MESON Chess Problem Database

Problem Display
PID: 21022 (4B3/2K5/ppRpp3/1r1kb3/Nn1q4/1P3RN1/1p1rpB2/3Q4 w - - 0 1)

Guidelli, Giorgio

Good Companions (November), 1915

4B3/2K5/ppRpp3/1r1kb3/Nn1q4/1P3RN1/1p1rpB2/3Q4

#2

9 + 12

3132 The Good Companion Two-Mover 1922
887 Mate in Two Moves 1931

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.bxc4#
    • 1...Rc5
      • 2.Sxb6#
    • 1...Sxc6
      • 2.Bxc6#
  • Keys
    • 1.Rf5!
      • threat
        • 2.Rxd6#
      • 1...Sxc6
        • 2.Bxc6#
      • 1...exf5
        • 2.Bf7#
      • 1...Qc3
        • 2.Sxc3#
      • 1...Qc5
        • 2.Qh1#
      • 1...Qc4
        • 2.bxc4#
      • 1...Rc2
        • 2.Qxd4#
      • 1...Rc5
        • 2.Sxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(e);OGATE,P_PINR(G),P_SPINR(b)::P(C),XQ(e)
    • R(f);N_GUARD,P_PINR(G),S_CUTQ(e)::S(F),XP(j)
    • S(d);OGATE,XR(G)::B(I),XS(d)
  • Actual
    • R(D);P_PINB(h)
    • Threat
      • R1(G),XP(k)
    • Vars
      • S(d);OGATE,XR(G)::B(I),XS(d)
      • P(l);N_SPINB(h),OGATEB,XR(D)::B(I)
      • Q(e);N_GUARD,P_PINR(G),P_SPINR(b)::S(F),XQ(e)
      • Q(e);N_GUARD,P_PINR(G),P_SPINR(b)::QAB(A)
      • Q(e);OGATE,P_PINR(G),P_SPINR(b)::P(C),XQ(e)
      • R(b);OGATE,P_PINR(G),P_SPINQ(e)::QAR1(A),XQ(e)
      • R(f);N_GUARD,P_PINR(G),S_CUTQ(e)::S(F),XP(j)
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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).