdxe5#
        • 2.Rhxe5#
      • 1...Sd3+
        • 2.exd3#
      • 1...exd5
        • 2.Bxd5#
      • 1...gxh5
        • 2.Rd4#
      • 1...Sc6
        • 2.Rd4#
        • 2.Rde5#
      • 1...Sf7
        • 2.Rd4#
        • 2.Rde5#
        • 2.Rd6#
        • 2.Rxd7#
      • 1...g5
        • 2.Rd4#
      • 1...d6
        • 2.Rd4#
        • 2.Rdxe5#
      • 1...Sc4+!
  • Keys
    • 1.Sc8!
      • threat
        • 2.Sd6#
      • 1...Sd3+
        • 2.exd3#
      • 1...Sc4+
        • 2.Rxc4#
      • 1...Sf7
        • 2.Rc4#
      • 1...d6
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(e);CHECK,OGATE::P(D),XS(e)
    • S(e);CHECK,N_GUARD::R(F),XS(e)
    • S(e);N_GUARD::R(F)
  • Tries
    • Try
      • R(F);XP(d)
      • Threat
        • DUALS(3)
      • Vars
        • S(e);CHECK,OGATE::P(D),XS(e)
        • P(f);OGATE,P_SPINP(f),XR(F)::B(H),XP(f)
        • P(g);XR(G)::B(H)+R(F),DCHECK
        • P(g);::B(H)+R(F),DCHECK
      • Refutation
        • S(e);CHECK
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • S(e);CHECK,OGATE::P(D),XS(e)
      • S(e);CHECK,N_GUARD::R(F),XS(e)
      • S(e);N_GUARD::R(F)
      • P(h);::S(I),XP(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).