MESON Chess Problem Database

Problem Display
PID: 60989 (8/BBp5/K7/R7/3p1kN1/nR5P/q1p1Q1p1/b1N1nb2 w - - 0 1)

Rothstein, Louis

3rd HM., Good Companions (January), 1917

8/BBp5/K7/R7/3p1kN1/nR5P/q1p1Q1p1/b1N1nb2

#2

9 + 10

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe2+
      • 2.Sxe2#
    • 1...Sd3
      • 2.Qf3#
    • 1...Sf3
      • 2.Rxf3#
    • 1...Sc4
      • 2.Qe4#
    • 1...Sb5
      • 2.Qe5#
    • 1...d3
      • 2.Qe3#
    • 1...c6
      • 2.Bb8#
  • Tries
    • 1.Sd3+?
      • 1...Sxd3
        • 2.Qf3#
      • 1...Kg3!
  • Keys
    • 1.Bb8!
      • threat
        • 2.Bxc7#
      • 1...Bxe2+
        • 2.Sxe2#
      • 1...Sd3
        • 2.Qf3#
      • 1...Sf3
        • 2.Rxf3#
      • 1...Sb5
        • 2.Qe5#
      • 1...d3
        • 2.Qe3#
      • 1...Sc4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • B(c);CHECK,XQ(B)::S(A),XB(c)
    • S(b);N_PINQ(B)::QAR1(B)
    • S(b);N_GUARD::R1(C),XS(b)
    • S(g);N_PINQ(B),P_PINR(F)::QAR1(B)
    • S(g);N_PINQ(B),P_PINR(F)::QAB1(B)
    • P(h);N_PINQ(B)::QAB1(B)
    • P(j);OGATEB::B(H)
  • Tries
    • Try
      • S(A);CHECK,N_SPINQ(B)
      • Vars
        • S(b);XS(A)::QAR1(B)
      • Refutation
        • K(i);S_FLIGHT
  • Actual
    • B(H);P_PINP(j)
    • Threat
      • B(H),XP(j)
    • Vars
      • B(c);CHECK,XQ(B)::S(A),XB(c)
      • S(b);N_PINQ(B)::QAR1(B)
      • S(b);N_GUARD::R1(C),XS(b)
      • S(g);N_PINQ(B),P_PINR(F)::QAB1(B)
      • P(h);N_PINQ(B)::QAB1(B)
      • S(g);N_PINQ(B),P_PINR(F)::QAR1(B)
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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).