MESON Chess Problem Database

Problem Display
PID: 82038 (8/1KbpQ2b/5pB1/2pknq1R/2p4R/5p2/1B3N2/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Problemisten, 1948

8/1KbpQ2b/5pB1/2pknq1R/2p4R/5p2/1B3N2/8

#2

7 + 10

6490 yacpdb 2009
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Bf7#
    • 1...Qc2
      • 2.Bf7#
    • 1...Qd3
      • 2.Bf7#
    • 1...Qe4
      • 2.Bf7#
    • 1...Qf4
      • 2.Bf7#
    • 1...Sd3
      • 2.Bf7#
    • 1...Sg4
      • 2.Bf7#
    • 1...Sc6
      • 2.Bf7#
    • 1...Sf7
      • 2.Bxf7#
  • Tries
    • 1.Kxc7?
      • threat
        • 2.Qd6#
      • 1...Sf7
        • 2.Bxf7#
        • 2.Qe4#
        • 2.Qxf7#
      • 1...d6
        • 2.Qxd6#
      • 1...Qe6!
    • 1.Sd1?
      • threat
        • 2.Sc3#
        • 2.Se3#
      • 1...Qc2
        • 2.Se3#
        • 2.Bf7#
      • 1...Qd3
        • 2.Bf7#
      • 1...Qe4
        • 2.Bf7#
      • 1...Qg4
        • 2.Se3#
      • 1...Qg5
        • 2.Sc3#
      • 1...Ba5
        • 2.Se3#
      • 1...Sg4
        • 2.Bf7#
      • 1...c3
        • 2.Sxc3#
        • 2.Se3#
      • 1...Qf4!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sc3#
      • 1...Qxe4
        • 2.Bf7#
      • 1...c3
        • 2.Sxc3#
      • 1...Qg4
        • 2.Sxf6#
      • 1...Qf4
        • 2.Qf7#
      • 1...Ba5
        • 2.Qd6#
      • 1...Sg4
        • 2.Bf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(f);N_GUARD,P_PINB(A),P_SPINS(e)::B(E)
    • Q(f);N_GUARD,P_SPINS(e)::B(E)
    • S(e);N_GUARD,P_SPINQ(f)::B(E)
    • S(e);N_GUARD,P_SPINQ(f)::B(E),XS(e)
  • Tries
    • Try
      • K(F);P-FLIGHT,XB(h)
      • Threat
        • QAR1(G)
      • Vars
        • P(i);::QAR1(G),XP(i)
      • Refutation
        • Q(f);P_SPINS(e)
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);N_GUARD,P_SPINS(e)::B(E)
        • Q(f);P_SPINS(e)::S(B)
        • Q(f);::S(B)
        • B(h);::S(B)
        • S(e);N_GUARD,P_SPINQ(f)::B(E)
      • Refutation
        • Q(f);P_SPINS(e)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • Q(f);N_GUARD,P_SPINS(e),XS(B)::B(E)
      • P(b);::S(B),XP(b)
      • Q(f);N_GUARD,P_SPINS(e)::S(B),XP(g)
      • Q(f);N_GUARD,P_SPINS(e)::QAB(G)
      • B(h);N_GUARD::QAR1(G)
      • S(e);N_GUARD,P_SPINQ(f)::B(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).