MESON Chess Problem Database

Problem Display
PID: 267422 (8/3Q4/3N4/3kp3/8/B7/2P5/6K1 w - - 0 1)

Chernikh, Vassily

Zadachi i Etyudi, 2013

8/3Q4/3N4/3kp3/8/B7/2P5/6K1

#2

5 + 2

5454 Near Snap 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Sc4+?
      • 1...Kxc4
        • 2.Qd3#
      • 1...Ke4!
    • 1.Se4+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Kxe4!
    • 1.Sb5+?
      • 1...Kc4
        • 2.Qc6#
        • 2.Qd3#
      • 1...Ke4!
    • 1.Sf5+?
      • 1...Kc4
        • 2.Qc6#
        • 2.Qd3#
      • 1...Ke4!
    • 1.Sb7+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Ke4!
    • 1.Sf7+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Ke4!
    • 1.Sc8+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Ke4!
    • 1.Se8+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Ke4!
    • 1.Qa4?
      • threat
        • 2.Qc4#
      • 1...e4
        • 2.Qxe4#
      • 1...Ke6!
    • 1.Qg4?
      • threat
        • 2.Qc4#
      • 1...e4
        • 2.Qxe4#
      • 1...Kc6!
    • 1.Qb5+?
      • 1...Kd4
        • 2.Qd3#
        • 2.Qc5#
      • 1...Ke6!
    • 1.Qf5?
      • 1...Kd4
        • 2.Qd3#
      • 1...Kc6!
    • 1.Qc8?
      • threat
        • 2.Qc4#
      • 1...Kd4
        • 2.Qc5#
      • 1...e4!
    • 1.Qe8?
      • 1...e4
        • 2.Qxe4#
      • 1...Kd4!
    • 1.Qa7?
      • 1...Kc6
        • 2.Qb7#
      • 1...Ke6
        • 2.Qf7#
      • 1...e4!
    • 1.Qb7+?
      • 1...Ke6
        • 2.Qf7#
      • 1...Kd4!
    • 1.Qc7?
      • threat
        • 2.Qc4#
      • 1...Kd4
        • 2.Qc5#
      • 1...Ke6
        • 2.Qf7#
      • 1...e4!
    • 1.Qe7?
      • 1...Kc6
        • 2.Qb7#
      • 1...e4
        • 2.Qxe4#
      • 1...Kd4!
    • 1.Qf7+?
      • 1...Kc6
        • 2.Qb7#
      • 1...Kd4!
  • Keys
    • 1.Qh7!
      • 1...Kd4
        • 2.Qd3#
      • 1...Kc6
        • 2.Qb7#
      • 1...Ke6
        • 2.Qf7#
      • 1...e4
        • 2.Qxe4#

Anticipated by 250462(2009)

This anticipates 257526(2021), 269857(2023)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(D)::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • S(D);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • P(b);::QAB1(E),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • P(b);::QAB1(E),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);P_PINP(b)
      • Vars
        • K(a);N_GUARD,N_SPINP(b),P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAB1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);
      • Vars
        • P(b);OGATE::QAB1(E),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAB1(E)
        • K(a);N_GUARD,S_FLIGHT::QAB1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(E)
        • P(b);OGATE::QAB1(E),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);N_GUARD,P-FLIGHT::QAR1(E)
      • K(a);N_GUARD,S_FLIGHT::QAB1(E)
      • P(b);::QAB1(E),XP(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).