MESON Chess Problem Database

Problem Display
PID: 162545 (2Qn4/2p4r/K1k5/R2N2b1/nPpBN3/1p6/7q/3R4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Sakkelet, 1995

2Qn4/2p4r/K1k5/R2N2b1/nPpBN3/1p6/7q/3R4

#2

8 + 9

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Rc5#
    • 1...Sc3
      • 2.Rc5#
    • 1...Sc5+
      • 2.Rxc5#
    • 1...Sb6
      • 2.Rc5#
    • 1...Sf7
      • 2.Qe8#
  • Tries
    • 1.Sdc3?
      • threat
        • 2.b5#
      • 1...Sc5+
        • 2.Rxc5#
      • 1...Sxc3
        • 2.Rc5#
      • 1...Qe5!
    • 1.Sb6?
      • threat
        • 2.b5#
      • 1...Sc5+
        • 2.Rxc5#
      • 1...Sxb6
        • 2.Rc5#
      • 1...Sc3
        • 2.Rc5#
      • 1...Qe5!
    • 1.Bf2?
      • threat
        • 2.b5#
      • 1...Sc5+
        • 2.Rxc5#
      • 1...Sc3
        • 2.Rc5#
      • 1...Bd2!
    • 1.Be3?
      • threat
        • 2.b5#
      • 1...Sc5+
        • 2.Rxc5#
      • 1...Sc3
        • 2.Rc5#
      • 1...Qd2!
    • 1.Qe6+?
      • 1...Qd6
        • 2.b5#
      • 1...Sxe6!
  • Keys
    • 1.Bg7!
      • threat
        • 2.b5#
      • 1...Sc5+
        • 2.Rxc5#
      • 1...Qd2
        • 2.Qxc7#
      • 1...Bd2
        • 2.Se7#
      • 1...Sc3
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(c);N_GUARD::R1(E)
    • S(c);CHECK,N_GUARD::R1(E),XS(c)
    • S(i);OGATE::QAB(H)
  • Tries
    • Try
      • S(F);
      • Threat
        • P(B)
      • Vars
        • S(c);CHECK,N_GUARD::R1(E),XS(c)
        • S(c);N_GUARD,XS(F)::R1(E)
      • Refutation
        • Q(a);
    • Try
      • S(F);
      • Threat
        • P(B)
      • Vars
        • S(c);CHECK,N_GUARD::R1(E),XS(c)
        • S(c);N_GUARD,XS(F)::R1(E)
        • S(c);N_GUARD::R1(E)
      • Refutation
        • Q(a);
    • Try
      • B(C);
      • Threat
        • P(B)
      • Vars
        • S(c);CHECK,N_GUARD::R1(E),XS(c)
        • S(c);N_GUARD::R1(E)
      • Refutation
        • B(e);
    • Try
      • B(C);
      • Threat
        • P(B)
      • Vars
        • S(c);CHECK,N_GUARD::R1(E),XS(c)
        • S(c);N_GUARD::R1(E)
      • Refutation
        • Q(a);
    • Try
      • Q(H);CHECK,N_PINP(g)
      • Vars
        • Q(a);P_SPINQ(a)::P(B)
      • Refutation
        • S(i);XQ(H)
  • Actual
    • B(C);
    • Threat
      • P(B)
    • Vars
      • S(c);CHECK,N_GUARD::R1(E),XS(c)
      • Q(a);N_GUARD::QAR1(H),XP(g)
      • B(e);N_GUARD::S(F)
      • S(c);N_GUARD::R1(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).