MESON Chess Problem Database

Problem Display
PID: 143965 (3Q4/3p4/3NpPpp/2K1k1q1/5n1p/3p1p1P/2PP1N2/8 w - - 0 1)

Westberg, CE

Tidskrift for Schack, 1909

3Q4/3p4/3NpPpp/2K1k1q1/5n1p/3p1p1P/2PP1N2/8

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf6
      • 2.Sg4#
    • 1...Qg4
      • 2.Sxg4#
    • 1...Qf5
      • 2.Sc4#
      • 2.Sf7#
    • 1...Se2
      • 2.Sxd3#
    • 1...Sg2
      • 2.Sxd3#
    • 1...Sxh3
      • 2.Sxd3#
    • 1...Sd5
      • 2.Sxd3#
    • 1...Sh5
      • 2.Sxd3#
    • 1...dxc2
      • 2.d4#
  • Tries
    • 1.Qh8?
      • 1...Qxf6
        • 2.Sg4#
      • 1...Sxh3
        • 2.Sxd3#
      • 1...dxc2
        • 2.d4#
      • 1...Se2
        • 2.Sxd3#
      • 1...Sg2
        • 2.Sxd3#
      • 1...Sd5
        • 2.Sxd3#
      • 1...Sh5
        • 2.Sxd3#
      • 1...Qg1
        • 2.f7#
      • 1...Qg2
        • 2.f7#
      • 1...Qg3
        • 2.f7#
      • 1...Qg4
        • 2.Sxg4#
        • 2.f7#
      • 1...Qf5
        • 2.Sc4#
        • 2.Sf7#
      • 1...Qh5
        • 2.f7#
      • 1...h5!
  • Keys
    • 1.f7!
      • 1...Qxd8
        • 2.Sg4#
      • 1...Sxh3
        • 2.Sxd3#
      • 1...dxc2
        • 2.d4#
      • 1...Qe7
        • 2.Sg4#
      • 1...Se2
        • 2.Sxd3#
      • 1...Sg2
        • 2.Sxd3#
      • 1...Sd5
        • 2.Sxd3#
      • 1...Sh5
        • 2.Sxd3#
      • 1...Qg1
        • 2.Qh8#
      • 1...Qf6
        • 2.Sg4#
      • 1...Qg2
        • 2.Qh8#
      • 1...Qg3
        • 2.Qh8#
      • 1...Qg4
        • 2.Sxg4#
        • 2.Qh8#
      • 1...Qf5
        • 2.Sc4#
      • 1...Qh5
        • 2.Qh8#
      • 1...h5
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • Q(f);N_GUARD,XP(G)::S(C)
    • Q(f);N_GUARD::S(C),XQ(f)
    • S(c);N_GUARD::S(C),XP(a)
    • S(c);N_GUARD,XP(D)::S(C),XP(a)
    • P(a);OGATE,XP(A)::P(B)
  • Tries
    • Try
      • Q(H);
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f),XP(G)::S(C)
        • S(c);N_GUARD,XP(D)::S(C),XP(a)
        • P(a);OGATE,XP(A)::P(B)
        • S(c);N_GUARD::S(C),XP(a)
        • Q(f);N_GUARD,P_PINS(C)::QAB(H)+P(G)
        • Q(f);N_GUARD::QAB(H)+P(G)
      • Refutation
        • P(i);
  • Actual
    • P(G);
    • Vars
      • Q(f);N_GUARD,XQ(H)::S(C)
      • S(c);N_GUARD,XP(D)::S(C),XP(a)
      • P(a);OGATE,XP(A)::P(B)
      • Q(f);N_GUARD,P_PINS(F)::S(C)
      • S(c);N_GUARD::S(C),XP(a)
      • Q(f);N_GUARD,P_PINS(C)::QAB(H)
      • Q(f);N_GUARD::S(C)
      • Q(f);N_GUARD::QAB(H)
      • Q(f);SBLOCK::S(F)
      • P(i);N_GUARD::QAR2(H),XQ(f)
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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).