MESON Chess Problem Database

Problem Display
PID: 17039 (1B1nb1K1/3nrp1N/R4p2/3pPk1B/2Nr4/3p1Pb1/3Q2P1/4R3 w - - 0 1)

Froberg, Johan Hilding Laurentius

Tidskrift for Schack, 1945

1B1nb1K1/3nrp1N/R4p2/3pPk1B/2Nr4/3p1Pb1/3Q2P1/4R3

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Se3#
    • 1...Rg4+
      • 2.fxg4#
    • 1...Bf4
      • 2.g4#
    • 1...Sc5
      • 2.Rxf6#
    • 1...Sxe5
      • 2.Rxf6#
    • 1...Sxb8
      • 2.Rxf6#
    • 1...Sf8
      • 2.Rxf6#
    • 1...Se6
      • 2.Sd6#
    • 1...fxe5
      • 2.Qg5#
  • Tries
    • 1.Bg4+?
      • 1...Kg6
        • 2.Qg5#
      • 1...Rxg4+!
    • 1.Bg6+?
      • 1...Kxg6
        • 2.Qg5#
      • 1...fxg6!
    • 1.Qf4+?
      • 1...Rxf4
        • 2.Se3#
      • 1...Bxf4
        • 2.g4#
      • 1...Kxf4!
  • Keys
    • 1.exf6!
      • threat
        • 2.Qg5#
      • 1...Rg4+
        • 2.fxg4#
      • 1...Sxf6+
        • 2.Rxf6#
      • 1...Rf4
        • 2.Sd6#
      • 1...Re3
        • 2.Sxe3#
      • 1...Bf4
        • 2.g4#
      • 1...Bh4
        • 2.Sd6#
      • 1...Se6
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(c);SBLOCK::S(E)
    • R(c);CHECK,OGATE::P(D),XR(c)
    • B(b);OGATE::P(C)
    • S(g);N_GUARD::R1(H),XP(f)
    • S(g);N_GUARD,XP(F)::R1(H),XP(f)
    • S(g);N_GUARD,XB(J)::R1(H),XP(f)
    • S(j);SBLOCK::S(E)
    • P(f);N_GUARD,XP(F)::QAR1(B)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • K(e);P_SPINP(f),S_FLIGHT::QAR1(B)
      • Refutation
        • R(c);CHECK,XB(G)
    • Try
      • B(G);CHECK
      • Vars
        • K(e);P_SPINP(f),S_FLIGHT,XB(G)::QAR1(B)
      • Refutation
        • P(i);XB(G)
    • Try
      • Q(B);CHECK
      • Vars
        • R(c);SBLOCK,XQ(B)::S(E)
        • B(b);OGATE,SBLOCK,XQ(B)::P(C)
      • Refutation
        • K(e);P-FLIGHT,XQ(B)
  • Actual
    • P(F);XP(f)
    • Threat
      • QAR1(B)
    • Vars
      • R(c);CHECK,OGATE::P(D),XR(c)
      • S(g);CHECK,OGATE,XP(F)::R1(H),XS(g)
      • R(c);S_CUTB(b)::S(E)
      • R(h);N_GUARD::S(E),XR(h)
      • B(b);OGATE::P(C)
      • B(b);N_GUARD::S(E)
      • S(j);S_CUTR(h)::S(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).