MESON Chess Problem Database

Problem Display
PID: 17690 (5b2/1N6/1Np2p2/2Qn4/1r2kBP1/R2pPR2/b2n2K1/2rB4 w - - 0 1)

Jorgensen, Walther Martinus Johannes

1st Prize, Skakbladet, 1948

5b2/1N6/1Np2p2/2Qn4/1r2kBP1/R2pPR2/b2n2K1/2rB4

#2

10 + 10

3105 FIDE Album (1945-1955) 1964
15593 170 Skakopgaver (Jorgensen) 1975
133 The Problemist Supplement 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Qd4#
    • 1...Rb2
      • 2.Qd4#
    • 1...Rb3
      • 2.Qd4#
    • 1...Rd4
      • 2.Qxd4#
    • 1...Rb5
      • 2.Qd4#
    • 1...Rxb6
      • 2.Qd4#
    • 1...Bc4
      • 2.Qd4#
    • 1...Bd6
      • 2.Sxd6#
    • 1...Bh6
      • 2.Sd6#
    • 1...Bg7
      • 2.Sd6#
    • 1...Sxf3
      • 2.Bxf3#
    • 1...Sc4
      • 2.Qd4#
    • 1...Sc3
      • 2.Qf5#
    • 1...Sxe3+
      • 2.Qxe3#
    • 1...Sxf4+
      • 2.Rxf4#
    • 1...Sxb6
      • 2.Qf5#
    • 1...Sc7
      • 2.Qf5#
    • 1...Se7
      • 2.Sd6#
  • Tries
    • 1.Qe7+?
      • 1...Sxe7
        • 2.Sd6#
      • 1...Bxe7!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qe6#
      • 1...Sxe3+
        • 2.Rxe3#
      • 1...Sxf4+
        • 2.Qxf4#
      • 1...Bxd6
        • 2.Sxd6#
      • 1...Sxf3
        • 2.Bxf3#
      • 1...Sxb6
        • 2.Qxd3#
      • 1...Sc4
        • 2.Sc5#
      • 1...Sc3
        • 2.Sc5#
      • 1...Sc7
        • 2.Qxd3#
      • 1...Se7
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 7
    • ADDED MATES = 0
    • REMOVED MATES = 9
  • Sets
    • R(e);N_GUARD::QAR1(H)
    • R(e);N_GUARD::QAR1(H),XR(e)
    • R(e);N_GUARD,XS(I)::QAR1(H)
    • B(b);S_CUTR(e)::QAR1(H)
    • B(j);N_GUARD::S(J),XB(j)
    • B(j);N_GUARD::S(J)
    • S(c);OGATE,XR(E)::B(A),XS(c)
    • S(c);S_CUTR(e)::QAR1(H)
    • S(g);OGATE::QAB1(H)
    • S(g);CHECK,OGATE,XP(D)::QAR1(H),XS(g)
    • S(g);CHECK,OGATE,XB(F)::R1(E),XS(g)
    • S(g);OGATE,XS(I)::QAB1(H)
    • S(g);S_CUTB(j)::S(J)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • S(g);XQ(H)::S(J)
      • Refutation
        • B(j);XQ(H)
  • Actual
    • Q(H);
    • Threat
      • QAR2(H)
    • Vars
      • S(g);CHECK,OGATE,XP(D)::R1(E),XS(g)
      • S(g);CHECK,OGATE,XB(F)::QAR1(H),XS(g)
      • B(j);XQ(H)::S(J),XB(j)
      • S(c);OGATE,XR(E)::B(A),XS(c)
      • S(g);OGATE,XS(I)::QAB1(H),XP(d)
      • S(c);S_CUTR(a)::S(J)
      • S(g);S_CUTR(a)::S(J)
      • S(g);OGATE::QAB1(H),XP(d)
HTML5 logo

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).