MESON Chess Problem Database

Problem Display
PID: 152930 (3R4/r1pQ3K/1r1p2p1/1P1k3p/R1N5/B2p1P2/8/b4bq1 w - - 0 1)

Dawson, Thomas Rayner

British Chess Magazine, 1944

3R4/r1pQ3K/1r1p2p1/1P1k3p/R1N5/B2p1P2/8/b4bq1

#2

8 + 11

15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Qf7#
    • 1...Bd4
      • 2.Qf7#
  • Tries
    • 1.Se3+?
      • 1...Ke5
        • 2.Qe7#
      • 1...Qxe3!
    • 1.Qf5+?
      • 1...Kd4
        • 2.Qe5#
      • 1...Be5
        • 2.Qxe5#
      • 1...gxf5!
    • 1.Qe6+?
      • 1...Kd4
        • 2.Qe5#
      • 1...Kxe6!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qe4#
      • 1...Kd4
        • 2.Qe5#
      • 1...Qe3
        • 2.Sxe3#
      • 1...Qd4
        • 2.Qf7#
      • 1...Qg4
        • 2.Se3#
      • 1...Be5
        • 2.Qxe5#
      • 1...c5
        • 2.Sxb6#
      • 1...c6
        • 2.Rxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • Q(c);SBLOCK::QAB(F)
    • B(a);SBLOCK::QAB(F)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(e);N_SPINP(h),P-FLIGHT::QAR2(F)
      • Refutation
        • Q(c);XS(D)
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);P-FLIGHT::QAB1(F)
        • B(a);N_GUARD,P_SPINB(a)::QAR1(F),XB(a)
      • Refutation
        • P(i);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);P-FLIGHT::QAB1(F)
      • Refutation
        • K(e);N_SPINP(h),S_FLIGHT,XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • K(e);P-FLIGHT::QAB1(F)
      • Q(c);N_GUARD::S(D),XQ(c)
      • Q(c);SBLOCK::QAB(F)
      • Q(c);N_GUARD::S(D)
      • B(a);N_GUARD::QAR1(F),XB(a)
      • P(k);N_GUARD,P_PINQ(F),S_CUTQ(c)::S(D),XR(g)
      • P(k);N_GUARD,P_PINQ(F),S_CUTR(g)::R1(H),XP(h)
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).