MESON Chess Problem Database

Problem Display
PID: 97513 (3N2Q1/2p1qR2/1R3rr1/8/1Pk2pp1/8/K1N1P3/4B2B w - - 0 1)

de Blasio, Francis JC

Problem (Zagreb), 1953

3N2Q1/2p1qR2/1R3rr1/8/1Pk2pp1/8/K1N1P3/4B2B

#2

10 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb4
      • 2.Rxc7#
    • 1...Qd6
      • 2.Rxc7#
    • 1...Qxd8
      • 2.Rxc7#
    • 1...Qf8
      • 2.Rxc7#
    • 1...Qe3
      • 2.Rxc7#
    • 1...Qe4
      • 2.Rxc7#
    • 1...Qe5
      • 2.Rxc7#
    • 1...Qe6
      • 2.Rxc7#
    • 1...Qe8
      • 2.Rxc7#
    • 1...Rc6
      • 2.Rxf4#
    • 1...Rd6
      • 2.Rxf4#
    • 1...Re6
      • 2.Rxf4#
  • Tries
    • 1.Rfxf6+?
      • 1...Qe6
        • 2.Rxf4#
        • 2.Qxe6#
      • 1...Qf7
        • 2.Rxf4#
        • 2.Qxf7#
      • 1...Rxg8!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sa3#
      • 1...Qxb4
        • 2.Rxb4#
      • 1...Qxe6
        • 2.Rxc7#
      • 1...Rxe6
        • 2.Rxf4#
      • 1...f3
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 9
  • Sets
    • Q(g);OGATE,XP(F)::QAB(J)+R(H),DCHECK,XP(f)
    • Q(g);OGATE::QAB(J)+R(H),DCHECK,XP(f)
    • Q(g);OGATE,XS(I)::QAB(J)+R(H),DCHECK,XP(f)
    • Q(g);OGATE::R(H),XP(f)
    • R(d);OGATE::QAB(J)+R(H),DCHECK,XP(b)
    • R(d);OGATE::R(H),XP(b)
  • Tries
    • Try
      • R(H);CHECK,XR(d)
      • Refutation
        • R(e);XQ(J)
  • Actual
    • S(I);
    • Threat
      • S(D)
    • Vars
      • Q(g);OGATE,XP(F)::R1(G),XQ(g)
      • Q(g);OGATE,XS(I)::R(H),XP(f)
      • R(d);OGATE,XS(I)::R(H),XP(b)
      • P(b);N_GUARD::S(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).