MESON Chess Problem Database

Problem Display
PID: 96576 (4r1q1/8/5n1n/6Qb/4kpBR/4pN2/2P1P1K1/B4N2 w - - 0 1)

Mirri, Giorgio

Best Problems, 2004

4r1q1/8/5n1n/6Qb/4kpBR/4pN2/2P1P1K1/B4N2

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qxe5#
    • 1...Ra8
      • 2.Qe5#
    • 1...Rb8
      • 2.Qe5#
    • 1...Rc8
      • 2.Qe5#
    • 1...Rd8
      • 2.Qe5#
    • 1...Rf8
      • 2.Qe5#
    • 1...Sf5
      • 2.Qxf5#
    • 1...Sf7
      • 2.Qf5#
  • Keys
    • 1.Be6!
      • threat
        • 2.Sg3#
        • 2.Rxf4#
      • 1...Qxg5+
        • 2.Sxg5#
      • 1...Bxf3+
        • 2.exf3#
      • 1...Bg4
        • 2.Qe5#
      • 1...Sfg4
        • 2.Qd5#
      • 1...Sd5
        • 2.Sg3#
      • 1...Shg4
        • 2.Qf5#
      • 1...Sf5
        • 2.Rxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 7
  • Sets
    • R(g);N_GUARD::QAR1(I),XR(g)
    • R(g);N_GUARD::QAR1(I)
    • S(f);N_GUARD::QAB1(I),XS(f)
    • S(f);N_GUARD::QAB1(I)
  • Actual
    • B(G);P_PINP(c),P_SPINQ(I)
    • Threat
      • DUALS(2)
    • Vars
      • Q(h);CHECK,XQ(I)::S(F),XQ(h)
      • B(d);CHECK,OGATE,XS(F)::P(D),XB(d)
      • B(d);N_PINQ(I),N_SPINP(c)::QAR1(I)
      • S(e);N_PINQ(I),N_SPINP(c)::QAB1(I)
      • S(e);::S(B)
      • S(f);N_PINQ(I),N_SPINP(c)::QAB1(I)
      • S(f);::R1(H),XP(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).