MESON Chess Problem Database

Problem Display
PID: 109887 (2bK4/7p/n1Pk2n1/5P2/1P1p1P1N/B3p3/8/R5QB w - - 0 1)

Homsi, Georges

CXEB, 1980

2bK4/7p/n1Pk2n1/5P2/1P1p1P1N/B3p3/8/R5QB

#2

10 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxb4
      • 2.Bxb4#
    • 1...Sc5
      • 2.bxc5#
    • 1...Sc7
      • 2.b5#
    • 1...Sb8
      • 2.b5#
    • 1...e2
      • 2.Qxd4#
  • Tries
    • 1.Qxg6+?
      • 1...Be6
        • 2.Qxe6#
      • 1...hxg6!
    • 1.b5+?
      • 1...Sb4
        • 2.Bxb4#
      • 1...Sc5!
  • Keys
    • 1.Qxe3!
      • threat
        • 2.Qxd4#
      • 1...Bxf5
        • 2.Sxf5#
      • 1...Sxf4
        • 2.Qxf4#
        • 2.Qe7#
      • 1...dxe3
        • 2.Rd1#
      • 1...Be6
        • 2.Qxe6#
      • 1...Sc7
        • 2.b5#
      • 1...Se7
        • 2.Qe5#
        • 2.Qxe7#
      • 1...d3
        • 2.Qd4#
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(c);OGATE,P_SPINS(c),XP(E)::B(D),XS(c)
    • S(c);OGATE::P(E),XS(c)
    • S(c);N_GUARD::B(D)+P(E)
    • P(a);OGATE::QAR2(B),XP(b)
  • Tries
    • Try
      • Q(B);CHECK,XS(e)
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAR1(B),XB(g)
      • Refutation
        • P(f);XQ(B)
    • Try
      • P(E);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::B(D),XS(c)
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • Q(B);XP(a)
    • Threat
      • QAR2(B),XP(b)
    • Vars
      • B(g);XP(H)::S(G),XB(g)
      • P(b);OGATEB,XQ(B)::R(A)
      • B(g);N_GUARD::QAR1(B),XB(g)
      • S(c);N_GUARD::B(D)+P(E)
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).