MESON Chess Problem Database

Problem Display
PID: 194042 (RR6/4N3/Nr2B2K/pk6/rp2n3/4p3/8/1b4Q1 w - - 0 1)

Guidelli, Giorgio

1st HM., L'Italia Scacchistica, 1917

RR6/4N3/Nr2B2K/pk6/rp2n3/4p3/8/1b4Q1

#2

7 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rb7
      • 2.Rxb7#
    • 1...Sc5
      • 2.Sc7#
    • 1...e2
      • 2.Sc7#
      • 2.Rxb6#
      • 2.Qxb6#
  • Tries
    • 1.Qf1+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...e2!
    • 1.Qg5+?
      • 1...Sc5
        • 2.Sc7#
        • 2.Qxc5#
      • 1...Sxg5!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qe8#
      • 1...Rxb8
        • 2.Qxb8#
      • 1...Rb7
        • 2.Rxb7#
      • 1...Sc5
        • 2.Sc7#
      • 1...Sd6
        • 2.Bd7#
      • 1...Sf6
        • 2.Bc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(h);N_PINB(C),OGATEB::R(G),XR(h)
    • S(e);SBLOCK::S(B)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB(A),XB(a)
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • Q(A);CHECK
      • Refutation
        • S(e);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • R(h);N_PINB(C),N_SPINR(h),OGATE,XR(G)::QAR(A),XR(h)
      • R(h);N_PINB(C),OGATEB::R(G),XR(h)
      • S(e);SBLOCK::S(B)
      • S(e);N_PINB(C)::B(C)
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).