MESON Chess Problem Database

Problem Display
PID: 257544 (q1b5/2p2Qb1/3p4/1p1PkPPK/6R1/8/2N5/8 w - - 0 1)

Shire, David J

Phenix, 2021

q1b5/2p2Qb1/3p4/1p1PkPPK/6R1/8/2N5/8

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ba6
      • 2.Qe6#
    • 1...Be6
      • 2.Qxe6#
    • 1...Bb7
      • 2.Qe6#
  • Tries
    • 1.Se3?
      • threat
        • 2.Qxg7#
      • 1...Bf6
        • 2.Qxf6#
      • 1...Bh6
        • 2.Qf6#
      • 1...Bf8
        • 2.Qf6#
      • 1...Bh8!
    • 1.Sd4?
      • threat
        • 2.Sf3#
      • 1...Qxd5
        • 2.Qxg7#
      • 1...Be6
        • 2.Qxe6#
      • 1...Qa3
        • 2.Sc6#
      • 1...Bf6!
    • 1.Qe8+?
      • 1...Kxf5
        • 2.Se3#
        • 2.Qe4#
      • 1...Be6
        • 2.Qxe6#
      • 1...Kxd5!
    • 1.Qe7+?
      • 1...Kxf5
        • 2.Se3#
        • 2.Qe4#
      • 1...Be6
        • 2.Qxe6#
      • 1...Kxd5!
    • 1.Qxg7+?
      • 1...Kxf5
        • 2.Se3#
        • 2.Sd4#
        • 2.Qf6#
      • 1...Kxd5!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Sd3#
      • 1...Qxd5
        • 2.Qxd5#
      • 1...Bxf5
        • 2.Qxg7#
      • 1...Bf6
        • 2.Qxf6#
      • 1...Qa3
        • 2.Sc6#
      • 1...Be6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(g);N_GUARD::QAR1(G)
    • B(g);N_GUARD::QAR1(G),XB(g)
  • Tries
    • Try
      • S(A);
      • Threat
        • QAB(G),XB(e)
      • Vars
        • B(e);N_GUARD::QAB1(G),XB(e)
        • B(e);N_GUARD::QAB1(G)
      • Refutation
        • B(e);
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • Q(f);SBLOCK,XP(C)::QAB(G),XB(e)
        • B(g);N_GUARD::QAR1(G),XB(g)
        • Q(f);N_GUARD::S(A)
      • Refutation
        • B(e);
    • Try
      • Q(G);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAR1(G),XB(g)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
    • Try
      • Q(G);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAR1(G),XB(g)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
    • Try
      • Q(G);CHECK,XB(e)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • Q(f);OGATE,XP(C)::QAR1(G),XQ(f)
      • B(g);SBLOCK,XP(D)::QAB(G),XB(e)
      • B(e);N_GUARD::QAB1(G),XB(e)
      • Q(f);N_GUARD::S(A)
      • B(g);N_GUARD::QAR1(G),XB(g)
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).