MESON Chess Problem Database

Problem Display
PID: 71123 (1bn5/1q1p1b1N/Rr3Q1K/1r1kNp2/2R2P2/6p1/B3pB2/2n5 w - - 0 1)

Guidelli, Giorgio

2nd HM., Good Companions (April), 1917

1bn5/1q1p1b1N/Rr3Q1K/1r1kNp2/2R2P2/6p1/B3pB2/2n5

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Rd4#
    • 1...Rxf6+
      • 2.Sxf6#
    • 1...Bd6
      • 2.Qxf7#
    • 1...Sd3
      • 2.Rb4#
  • Tries
    • 1.Rb4+?
      • 1...Sb3
        • 2.Bxb3#
      • 1...Sxa2!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Rd4#
      • 1...Rxf6+
        • 2.Sxf6#
      • 1...Bxf4+
        • 2.Sxf4#
      • 1...Sxd3
        • 2.Rb4#
      • 1...Be6
        • 2.Qd4#
      • 1...Bd6
        • 2.Qxf7#
      • 1...Sd6
        • 2.Qe5#
      • 1...d6
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(d);SBLOCK::B(A)+R(C),DCHECK
    • R(g);CHECK,XQ(G)::S(I),XR(g)
    • B(k);N_PINQ(G),SBLOCK::QAB(G),XB(j)
    • S(a);N_GUARD::B(A)+R(C)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::B(A),XS(a)
      • Refutation
        • S(a);XB(A)
  • Actual
    • S(E);
    • Threat
      • B(A)+R(C),DCHECK
    • Vars
      • R(g);CHECK,XQ(G)::S(I),XR(g)
      • B(k);CHECK,XP(D)::S(E),XB(k)
      • S(a);N_GUARD,XS(E)::B(A)+R(C)
      • B(j);N_PINQ(G),SBLOCK::QAR1(G)
      • B(k);N_PINQ(G),SBLOCK::QAB(G),XB(j)
      • S(l);N_PINQ(G)::QAR1(G)
      • P(i);N_PINQ(G),SBLOCK::QAR2(G),XP(f)
HTML5 logo

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).