MESON Chess Problem Database

Problem Display
PID: 198348 (B7/bn6/4p2B/1K6/1pR2Q2/3k4/4q3/8 w - - 0 1)

ten Cate, Pieter

Gymnasiasten Schach Blad, 1920

B7/bn6/4p2B/1K6/1pR2Q2/3k4/4q3/8

#2

5 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Qe4#
    • 1...Qf1
      • 2.Qd2#
      • 2.Qxf1#
      • 2.Qe4#
    • 1...Qf3
      • 2.Qd2#
    • 1...Qg4
      • 2.Qd2#
    • 1...Qa2
      • 2.Qe4#
    • 1...Qb2
      • 2.Qe4#
    • 1...Qc2
      • 2.Qe4#
    • 1...Qd2
      • 2.Qxd2#
      • 2.Qe4#
    • 1...Qf2
      • 2.Qe4#
    • 1...Qh2
      • 2.Qe4#
    • 1...Qe4
      • 2.Qd2#
      • 2.Qxe4#
    • 1...Bd4
      • 2.Qxd4#
    • 1...Bb8
      • 2.Qd4#
    • 1...Sc5
      • 2.Qd6#
      • 2.Qd4#
  • Tries
    • 1.Qd6+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Sxd6+!
    • 1.Qf5+?
      • 1...Qe4
        • 2.Qxe4#
      • 1...exf5!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Qc4#
      • 1...Sd6+
        • 2.Qxd6#
      • 1...Qg4
        • 2.Qe3#
      • 1...Qa2
        • 2.Qe3#
      • 1...Qc2
        • 2.Qe3#
      • 1...Qe3
        • 2.Qxe3#
      • 1...Qe4
        • 2.Qd2#
      • 1...Sa5
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD::QAB1(B)
    • Q(a);N_GUARD::QAR1(B)
    • B(e);N_GUARD::QAR1(B),XB(e)
    • B(e);N_GUARD::QAR1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • B(e);N_GUARD,P_SPINB(e)::QAR1(B),XB(e)
      • Refutation
        • S(f);CHECK,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAB1(B),XQ(a)
      • Refutation
        • P(d);XQ(B)
  • Actual
    • R(A);
    • Threat
      • QAB1(B)
    • Vars
      • S(f);CHECK,N_GUARD::QAR(B),XS(f)
      • Q(a);N_GUARD::QAR1(B)
      • Q(a);N_GUARD::QAR1(B),XQ(a)
      • Q(a);N_GUARD,SBLOCK::QAR1(B)
      • S(f);N_GUARD::QAR(B)
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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).