MESON Chess Problem Database

Problem Display
PID: 165343 (4k3/R3P2R/4N3/1bp1n3/4n3/Q7/8/K7 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Upsala Allmana Schacksallskap, 1935

4k3/R3P2R/4N3/1bp1n3/4n3/Q7/8/K7

#2

6 + 5

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bd7
      • 2.Sc7#
    • 1...Sd7
      • 2.Sc7#
    • 1...Sf7
      • 2.Sg7#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Sg7#
      • 1...Bc4
        • 2.Qb8#
      • 1...Bd7
        • 2.Sc7#
      • 1...Sc4
        • 2.Qxb5#
      • 1...Sd7
        • 2.Sc7#
      • 1...c4!
    • 1.Qf3?
      • threat
        • 2.Sg7#
        • 2.Rh8#
        • 2.Qf8#
      • 1...Bd7
        • 2.Sc7#
        • 2.Qf8#
      • 1...Sf6
        • 2.Qa8#
      • 1...Sg6
        • 2.Sg7#
        • 2.Qf7#
      • 1...Sd7
        • 2.Sc7#
        • 2.Qh5#
        • 2.Qf7#
      • 1...Sf7
        • 2.Sg7#
        • 2.Qxf7#
      • 1...Sxf3!
    • 1.Qa5?
      • threat
        • 2.Qd8#
      • 1...Sf7
        • 2.Sg7#
        • 2.Qxb5#
      • 1...Sc6!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Sc7#
      • 1...Sg4
        • 2.Qh5#
      • 1...Sf7
        • 2.Sg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • B(b);SBLOCK::S(C)
    • S(d);SBLOCK::S(C)
  • Tries
    • Try
      • Q(B);
      • Threat
        • S(C)
      • Vars
        • B(b);OGATE::QAR(B)
        • B(b);SBLOCK::S(C)
        • S(d);N_GUARD::QAB(B),XB(b)
        • S(d);SBLOCK::S(C)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • S(a);OGATE::QAR(B)
      • Refutation
        • S(d);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Refutation
        • S(d);
  • Actual
    • Q(B);
    • Threat
      • S(C)
    • Vars
      • S(d);N_GUARD::QAB(B)
      • S(d);SBLOCK::S(C)
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).