MESON Chess Problem Database

Problem Display
PID: 21193 (3K4/2R5/8/P5pb/2Q5/2B5/2k3r1/n4R2 w - - 0 1)

Westbury, Eric Ernest

1st Prize, Good Companions (May Meredith Ty.), 1917

3K4/2R5/8/P5pb/2Q5/2B5/2k3r1/n4R2

#2

6 + 5

3132 The Good Companion Two-Mover 1922
56 The Problemist 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Rd2+
      • 2.Bd4#
    • 1...Sb3
      • 2.Qe4#
  • Tries
    • 1.Bb2+?
      • 1...Kd2
        • 2.Bc1#
      • 1...Kxb2!
    • 1.Rb7?
      • threat
        • 2.Rb2#
      • 1...Rd2+
        • 2.Bd4#
      • 1...Bd1
        • 2.Be1#
      • 1...Sb3!
    • 1.Qa4+?
      • 1...Sb3
        • 2.Qe4#
      • 1...Kd3!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qb1#
      • 1...Rd2+
        • 2.Bd4#
      • 1...Bd1
        • 2.Be1#
      • 1...Sb3
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);CHECK,SBLOCK::QAR(C)+B(B)
    • S(a);SBLOCK::QAB(C)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • K(b);P-FLIGHT::B(B)
      • Refutation
        • K(b);P-FLIGHT,XB(B)
    • Try
      • R(E);
      • Threat
        • R1(E)
      • Vars
        • R(c);CHECK,SBLOCK::QAR(C)+B(B)
        • B(e);SBLOCK::QAR(C)+B(B)
      • Refutation
        • S(a);
    • Try
      • Q(C);CHECK
      • Vars
        • S(a);P_SPINS(a),SBLOCK::QAB(C)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • R(c);CHECK,SBLOCK::R(E)+B(B)
      • B(e);SBLOCK::R(E)+B(B)
      • S(a);SBLOCK::QAB(C)
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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).