MESON Chess Problem Database

Problem Display
PID: 16826 (6r1/3prp1p/b4B1N/6n1/3p1pQP/3n1PPp/2N2k1K/3B2R1 w - - 0 1)

Ekstrom, Sven Johan Adrian

Froberg, Johan Hilding Laurentius

Schackvarlden, 1943

6r1/3prp1p/b4B1N/6n1/3p1pQP/3n1PPp/2N2k1K/3B2R1

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf3+
      • 2.Qxf3#
    • 1...Se4
      • 2.Bxd4#
    • 1...fxg3+
      • 2.Qxg3#
  • Tries
    • 1.gxf4?
      • threat
        • 2.Qg3#
      • 1...Sxf3+
        • 2.Qxf3#
      • 1...Se4
        • 2.Bxd4#
      • 1...Se6!
  • Keys
    • 1.Qxf4!
      • threat
        • 2.Sg4#
      • 1...Sxf3+
        • 2.Qxf3#
      • 1...Se5
        • 2.Qxd4#
      • 1...Se4
        • 2.Bxd4#
      • 1...Se6
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(f);CHECK,OGATE,XP(E)::QAR1(G),XS(f)
    • S(f);S_CUTR(i)::B(I),XP(d)
    • P(e);CHECK,OGATE,XP(F)::QAB1(G),XP(e)
  • Tries
    • Try
      • P(F);XP(e)
      • Threat
        • QAB1(G)
      • Vars
        • S(f);CHECK,OGATE,XP(E)::QAR1(G),XS(f)
        • S(f);S_CUTR(i)::B(I),XP(d)
      • Refutation
        • S(f);
  • Actual
    • Q(G);XP(e)
    • Threat
      • S(J)
    • Vars
      • S(f);CHECK,OGATE,P_SPINS(f),XP(E)::QAR1(G),XS(f)
      • S(b);S_CUTR(i)::QAB(G),XP(d)
      • S(f);S_CUTR(i)::B(I),XP(d)
      • S(f);S_CUTR(i)::QAR2(G)
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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).