MESON Chess Problem Database

Problem Display
PID: 193845 (8/8/p7/8/2K5/3N4/kp6/N6Q w - - 0 1)

Marble, Murray

Chess News, 1916

8/8/p7/8/2K5/3N4/kp6/N6Q

#2

4 + 3

5454 Near Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Qg2?
      • threat
        • 2.Qxb2#
      • 1...Kxa1
        • 2.Qxb2#
      • 1...Kb1
        • 2.Qxb2#
      • 1...Ka3!
    • 1.Qh2?
      • threat
        • 2.Qxb2#
      • 1...Kxa1
        • 2.Qxb2#
      • 1...Kb1
        • 2.Qxb2#
      • 1...Ka3!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qxb2#
      • 1...Kxa1
        • 2.Qxb2#
      • 1...Kb1
        • 2.Qxb2#
      • 1...Ka3
        • 2.Qxa6#
        • 2.Qb3#
      • 1...bxa1Q
        • 2.Qb3#
      • 1...bxa1S
        • 2.Qb2#
      • 1...bxa1B
        • 2.Qb3#
      • 1...bxa1R
        • 2.Qb2#
        • 2.Qb3#
      • 1...b1Q
        • 2.Qxa6#
      • 1...b1S
        • 2.Qb2#
      • 1...b1B
        • 2.Qxa6#
        • 2.Qb2#
      • 1...b1R
        • 2.Qxa6#

This anticipates 172222(1996)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);P_PINP(b)
      • Threat
        • QAR1(B),XP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT,XS(A)::QAB1(B),XP(b)
        • K(a);N_SPINP(b),S_FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • Q(B);P_PINP(b)
      • Threat
        • QAR1(B),XP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT,XS(A)::QAB1(B),XP(b)
        • K(a);N_SPINP(b),S_FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XP(b)
    • Vars
      • K(a);P-FLIGHT,XS(A)::QAB1(B),XP(b)
      • K(a);P_SPINP(b),S_FLIGHT::QAR1(B),XP(b)
      • P(b);SBLOCK,XS(A)::QAB1(B)
      • P(b);XS(A)::QAR1(B)
      • P(b);SBLOCK::QAR(B),XP(c)
      • P(b);::QAR1(B)
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).