MESON Chess Problem Database

Problem Display
PID: 250462 (8/8/3N4/2pkp3/2N5/8/2Q1K3/8 w - - 0 1)

Zujevas, Nikolajus

Uralski Problemist, 2009

8/8/3N4/2pkp3/2N5/8/2Q1K3/8

#2

4 + 3

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qd3#
      • 2.Qd2#
    • 1...e4
      • 2.Qxe4#
  • Tries
    • 1.Qb1?
      • 1...Kd4
        • 2.Qd3#
      • 1...Kc6
        • 2.Qb7#
      • 1...e4
        • 2.Qxe4#
      • 1...Ke6!
    • 1.Qf5?
      • 1...Kd4
        • 2.Qd3#
        • 2.Qxe5#
      • 1...Kc6!
    • 1.Qg6?
      • 1...Kd4
        • 2.Qd3#
      • 1...e4
        • 2.Qxe4#
      • 1...Kc6!
  • Keys
    • 1.Qh7!
      • 1...Kd4
        • 2.Qd3#
      • 1...Kc6
        • 2.Qb7#
      • 1...Ke6
        • 2.Qf7#
      • 1...e4
        • 2.Qxe4#

This anticipates 267422(2013), 257526(2021), 269857(2023)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);::QAB1(A),XP(c)
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR1(A)
        • K(b);N_GUARD,S_FLIGHT::QAB1(A)
        • P(c);::QAB1(A),XP(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);P_PINP(c)
      • Refutation
        • K(b);N_SPINP(c),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR1(A)
        • P(c);::QAB1(A),XP(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);N_GUARD,P-FLIGHT::QAR1(A)
      • K(b);N_GUARD,S_FLIGHT::QAB1(A)
      • P(c);::QAB1(A),XP(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).