MESON Chess Problem Database

Problem Display
PID: 84450 (4b2b/3pP3/2Np1kpB/3Q4/3NP1p1/6P1/p7/K7 w - - 0 1)

Funk, Henry E

Good Companions, 1921

4b2b/3pP3/2Np1kpB/3Q4/3NP1p1/6P1/p7/K7

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf7
      • 2.Qg5#
    • 1...Bg7
      • 2.Bg5#
    • 1...g5
      • 2.Qf5#
    • 1...dxc6
      • 2.Qe6#
  • Tries
    • 1.Kxa2?
      • 1...dxc6
        • 2.Qe6#
      • 1...g5
        • 2.Qf5#
      • 1...Bg7
        • 2.Bg5#
      • 1...Bf7!
    • 1.Sd8?
      • threat
        • 2.Qg5#
        • 2.Qxd6#
      • 1...g5
        • 2.Qxg5#
        • 2.Qxd6#
      • 1...Bf7
        • 2.Qg5#
      • 1...Kxe7!
    • 1.Qxa2?
      • threat
        • 2.Qf2#
      • 1...dxc6
        • 2.Qe6#
      • 1...g5!
    • 1.Qc4?
      • threat
        • 2.Qf1#
      • 1...dxc6
        • 2.Qe6#
      • 1...g5!
  • Keys
    • 1.Qg8!
      • 1...dxc6
        • 2.Qe6#
      • 1...Bf7
        • 2.Qxh8#
      • 1...Bg7
        • 2.Qxg7#
      • 1...d5
        • 2.e5#
      • 1...g5
        • 2.Bxg5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(g);SBLOCK::QAB1(E)
    • B(h);SBLOCK::B(G)
    • P(e);N_GUARD::QAR1(E)
    • P(f);N_GUARD,XS(F)::QAR1(E)
  • Tries
    • Try
      • K(A);P-FLIGHT,XP(a)
      • Vars
        • P(f);N_GUARD,XS(F)::QAR1(E)
        • P(e);N_GUARD::QAR1(E)
        • B(h);SBLOCK::B(G)
      • Refutation
        • B(g);P_PINQ(E)
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(g);::QAB1(E)
      • Refutation
        • K(d);P_PINS(C),S_FLIGHT,XP(H)
    • Try
      • Q(E);XP(a)
      • Threat
        • QAR(E)
      • Vars
        • P(f);N_GUARD,XS(F)::QAR1(E)
      • Refutation
        • P(e);
    • Try
      • Q(E);
      • Threat
        • QAR(E)
      • Vars
        • P(f);N_GUARD,XS(F)::QAR1(E)
      • Refutation
        • P(e);
  • Actual
    • Q(E);
    • Vars
      • P(f);N_GUARD,XS(F)::QAR1(E)
      • B(g);SBLOCK::QAB(E),XB(h)
      • B(h);N_GUARD::QAB1(E),XB(h)
      • P(c);N_GUARD::P(D)
      • P(e);::B(G),XP(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).