MESON Chess Problem Database

Problem Display
PID: 256587 (bK6/p1p5/1b2p3/p3QRp1/5qp1/5k2/3P1B1R/1B6 w - - 0 1)

Dawson, Thomas Rayner

British Chess Magazine, 1933

bK6/p1p5/1b2p3/p3QRp1/5qp1/5k2/3P1B1R/1B6

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.Qxe3#
    • 1...Be4
      • 2.Qxe4#
  • Tries
    • 1.Bd3?
      • threat
        • 2.Be2#
        • 2.Qe2#
      • 1...Qxf5
        • 2.Be2#
        • 2.Qg3#
      • 1...Be3
        • 2.Qxe3#
      • 1...Be4
        • 2.Qxe4#
      • 1...c5
        • 2.Be2#
      • 1...c6
        • 2.Be2#
      • 1...Bxf2!
    • 1.Qc3+?
      • 1...Be3
        • 2.Qxe3#
      • 1...Ke2!
  • Keys
    • 1.Bh4!
      • threat
        • 2.Qe2#
      • 1...Qxf5
        • 2.Qg3#
      • 1...gxh4
        • 2.Qxf4#
      • 1...Bf2
        • 2.Rxf2#
      • 1...Be3
        • 2.Qxe3#
      • 1...Be4
        • 2.Bxe4#
        • 2.Qxe4#
      • 1...c5
        • 2.Rf2#
      • 1...c6
        • 2.Be4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(f);N_GUARD::QAR1(E),XB(f)
    • B(j);N_GUARD::QAB1(E),XB(j)
  • Tries
    • Try
      • B(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(f);N_GUARD::QAR1(E),XB(f)
        • B(j);N_GUARD::QAB1(E),XB(j)
        • P(i);P_PINQ(E)::B(A)
      • Refutation
        • B(f);XB(C)
    • Try
      • Q(E);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAR1(E),XB(f)
      • Refutation
        • K(a);N_SPINQ(b),S_FLIGHT
  • Actual
    • B(C);
    • Threat
      • QAB1(E)
    • Vars
      • Q(b);N_SPINQ(b),OGATE,XR(F)::QAR1(E)
      • P(e);N_GUARD,XB(C)::QAR1(E),XQ(b)
      • B(f);N_GUARD::R1(D),XB(f)
      • B(f);N_GUARD::QAR1(E),XB(f)
      • P(i);P_PINQ(E),S_CUTB(f)::R1(D)
      • P(i);P_PINQ(E),S_CUTB(j)::B(A)
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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).