MESON Chess Problem Database

Problem Display
PID: 266504 (1b1R4/3b2r1/4QBB1/2N1Pn2/1P1k3p/7K/3P4/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schweizerische Schachzeitung, 2020

1b1R4/3b2r1/4QBB1/2N1Pn2/1P1k3p/7K/3P4/8

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe5
      • 2.Bxe5#
    • 1...Bd6
      • 2.exd6#
    • 1...Se3
      • 2.Sb3#
    • 1...Sg3
      • 2.Sb3#
    • 1...Sd6
      • 2.Sb3#
      • 2.exd6#
    • 1...Sh6
      • 2.Sb3#
    • 1...Se7
      • 2.Sb3#
  • Tries
    • 1.Rxd7+?
      • 1...Bd6
        • 2.exd6#
      • 1...Sd6
        • 2.Sb3#
        • 2.exd6#
      • 1...Rxd7!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qd3#
      • 1...Se3+
        • 2.Se6#
      • 1...Sg3+
        • 2.Se6#
      • 1...Sd6+
        • 2.e6#
      • 1...Sh6+
        • 2.Se6#
      • 1...Se7+
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • B(f);N_SPINB(d),OGATE,P_SPINB(f),XP(E)::B(G),XB(f)
    • B(f);N_SPINB(d),OGATE::B(G)+P(E),XB(f)
    • S(c);P_PINQ(F)::S(D)
  • Tries
    • Try
      • R(I);CHECK,XB(d)
      • Vars
        • B(f);OGATE,P_SPINB(f)::B(G)+P(E),XB(f)
      • Refutation
        • R(e);XR(I)
  • Actual
    • Q(F);
    • Threat
      • QAR1(F)
    • Vars
      • S(c);CHECK::S(D)
      • S(c);CHECK,N_SPINB(d),S_CUTB(f)::B(G)+P(E)
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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).