MESON Chess Problem Database

Problem Display
PID: 227600 (N4n2/5K2/p1pkBp2/5Q2/p2N4/8/8/B7 w - - 0 1)

van Dijk, Johannes

Grantham Journal, 1926

N4n2/5K2/p1pkBp2/5Q2/p2N4/8/8/B7

#2

6 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qf4#
      • 2.Qd5#
  • Tries
    • 1.Sb3?
      • threat
        • 2.Qd3#
        • 2.Qf4#
        • 2.Qc5#
      • 1...Sxe6
        • 2.Qxe6#
      • 1...c5
        • 2.Qxc5#
        • 2.Qd5#
      • 1...Sg6
        • 2.Qd3#
        • 2.Qc5#
      • 1...Sd7
        • 2.Qd3#
      • 1...axb3!
    • 1.Sb5+?
      • 1...cxb5
        • 2.Qd5#
      • 1...axb5!
    • 1.Sxc6?
      • threat
        • 2.Qd5#
      • 1...Kxc6
        • 2.Qd5#
      • 1...Sxe6!
    • 1.Qa5?
      • threat
        • 2.Sf5#
      • 1...c5
        • 2.Qc7#
      • 1...f5
        • 2.Sxf5#
      • 1...Sxe6!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Sb3#
      • 1...Kc5
        • 2.Qa3#
      • 1...Ke5
        • 2.Se2#
      • 1...Sxe6
        • 2.Sxe6#
      • 1...c5
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(3)
      • Vars
        • S(f);OGATE,XB(D)::QAR1(C),XS(f)
        • S(f);::QAR(C)
      • Refutation
        • P(a);XS(B)
    • Try
      • S(B);CHECK
      • Vars
        • P(c);XS(B)::QAR1(C)
      • Refutation
        • P(b);XS(B)
    • Try
      • S(B);XP(c)
      • Threat
        • QAR1(C)
      • Vars
        • K(d);P-FLIGHT,XS(B)::QAB1(C)
      • Refutation
        • S(f);XB(D)
    • Try
      • Q(C);
      • Threat
        • S(B)
      • Vars
        • P(c);::QAB1(C)
        • P(e);::S(B),XP(e)
      • Refutation
        • S(f);XB(D)
  • Actual
    • Q(C);
    • Threat
      • QAR(C)+S(B)
    • Vars
      • K(d);S_FLIGHT::QAB(C)
      • K(d);S_FLIGHT::B(A)+S(B)
      • S(f);XB(D)::QAR(C)+S(B),XS(f)
      • P(c);SBLOCK::QAB(C)
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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).