MESON Chess Problem Database

Problem Display
PID: 21370 (4N2B/2p4B/R3p2Q/p1rk4/nPp3b1/K3prbp/2N1np2/8 w - - 0 1)

Ellerman, Arnoldo

1st Prize, Good Companions (October), 1918

4N2B/2p4B/R3p2Q/p1rk4/nPp3b1/K3prbp/2N1np2/8

#2

8 + 14

3132 The Good Companion Two-Mover 1922
133 The Problemist Supplement 2003

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Sxe3#
    • 1...Rf5
      • 2.Qxe6#
    • 1...Rf7
      • 2.Sxe3#
    • 1...Rf8
      • 2.Sxe3#
    • 1...Bh5
      • 2.Qxe6#
    • 1...axb4+
      • 2.Sxb4#
  • Keys
    • 1.Qxe3!
      • threat
        • 2.Be4#
      • 1...Rxe3+
        • 2.Sxe3#
      • 1...axb4+
        • 2.Sxb4#
      • 1...c3
        • 2.Qe4#
      • 1...Rf4
        • 2.Qe5#
      • 1...Rf5
        • 2.Qxe6#
      • 1...Rf6
        • 2.Sxf6#
        • 2.Qe4#
      • 1...Bf5
        • 2.Sf6#
      • 1...Sec3
        • 2.Qd4#
      • 1...Sac3
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • R(d);N_GUARD::S(A),XP(c)
    • R(d);S_CUTB(i)::QAB1(E),XP(m)
    • B(i);N_GUARD::QAB1(E),XP(m)
    • P(j);CHECK,XP(C)::S(A),XP(j)
  • Actual
    • Q(E);P_SPINQ(E),XP(c)
    • Threat
      • B(F)
    • Vars
      • R(d);CHECK,XQ(E)::S(A),XR(d)
      • P(j);CHECK,XP(C)::S(A),XP(j)
      • P(h);N_PINQ(E)::QAB1(E)
      • R(d);N_PINQ(E)::QAR1(E)
      • R(d);N_PINQ(E)::QAB1(E),XP(m)
      • B(i);S_CUTR(d)::S(G)
      • S(a);N_PINQ(E)::QAR1(E)
      • S(g);N_PINQ(E)::QAR1(E),XR(k)
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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).