MESON Chess Problem Database

Problem Display
PID: 180969 (8/Q1B5/3q2R1/4Pp2/n4k2/8/p7/K2n3B w - - 0 1)

Preiswerk, Walther Edouard

Schweizerische Schachzeitung, 1908

8/Q1B5/3q2R1/4Pp2/n4k2/8/p7/K2n3B

#2

6 + 6

16108 Walther Preiswerks Shachprobleme (M. Henneberger) 1949

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Bxd6#
    • 1...Qa3
      • 2.Qd4#
    • 1...Qxe5+
      • 2.Qd4#
    • 1...Qxc7
      • 2.Qd4#
    • 1...Qe7
      • 2.Qd4#
    • 1...Qf8
      • 2.Qd4#
    • 1...Qd4+
      • 2.Qxd4#
    • 1...Qa6
      • 2.Qd4#
    • 1...Qe6
      • 2.Qd4#
    • 1...Qf6
      • 2.Qd4#
      • 2.exf6#
  • Tries
    • 1.Qf2+?
      • 1...Kxe5
        • 2.Bxd6#
      • 1...Sxf2!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qg3#
      • 1...Qxe5+
        • 2.Qd4#
      • 1...Qd4+
        • 2.Qxd4#
      • 1...Kxe5
        • 2.Bxd6#
      • 1...Qxg6
        • 2.e6#
      • 1...Qa3
        • 2.Qd4#
        • 2.Qg5#
      • 1...Qd3
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • K(d);OGATEB,P_SPINQ(f),S_FLIGHT,XP(C)::B(F),XQ(f)
    • Q(f);N_GUARD::QAR2(E)
    • Q(f);CHECK,N_GUARD,P_SPINQ(f),XP(C)::QAR2(E)
    • Q(f);N_GUARD,XB(F)::QAR2(E)
    • Q(f);CHECK,N_GUARD::QAR2(E),XQ(f)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);P_SPINQ(f),S_FLIGHT,XP(C)::B(F),XQ(f)
      • Refutation
        • S(a);XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • Q(f);CHECK,N_GUARD,P_SPINQ(f),XP(C)::QAR2(E)
      • Q(f);CHECK,N_GUARD::QAR2(E),XQ(f)
      • K(d);OGATEB,P_SPINQ(f),S_FLIGHT,XP(C)::B(F),XQ(f)
      • Q(f);XR(D)::B(F)+P(C)
      • Q(f);::QAB1(E)
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).