MESON Chess Problem Database

Problem Display
PID: 56548 (N3Kb2/5p2/p1p5/rknb3R/nB5R/4QNp1/4r1q1/5B2 w - - 0 1)

Guidelli, Giorgio

1st Prize, Brisbane Courier, 1916-1917

N3Kb2/5p2/p1p5/rknb3R/nB5R/4QNp1/4r1q1/5B2

#2

8 + 12

2643 Good Companions (July) 1917
3132 The Good Companion Two-Mover 1922
3391 Het Half Pin Thema 1924
56 The Problemist 2005

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Sc7#
    • 1...Sd3
      • 2.Sc7#
    • 1...Se6
      • 2.Qd3#
    • 1...Sb7
      • 2.Sc7#
    • 1...Sd7
      • 2.Sc7#
  • Tries
    • 1.Qxe2+?
      • 1...Bc4
        • 2.Qxc4#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Qxe2+!
  • Keys
    • 1.Ba3!
      • threat
        • 2.Rb4#
      • 1...Be4
        • 2.Qb3#
      • 1...Se4
        • 2.Qd3#
      • 1...Bc4
        • 2.Sd4#
      • 1...Sb3
        • 2.Sc7#
      • 1...Sd3
        • 2.Sc7#
      • 1...Se6
        • 2.Qd3#
      • 1...Sb7
        • 2.Sc7#
      • 1...Sd7
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(g);P_SPINB(h)::S(G)
    • S(g);N_SPINR(a),P_SPINB(h)::S(G)
    • S(g);N_PINQ(B),P_SPINB(h)::QAB(B)
  • Tries
    • Try
      • Q(B);CHECK,N_SPINQ(B),XR(a)
      • Vars
        • B(h);N_GUARD,P_SPINB(h),P_SPINS(g)::QAB1(B),XB(h)
        • S(g);N_GUARD,P_SPINB(h),P_SPINS(g)::QAB(B),XS(g)
      • Refutation
        • Q(b);CHECK,P_SPINQ(b),XQ(B)
  • Actual
    • B(D);
    • Threat
      • R1(E)
    • Vars
      • B(h);N_PINQ(B),P_SPINS(g)::QAR2(B)
      • S(g);N_PINQ(B),P_SPINB(h)::QAB(B)
      • B(h);N_SPINR(a),P_SPINS(g),SBLOCK::S(C)
      • S(g);P_SPINB(h)::S(G)
      • S(g);N_SPINR(a),P_SPINB(h)::S(G)
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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).