MESON Chess Problem Database

Problem Display
PID: 229086 (4RK2/8/5N1p/1Rp2k1P/r2p3Q/br6/2pp2P1/3b4 w - - 0 1)

van Dijk, Johannes

Der Tijd, 1926

4RK2/8/5N1p/1Rp2k1P/r2p3Q/br6/2pp2P1/3b4

#2

7 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rbb4
      • 2.Rxc5#
    • 1...Rab4
      • 2.Rxc5#
    • 1...Bc1
      • 2.Rxc5#
    • 1...Bb2
      • 2.Rxc5#
  • Tries
    • 1.Qe4+?
      • 1...Kxf6
        • 2.Qg6#
        • 2.Qf4#
        • 2.Qe5#
      • 1...Kg5!
    • 1.Qg4+?
      • 1...Kxf6
        • 2.Re6#
        • 2.Qf4#
        • 2.Qg6#
      • 1...Bxg4!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Qf4#
      • 1...c4+
        • 2.Sb4#
      • 1...Bxh5
        • 2.Qxh5#
      • 1...Rf3
        • 2.g4#
      • 1...Bg4
        • 2.Qf6#
      • 1...d3
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • R(e);S_CUTB(d)::R(C),XP(h)
    • R(f);S_CUTB(d)::R(C),XP(h)
    • B(d);N_GUARD::R(C),XP(h)
  • Tries
    • Try
      • Q(B);CHECK
      • Refutation
        • K(i);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • B(a);XQ(B)
  • Actual
    • S(E);N_PINP(h)
    • Threat
      • QAR1(B)
    • Vars
      • P(h);CHECK::R(C)+S(E)
      • B(a);OGATE,XP(D)::QAR2(B),XB(a)
      • R(e);S_CUTB(a)::P(A)
      • B(a);SBLOCK::QAR1(B)
      • P(g);N_GUARD,S_CUTR(e)::S(E)
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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).