MESON Chess Problem Database

Problem Display
PID: 152561 (2Rn4/4Bb2/1n4rb/Nr2N2R/3k1p2/2p2P2/B1p1P3/2Q4K w - - 0 1)

Jorgensen, Walther Martinus Johannes

4th HM., Magasinet, 1942

2Rn4/4Bb2/1n4rb/Nr2N2R/3k1p2/2p2P2/B1p1P3/2Q4K

#2

10 + 10

15593 170 Skakopgaver (Jorgensen) 1975
56 The Problemist 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Bc5#
    • 1...Rb2
      • 2.Bc5#
    • 1...Rb4
      • 2.Bc5#
    • 1...Rc5
      • 2.Bxc5#
    • 1...Rd5
      • 2.Sb3#
    • 1...Rg1+
      • 2.Qxg1#
    • 1...Rg5
      • 2.Qxf4#
    • 1...Rc6
      • 2.Qg1#
    • 1...Rd6
      • 2.Qg1#
    • 1...Re6
      • 2.Qg1#
    • 1...Rf6
      • 2.Qg1#
    • 1...Bg7
      • 2.Qxf4#
    • 1...Bf8
      • 2.Qxf4#
    • 1...Sd5
      • 2.Rc4#
    • 1...Se6
      • 2.Sac6#
      • 2.Sec6#
  • Tries
    • 1.Sac6+?
      • 1...Rxc6
        • 2.Qg1#
      • 1...Sxc6!
    • 1.Sec6+?
      • 1...Rxc6
        • 2.Qg1#
      • 1...Sxc6!
  • Keys
    • 1.Bf6!
      • threat
        • 2.Sec6#
      • 1...Rg1+
        • 2.Qxg1#
      • 1...Rxe5
        • 2.Bxe5#
      • 1...Rxf6
        • 2.Qg1#
      • 1...Sc6
        • 2.Sexc6#
      • 1...Rd5
        • 2.Sb3#
      • 1...Rg5
        • 2.Qxf4#
      • 1...Bg5
        • 2.Qg1#
      • 1...Bd5
        • 2.Sxg6#
      • 1...Sd5
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • R(e);N_GUARD,P_PINQ(A)::B(I)
    • R(e);N_GUARD::B(I)
    • R(e);N_GUARD::B(I),XR(e)
    • R(e);N_GUARD,SBLOCK,S_CUTB(i)::S(F)
    • R(g);CHECK,N_GUARD::QAB(A),XR(g)
    • R(g);S_CUTB(h)::QAR2(A),XP(d)
    • R(g);N_GUARD::QAB(A)
    • B(h);N_GUARD::QAR2(A),XP(d)
    • S(f);N_GUARD,SBLOCK,S_CUTB(i)::R1(J)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • R(g);XS(F)::QAB(A)
      • Refutation
        • S(j);XS(F)
    • Try
      • S(G);CHECK
      • Vars
        • R(g);XS(G)::QAB(A)
      • Refutation
        • S(j);XS(G)
  • Actual
    • B(I);
    • Threat
      • B(I)+S(G),DCHECK
    • Vars
      • R(g);CHECK,N_GUARD::QAB(A),XR(g)
      • R(e);OGATE,P_SPINR(e),XS(G)::B(I),XR(e)
      • R(g);N_GUARD,XB(I)::QAB(A)
      • S(j);::B(I)+S(G),DCHECK,XS(j)
      • R(e);N_GUARD,SBLOCK,S_CUTB(i)::S(F)
      • R(g);S_CUTB(h)::QAR2(A),XP(d)
      • B(h);S_CUTR(g)::QAB(A)
      • B(i);P_PINP(E),S_CUTR(e)::B(I)+S(G),XR(g)
      • S(f);N_GUARD,SBLOCK,S_CUTB(i)::R1(J)
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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).