MESON Chess Problem Database

Problem Display
PID: 263985 (3B3K/5B2/7k/4p1N1/4p3/6p1/4br2/Q7 w - - 0 1)

ten Cate, Pieter

Tijdschrift vd KNSB, 1948

3B3K/5B2/7k/4p1N1/4p3/6p1/4br2/Q7

#2

5 + 6

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.Qh1#
    • 1...Bf3
      • 2.Qa6#
  • Tries
    • 1.Qxe5?
      • threat
        • 2.Qg7#
      • 1...Rf6
        • 2.Qxf6#
      • 1...Rxf7!
    • 1.Qh1+?
      • 1...Bh5
        • 2.Qxh5#
      • 1...Rh2!
    • 1.Qa6+?
      • 1...Rf6
        • 2.Qxf6#
      • 1...Bxa6!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Bg5#
      • 1...Rxf3
        • 2.Qh1#
      • 1...Bxf3
        • 2.Qa6#
      • 1...exf3
        • 2.Qc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD,S_CUTB(a)::QAR(A)
    • B(a);N_GUARD,S_CUTR(b)::QAB1(A)
  • Tries
    • Try
      • Q(A);XP(e)
      • Threat
        • QAB1(A)
      • Vars
        • R(b);N_GUARD::QAR2(A),XR(b)
      • Refutation
        • R(b);XB(C)
    • Try
      • Q(A);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(A),XB(a)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • Q(A);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAR2(A),XR(b)
      • Refutation
        • B(a);XQ(A)
  • Actual
    • S(B);
    • Threat
      • B(D)
    • Vars
      • R(b);N_GUARD,XS(B)::QAR(A)
      • B(a);N_GUARD,XS(B)::QAB1(A)
      • P(d);N_GUARD,XS(B)::QAB(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).