MESON Chess Problem Database

Problem Display
PID: 204479 (4b3/6Q1/1R2N2r/K4k1q/1R3Bpb/1p6/2r5/1B6 w - - 0 1)

ten Cate, Pieter

Tijdschrift vd NSB, 1925

4b3/6Q1/1R2N2r/K4k1q/1R3Bpb/1p6/2r5/1B6

#2

7 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qg6
      • 2.Qe5#
    • 1...Rg6
      • 2.Qe5#
    • 1...Bg6
      • 2.Qe5#
    • 1...b2
      • 2.Bxc2#
  • Tries
    • 1.Qg5+?
      • 1...Bxg5
        • 2.Sg7#
      • 1...Qxg5!
    • 1.Qf7+?
      • 1...Rf6
        • 2.Sg7#
      • 1...Bf6
        • 2.Sg7#
      • 1...Bxf7
        • 2.Sg7#
      • 1...Qxf7!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Sg7#
      • 1...Kf6+
        • 2.Sc5#
      • 1...Kg6+
        • 2.Sg5#
      • 1...Rxe6
        • 2.Qxe6#
      • 1...Rf6
        • 2.Qd3#
      • 1...Bf6
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • Q(f);SBLOCK::QAR1(G)
    • R(g);SBLOCK::QAR1(G)
    • B(h);SBLOCK::QAR1(G)
    • P(b);N_GUARD::B(A),XR(a)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • B(d);XQ(G)::S(F)
      • Refutation
        • Q(f);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • R(g);::S(F)
        • B(d);P_SPINB(d)::S(F)
        • B(h);XQ(G)::S(F)
      • Refutation
        • Q(f);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)+S(F),DCHECK
    • Vars
      • K(e);CHECK,N_SPINR(a),P-FLIGHT::R(E)+S(F)
      • K(e);CHECK,S_FLIGHT::R(E)+S(F)
      • R(g);OGATE,XS(F)::QAB1(G),XR(g)
      • R(g);SBLOCK::QAB(G)
      • B(d);SBLOCK::QAB(G)
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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).