MESON Chess Problem Database

Problem Display
PID: 121032 (1Q3q2/5p1B/2p3n1/bNp1PP1R/2P1kP2/3n3N/3PP3/K5B1 w - - 0 1)

Eriksson, Finn Olof

Helsingfors SK JT, 1936

1Q3q2/5p1B/2p3n1/bNp1PP1R/2P1kP2/3n3N/3PP3/K5B1

#2

13 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Sxd6#
    • 1...Qh6
      • 2.Sd6#
    • 1...Qg7
      • 2.Sd6#
    • 1...Qc8
      • 2.Sd6#
    • 1...Qe8
      • 2.Sd6#
    • 1...Qg8
      • 2.Sd6#
    • 1...Qh8
      • 2.Sd6#
    • 1...Bc3+
      • 2.Sxc3#
    • 1...Bb6
      • 2.Sc3#
    • 1...Bc7
      • 2.Sc3#
    • 1...Bd8
      • 2.Sc3#
    • 1...Sb4
      • 2.Sc3#
    • 1...Sdxf4
      • 2.Sf2#
    • 1...Sgxf4
      • 2.Sg5#
    • 1...Se7
      • 2.Sd6#
    • 1...cxb5
      • 2.Qb7#
  • Tries
    • 1.Sf2+?
      • 1...Kxf4
        • 2.Bh2#
      • 1...Sxf2!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qxc6#
      • 1...Bc3+
        • 2.Sxc3#
      • 1...Qxe8
        • 2.Sd6#
      • 1...Sdxf4
        • 2.Sf2#
      • 1...Sdxe5
        • 2.d3#
      • 1...Sgxf4
        • 2.Sg5#
      • 1...Sgxe5
        • 2.f6#
      • 1...cxb5
        • 2.Qc6#
      • 1...Qd6
        • 2.Sxd6#
      • 1...Sb4
        • 2.Sc3#
      • 1...Se7
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(h);N_GUARD::S(H),XQ(h)
    • Q(h);N_GUARD::S(H)
    • Q(h);N_GUARD,P_PINP(I)::S(H)
    • B(c);CHECK,N_GUARD::S(H),XB(c)
    • B(c);N_GUARD::S(H)
    • S(a);S_CUTB(c)::S(H)
    • S(a);N_GUARD,SBLOCK,XP(G)::S(E)
    • S(f);SBLOCK,XP(G)::S(E)
    • S(f);S_CUTQ(h)::S(H)
    • P(e);OGATEB,XS(H)::QAB(M)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT,XP(G)::B(B)
      • Refutation
        • S(a);XS(E)
  • Actual
    • Q(M);
    • Threat
      • QAB(M),XP(e)
    • Vars
      • B(c);CHECK,N_GUARD::S(H),XB(c)
      • Q(h);N_GUARD,XQ(M)::S(H)
      • S(a);N_GUARD,SBLOCK,XP(G)::S(E)
      • S(a);OGATE,P_SPINS(a),XP(I)::P(C)
      • S(f);SBLOCK,XP(G)::S(E)
      • S(f);P_SPINS(f),XP(I)::B(L)+P(J)
      • P(e);XS(H)::QAB(M)
      • Q(h);N_GUARD::S(H),XQ(h)
      • S(a);S_CUTB(c)::S(H)
      • S(f);S_CUTQ(h)::S(H)
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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).