MESON Chess Problem Database

Problem Display
PID: 269151 (8/1p2N1nQ/4pp1n/1K2PPb1/R1N1k3/2p3P1/4PB2/7b w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schach, 2023

8/1p2N1nQ/4pp1n/1K2PPb1/R1N1k3/2p3P1/4PB2/7b

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sg4
      • 2.Qxh1#
    • 1...Shxf5
      • 2.Qxh1#
    • 1...Sf7
      • 2.Qxh1#
    • 1...Sg8
      • 2.Qxh1#
    • 1...fxe5
      • 2.Sb2#
      • 2.Sd2#
      • 2.Sa3#
      • 2.Se3#
      • 2.Sa5#
      • 2.Sb6#
      • 2.Sd6#
  • Tries
    • 1.Sc6?
      • threat
        • 2.Se3#
        • 2.Sb6#
      • 1...Kd5
        • 2.Sb6#
      • 1...Be3
        • 2.Sxe3#
      • 1...b6
        • 2.Se3#
        • 2.Sxb6#
      • 1...bxc6+!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Se3#
      • 1...Kd5
        • 2.Sb6#
      • 1...Kxf5
        • 2.Sd6#
      • 1...Shxf5
        • 2.Qxh1#
      • 1...Sgxf5
        • 2.Qxb7#
      • 1...Be3
        • 2.Sxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(g);OGATE::QAB(J),XB(a)
    • S(g);OGATE,P_SPINS(g),XP(H)::QAB(J),XB(a)
  • Tries
    • Try
      • S(I);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT::S(E)
        • B(d);::R(D)+S(E),XB(d)
      • Refutation
        • P(h);CHECK,XS(I)
  • Actual
    • S(I);
    • Threat
      • R(D)+S(E)
    • Vars
      • K(c);N_GUARD,S_FLIGHT::S(E)
      • K(c);N_GUARD,S_FLIGHT,XP(H)::S(E)
      • S(g);OGATE,SBLOCK,XP(H)::QAB(J),XB(a)
      • S(i);OGATE,SBLOCK,XP(H)::QAB(J),XP(h)
      • B(d);::R(D)+S(E),XB(d)
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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).