MESON Chess Problem Database

Problem Display
PID: 269900 (B1Q5/3N4/3pp3/3p2p1/2pk4/8/2KP4/5R2 w - - 0 1)

Tompuri, Ismo

Tehtavaniekka, 2021

B1Q5/3N4/3pp3/3p2p1/2pk4/8/2KP4/5R2

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qxc4#
    • 1...g4
      • 2.Rf4#
  • Tries
    • 1.Qa6?
      • 1...Ke4
        • 2.Qxc4#
      • 1...c3
        • 2.Qd3#
        • 2.Qa4#
      • 1...g4
        • 2.Rf4#
      • 1...e5!
    • 1.Qb7?
      • 1...c3
        • 2.Qb4#
      • 1...g4
        • 2.Rf4#
      • 1...e5
        • 2.Qxd5#
      • 1...Ke4!
    • 1.Qc5+?
      • 1...Ke4
        • 2.Qe3#
        • 2.Qxc4#
      • 1...dxc5!
  • Keys
    • 1.Qc6!
      • 1...Ke4
        • 2.Qxc4#
      • 1...c3
        • 2.Qa4#
      • 1...g4
        • 2.Rf4#
      • 1...e5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);N_GUARD,P-FLIGHT,P_SPINP(c)::QAR2(F),XP(a)
    • P(d);N_GUARD::R(A)
  • Tries
    • Try
      • Q(F);
      • Vars
        • K(b);N_GUARD,P-FLIGHT,P_SPINP(c)::QAR2(F),XP(a)
        • P(d);N_GUARD::R(A)
      • Refutation
        • P(f);
    • Try
      • Q(F);
      • Vars
        • P(a);OGATEB::QAR2(F)
        • P(d);N_GUARD::R(A)
        • P(f);N_GUARD::QAR1(F),XP(c)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(c)
    • Try
      • Q(F);CHECK
      • Refutation
        • P(e);XQ(F)
  • Actual
    • Q(F);
    • Vars
      • K(b);N_GUARD,P-FLIGHT,P_SPINP(c)::QAR2(F),XP(a)
      • P(a);OGATEB::QAR(F)
      • P(d);N_GUARD::R(A)
      • P(f);N_GUARD::QAR1(F),XP(c)
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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).