MESON Chess Problem Database

Problem Display
PID: 27352 (6b1/3K4/8/2pk4/3p4/8/4QN2/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2001

6b1/3K4/8/2pk4/3p4/8/4QN2/8

#2

3 + 4

4883 Still More Fun with Chess Miniatures 2002
136 Problem Observer 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Be6+
      • 2.Qxe6#
    • 1...Bh7
      • 2.Qe6#
    • 1...d3
      • 2.Qe4#
    • 1...c4
      • 2.Qh5#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Sf4#
      • 1...Be6+
        • 2.Qxe6#
      • 1...c4
        • 2.Qf3#
        • 2.Qg2#
        • 2.Qe5#
      • 1...Kc4!
    • 1.Qf3+?
      • 1...Ke5
        • 2.Sd3#
        • 2.Sg4#
      • 1...Kc4!
    • 1.Qa2+?
      • 1...c4
        • 2.Qa5#
      • 1...Ke5!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Sf6#
      • 1...Be6+
        • 2.Qxe6#
      • 1...d3
        • 2.Qxd3#
      • 1...c4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • B(d);CHECK,N_GUARD::QAB1(A),XB(d)
    • B(d);N_GUARD::QAB1(A)
    • P(a);::QAB1(A)
    • P(b);SBLOCK::QAR(A)
  • Tries
    • Try
      • S(B);
      • Threat
        • S(B)
      • Vars
        • B(d);CHECK,N_GUARD::QAB1(A),XB(d)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • P(b);OGATEB,P_SPINP(b),SBLOCK::QAR(A)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • B(d);CHECK,N_GUARD::QAB1(A),XB(d)
      • P(a);OGATEB::QAR2(A),XP(a)
      • P(b);SBLOCK::QAR1(A)
HTML5 logo

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).