MESON Chess Problem Database

Problem Display
PID: 263833 (4N3/1K6/4p3/3kp3/8/8/1n6/Q5B1 w - - 0 1)

Anonymous

Tijdschrift vd NSB, 1894

4N3/1K6/4p3/3kp3/8/8/1n6/Q5B1

#2

4 + 4

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Sf6+?
      • 1...Kd6
        • 2.Qa3#
      • 1...Kc4!
    • 1.Qa4?
      • threat
        • 2.Qc6#
      • 1...e4
        • 2.Qb5#
        • 2.Qd4#
      • 1...Sxa4!
    • 1.Qa6?
      • threat
        • 2.Sf6#
        • 2.Qc6#
      • 1...e4
        • 2.Qb5#
      • 1...Ke4!
  • Keys
    • 1.Qf1!
      • 1...Ke4
        • 2.Sf6#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...Sc4
        • 2.Qd3#
      • 1...e4
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAB(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);SBLOCK::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);N_GUARD,S_FLIGHT::S(D)
      • S(a);N_GUARD::QAR2(A),XS(a)
      • S(a);N_GUARD::QAR2(A)
      • P(c);SBLOCK::QAR2(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).