MESON Chess Problem Database

Problem Display
PID: 180054 (2br1b2/KNQ2qn1/3BpR1p/2p4r/2P1k1P1/3p1N2/5P2/1B6 w - - 0 1)

Ellerman, Arnoldo

Bulletin Ouvrier des Echecs, 1952

2br1b2/KNQ2qn1/3BpR1p/2p4r/2P1k1P1/3p1N2/5P2/1B6

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qg6
      • 2.Rf4#
    • 1...Qe8
      • 2.Rf4#
    • 1...Qg8
      • 2.Rf4#
    • 1...Qxc7
      • 2.Rf4#
    • 1...Qd7
      • 2.Rf4#
    • 1...Qe7
      • 2.Rf4#
    • 1...Rh1
      • 2.Sxc5#
      • 2.Qc6#
    • 1...Rh2
      • 2.Sxc5#
      • 2.Qc6#
    • 1...Rh3
      • 2.Sxc5#
      • 2.Qc6#
    • 1...Rh4
      • 2.Sxc5#
      • 2.Qc6#
    • 1...Sf5
      • 2.Qc6#
    • 1...e5
      • 2.Sxc5#
  • Keys
    • 1.Be5!
      • threat
        • 2.Sd2#
      • 1...Qxc7
        • 2.Rf4#
      • 1...Rxe5
        • 2.Qxe5#
      • 1...Rd6
        • 2.Sxc5#
      • 1...Bd6
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(g);N_GUARD::R1(G)
    • Q(g);N_GUARD,P_PINS(I),XQ(J)::R1(G)
    • S(h);S_CUTR(d)::QAB(J)
    • P(e);S_CUTR(d)::S(I),XP(c)
  • Actual
    • B(F);
    • Threat
      • S(C)
    • Vars
      • Q(g);N_GUARD,P_PINS(I),XQ(J)::R1(G)
      • R(d);OGATE,XB(F)::QAR1(J),XR(d)
      • R(j);S_CUTB(k)::S(I),XP(c)
      • B(k);S_CUTR(j)::QAB(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).