MESON Chess Problem Database

Problem Display
PID: 214919 (8/Qrr5/N2p4/p2N4/kPB5/P7/K7/b7 w - - 0 1)

Baraldi, Paolo

Baltimore American and Commercial Advertiser, 1880

8/Qrr5/N2p4/p2N4/kPB5/P7/K7/b7

#2

7 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.Bb3#
    • 1...Rb6
      • 2.Sxb6#
    • 1...Rxa7
      • 2.Sb6#
    • 1...Bc3
      • 2.Sxc3#
    • 1...axb4
      • 2.Sc5#
  • Tries
    • 1.Sc5+?
      • 1...dxc5
        • 2.Qxa5#
      • 1...Rxc5!
    • 1.Saxc7?
      • threat
        • 2.Bb3#
        • 2.Qxa5#
      • 1...Rxa7
        • 2.Sb6#
        • 2.Bb3#
        • 2.Bb5#
      • 1...Rxc7
        • 2.Sb6#
        • 2.Qxa5#
      • 1...Rb5
        • 2.Bb3#
        • 2.Bxb5#
      • 1...Rxb4!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Bb3#
        • 2.Bb5#
        • 2.Qxa5#
      • 1...Rxb6
        • 2.Sxb6#
      • 1...Rxc4
        • 2.Qxa5#
      • 1...axb4
        • 2.Bb3#
        • 2.Bb5#
      • 1...Rc5
        • 2.Bb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(e);SBLOCK::B(D)
    • R(e);N_GUARD::S(E),XR(e)
    • R(e);N_GUARD,XQ(G)::S(E)
    • B(a);N_GUARD::S(E),XB(a)
    • P(c);XP(C)::QAR(G)+S(F),DCHECK
  • Tries
    • Try
      • S(F);CHECK,P_PINP(c)
      • Vars
        • P(d);XS(F)::QAR1(G),XP(c)
      • Refutation
        • R(f);XS(F)
    • Try
      • S(F);P_PINP(c),XR(f)
      • Threat
        • DUALS(2)
      • Refutation
        • R(e);XP(C)
  • Actual
    • Q(G);
    • Threat
      • DUALS(3)
    • Vars
      • R(e);XQ(G)::S(E),XR(e)
      • R(f);XB(D)::QAR1(G),XP(c)
      • R(f);::B(D)
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).