MESON Chess Problem Database

Problem Display
PID: 64516 (3N4/8/b2p2p1/3kn1nR/1PrN1Q1K/p4p2/Bb5B/8 w - - 0 1)

Bottacchi, Antonio

Good Companions (January), 1919

3N4/8/b2p2p1/3kn1nR/1PrN1Q1K/p4p2/Bb5B/8

#2

8 + 10

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Tries
    • 1.Sb5?
      • threat
        • 2.Sc7#
      • 1...Se4
        • 2.Qf7#
      • 1...Se6
        • 2.Bxc4#
        • 2.Qxc4#
      • 1...Bxb5!
    • 1.S4c6?
      • threat
        • 2.Se7#
      • 1...Se4
        • 2.Qf7#
      • 1...Sxc6!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Se3#
      • 1...Bc1
        • 2.Qd4#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Sg4
        • 2.Qxf3#
      • 1...Se4
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);P_SPINQ(E)
      • Threat
        • S(D)
      • Vars
        • S(g);N_PINQ(E),P_SPINS(f),SBLOCK::QAB(E)
      • Refutation
        • B(h);XS(D)
    • Try
      • S(D);P_SPINQ(E)
      • Threat
        • S(D)
      • Vars
        • S(g);N_PINQ(E),P_SPINS(f),SBLOCK::QAB(E)
      • Refutation
        • S(f);P_SPINS(g),XS(D)
  • Actual
    • S(D);P_SPINQ(E)
    • Threat
      • S(D)
    • Vars
      • B(a);N_GUARD::QAR1(E)
      • B(a);N_GUARD,N_PINQ(E)::QAR1(E),XB(a)
      • S(f);N_PINQ(E),P_SPINS(g)::QAB(E),XP(c)
      • S(g);N_PINQ(E),P_SPINS(f),SBLOCK::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).