MESON Chess Problem Database

Problem Display
PID: 61069 (1B3bN1/3p2pB/KQ4r1/5krn/2n1R1p1/2N3P1/8/8 w - - 0 1)

Ellerman, Arnoldo

4th Prize, Good Companions (December), 1920

1B3bN1/3p2pB/KQ4r1/5krn/2n1R1p1/2N3P1/8/8

#2

8 + 9

3132 The Good Companion Two-Mover 1922
14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Be7
      • 2.Sxe7#
    • 1...Sb2
      • 2.Re5#
    • 1...Sd2
      • 2.Re5#
    • 1...Sa3
      • 2.Re5#
    • 1...Se3
      • 2.Re5#
    • 1...Sa5
      • 2.Re5#
    • 1...Se5
      • 2.Rxe5#
    • 1...Sxb6
      • 2.Re5#
    • 1...Sd6
      • 2.Qc5#
    • 1...Sxg3
      • 2.Rf4#
    • 1...Sf4
      • 2.Rxf4#
    • 1...Sf6
      • 2.Rf4#
      • 2.Qf2#
    • 1...d5
      • 2.Qe6#
  • Keys
    • 1.Re7!
      • 1...Bxe7
        • 2.Sxe7#
      • 1...Sxb6
        • 2.Re5#
      • 1...Sxg3
        • 2.Rf7#
      • 1...Sb2
        • 2.Re5#
      • 1...Sd2
        • 2.Re5#
      • 1...Sa3
        • 2.Re5#
      • 1...Se3
        • 2.Re5#
      • 1...Sa5
        • 2.Re5#
      • 1...Se5
        • 2.Rxe5#
      • 1...Sd6
        • 2.Qc5#
      • 1...Sf4
        • 2.Rf7#
      • 1...Sf6
        • 2.Qf2#
      • 1...d5
        • 2.Qe6#
      • 1...d6
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(i);N_GUARD::S(H),XB(i)
    • S(a);N_GUARD::R1(C)
    • S(a);N_GUARD::R1(C),XS(a)
    • S(a);N_GUARD,XQ(E)::R1(C)
    • S(a);N_PINQ(E)::QAR(E)
    • S(e);N_GUARD,XP(B)::R1(C)
    • S(e);N_GUARD::R1(C),XS(e)
    • P(g);N_GUARD::QAB1(E)
  • Actual
    • R(C);
    • Vars
      • B(i);XR(C)::S(H),XB(i)
      • S(a);N_GUARD,XQ(E)::R1(C)
      • S(e);N_GUARD,XP(B)::R(C)
      • S(a);N_GUARD::R1(C)
      • S(a);N_GUARD::R1(C),XS(a)
      • S(a);N_PINQ(E)::QAR(E)
      • S(e);N_GUARD::R(C)
      • S(e);N_PINQ(E)::QAR(E)
      • P(g);N_GUARD::QAB1(E)
      • P(g);N_PINQ(E)::QAB(E)
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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).