MESON Chess Problem Database

Problem Display
PID: 158027 (1K1n4/2pRQb2/pkp4r/N1R5/n6r/3N4/3b4/q7 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Correspondence Chess, 1958

1K1n4/2pRQb2/pkp4r/N1R5/n6r/3N4/3b4/q7

#2

6 + 11

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc5
      • 2.Qxc5#
  • Tries
    • 1.Rdd5?
      • threat
        • 2.Qxc7#
      • 1...Sxc5
        • 2.Qxc5#
      • 1...Bf4
        • 2.Sc4#
      • 1...Se6
        • 2.Rxc6#
      • 1...Qe5!
    • 1.Rd6?
      • threat
        • 2.Qxc7#
      • 1...cxd6
        • 2.Qxd8#
        • 2.Qa7#
        • 2.Qc7#
      • 1...Se6
        • 2.Rdxc6#
      • 1...Sxc5!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Qxc7#
      • 1...Sxc5
        • 2.Qxc5#
      • 1...Bf4
        • 2.Rb4#
      • 1...Se6
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(c);OGATE,XR(C)::QAB1(E),XS(c)
  • Tries
    • Try
      • R(D);
      • Threat
        • QAB1(E),XP(i)
      • Vars
        • S(c);OGATE,XR(C)::QAB1(E),XS(c)
        • B(b);S_CUTR(d)::S(B)
        • S(k);N_GUARD,S_CUTR(h)::R1(C),XP(g)
      • Refutation
        • Q(a);
    • Try
      • R(D);P_PINP(g)
      • Threat
        • QAB1(E),XP(i)
      • Vars
        • S(k);N_GUARD,S_CUTR(h)::R1(D),XP(g)
      • Refutation
        • S(c);XR(C)
  • Actual
    • R(D);
    • Threat
      • QAB1(E),XP(i)
    • Vars
      • S(c);OGATE,XR(C)::QAB1(E),XS(c)
      • B(b);N_GUARD,S_CUTR(d)::R(D)
      • S(k);S_CUTB(j)::S(B)
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).