MESON Chess Problem Database

Problem Display
PID: 145771 (5K2/5p1b/3p1k2/3P1r1p/7P/2P2N2/5Q2/1B6 w - - 0 1)

Betts, Frederick Charles

Good Companions (November), 1917

5K2/5p1b/3p1k2/3P1r1p/7P/2P2N2/5Q2/1B6

#2

7 + 6

15351 SCPF/BCPS Black Books 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf3
      • 2.Qd4#
    • 1...Rg5
      • 2.hxg5#
  • Tries
    • 1.Qe3?
      • 1...Kg6
        • 2.Qg5#
      • 1...Rxf3
        • 2.Qd4#
        • 2.Qg5#
        • 2.Qe7#
      • 1...Rxd5
        • 2.Qe7#
      • 1...Rf4
        • 2.Qe7#
      • 1...Rg5
        • 2.Qxg5#
        • 2.Qe7#
        • 2.hxg5#
      • 1...Bg6
        • 2.Qe7#
      • 1...Bg8
        • 2.Qh6#
      • 1...Re5!
    • 1.Qg3?
      • threat
        • 2.Qxd6#
        • 2.Qg7#
      • 1...Re5
        • 2.Qg7#
      • 1...Rf4
        • 2.Qg5#
        • 2.Qg7#
      • 1...Rg5
        • 2.Qxd6#
        • 2.Qxg5#
        • 2.hxg5#
      • 1...Bg6
        • 2.Qxd6#
      • 1...Rxd5!
    • 1.Qd4+?
      • 1...Kg6
        • 2.Qg7#
      • 1...Re5!
  • Keys
    • 1.Se5!
      • 1...Kxe5
        • 2.Qd4#
      • 1...Rxf2
        • 2.Sd7#
      • 1...dxe5
        • 2.Qb6#
      • 1...Rf3
        • 2.Sd7#
      • 1...Rf4
        • 2.Sd7#
      • 1...Bg6
        • 2.Sd7#
      • 1...Bg8
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD,P_SPINR(a),XS(D)::QAB(B)
    • R(a);OGATE::P(E),XR(a)
  • Tries
    • Try
      • Q(B);
      • Vars
        • K(d);P-FLIGHT,P_SPINR(a)::QAR1(B)
        • R(a);XP(F)::QAB1(B)
        • R(a);::QAB1(B)
        • B(f);SBLOCK::QAB1(B)
        • B(f);N_GUARD::QAR2(B)
      • Refutation
        • R(a);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::QAB1(B)
        • B(f);SBLOCK::QAR2(B),XP(c)
      • Refutation
        • R(a);XP(F)
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);OGATE,P-FLIGHT,P_SPINR(a)::QAR1(B)
      • Refutation
        • R(a);P_SPINR(a)
  • Actual
    • S(D);P_PINR(a)
    • Vars
      • K(d);N_SPINR(a),OGATEB,S_FLIGHT,XS(D)::QAB1(B)
      • R(a);N_SPINR(a),XQ(B)::S(D)
      • P(c);OGATEB,SBLOCK,XS(D)::QAR(B)
      • R(a);::S(D)
      • B(f);SBLOCK::S(D)
      • B(f);N_GUARD::QAR1(B),XR(a)
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).