MESON Chess Problem Database

Problem Display
PID: 157378 (b5RB/2Qn4/4p2r/R3qkN1/8/1p2prbP/4NP2/3K4 w - - 0 1)

Ellerman, Arnoldo

Densmore MT (Pittsburgh Gazette-Times), 1918

b5RB/2Qn4/4p2r/R3qkN1/8/1p2prbP/4NP2/3K4

#2

9 + 10

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa5
      • 2.Sd4#
    • 1...Qb5
      • 2.Sd4#
    • 1...Qc5
      • 2.Sd4#
    • 1...Qd5+
      • 2.Sd4#
    • 1...Rf4
      • 2.Sxg3#
    • 1...Bf4
      • 2.Sd4#
  • Tries
    • 1.Qc2+?
      • 1...Be4
        • 2.Qxe4#
      • 1...bxc2+!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qg4#
      • 1...Qd5+
        • 2.Qd3#
      • 1...Rxh3
        • 2.Qxe6#
      • 1...Rxh8
        • 2.Qxe6#
      • 1...Rf4
        • 2.Sxg3#
      • 1...Rh4
        • 2.Qxe6#
      • 1...Bf4
        • 2.Sd4#
      • 1...Be4
        • 2.Qxe4#
      • 1...Sf6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • Q(e);N_SPINQ(e),XR(E)::S(B)
    • Q(e);::S(B)
    • Q(e);CHECK::S(B)
    • R(c);N_GUARD,SBLOCK::S(B),XB(d)
    • B(d);SBLOCK::S(B)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • B(j);N_GUARD,P_SPINB(j)::QAB1(G),XB(j)
      • Refutation
        • P(a);CHECK,XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • Q(e);CHECK,S_CUTB(j)::QAB(G)
      • R(h);N_GUARD,XP(D)::QAB1(G),XP(g)
      • R(h);N_GUARD,XB(I)::QAB1(G),XP(g)
      • R(c);N_GUARD::S(B),XB(d)
      • R(h);N_GUARD::QAB1(G),XP(g)
      • B(d);SBLOCK::S(B)
      • B(j);N_GUARD::QAB1(G),XB(j)
      • S(i);S_CUTR(h)::QAB1(G),XP(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).