MESON Chess Problem Database

Problem Display
PID: 166159 (7n/8/1QP3p1/7k/8/5NK1/8/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2016

7n/8/1QP3p1/7k/8/5NK1/8/8

#2

4 + 3

5454 Near Snap 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qe3?
      • threat
        • 2.Qg5#
      • 1...g5
        • 2.Qxg5#
      • 1...Sf7!
    • 1.Qd4?
      • threat
        • 2.Qxh8#
        • 2.Qh4#
      • 1...Kh6
        • 2.Qxh8#
      • 1...Sf7
        • 2.Qh4#
      • 1...g5!
    • 1.Qa5+?
      • 1...g5
        • 2.Qxg5#
      • 1...Kh6!
    • 1.Qc5+?
      • 1...g5
        • 2.Qxg5#
      • 1...Kh6!
    • 1.Qb1?
      • threat
        • 2.Qh1#
      • 1...g5
        • 2.Qh7#
      • 1...Kh6!
    • 1.Qb2?
      • threat
        • 2.Qxh8#
        • 2.Qh2#
      • 1...Kh6
        • 2.Qxh8#
      • 1...Sf7
        • 2.Qh2#
      • 1...g5!
    • 1.Qb5+?
      • 1...g5
        • 2.Qxg5#
      • 1...Kh6!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qh4#
        • 2.Qg5#
        • 2.Qxh8#
      • 1...Kh6
        • 2.Qxh8#
      • 1...g5
        • 2.Qxg5#
      • 1...Sf7
        • 2.Qh4#

Anticipated by 164527(2007)

There are these versions: 169247

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • P(b);::QAR1(C),XP(b)
      • Refutation
        • S(c);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(C),XS(c)
        • S(c);::QAR1(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);CHECK
      • Vars
        • P(b);P_SPINP(b)::QAR1(C),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • P(b);P_SPINP(b)::QAR1(C),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR(C)
      • Vars
        • P(b);OGATE::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(C),XS(c)
        • S(c);::QAR(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);CHECK
      • Vars
        • P(b);P_SPINP(b)::QAR1(C),XP(b)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • DUALS(3)
    • Vars
      • K(a);P-FLIGHT::QAR2(C),XS(c)
      • P(b);::QAR1(C),XP(b)
      • S(c);::QAR1(C)
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).