MESON Chess Problem Database

Problem Display
PID: 268928 (8/3R4/8/2N1kp2/3p4/8/7K/5Q2 w - - 0 1)

Alekseev, Yuri Mikhailovich

Shakhmatnaya kompozitsiya, 2022

8/3R4/8/2N1kp2/3p4/8/7K/5Q2

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Kg3?
      • 1...f4+
        • 2.Qxf4#
      • 1...d3
        • 2.Qa1#
      • 1...Kf6!
    • 1.Qe2+?
      • 1...Kf4
        • 2.Se6#
      • 1...Kf6!
    • 1.Qg2?
      • 1...Kf4
        • 2.Qg3#
      • 1...Kf6
        • 2.Qg7#
      • 1...f4
        • 2.Qg5#
      • 1...d3!
    • 1.Qa6?
      • threat
        • 2.Qd6#
      • 1...f4
        • 2.Qe6#
      • 1...Kf4!
    • 1.Qe1+?
      • 1...Kf4
        • 2.Qg3#
      • 1...Kf6!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qxd4#
      • 1...Kf4
        • 2.Qg3#
      • 1...Kf6
        • 2.Qg7#
      • 1...d3
        • 2.Qd4#
      • 1...f4
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • P(c);CHECK::QAB1(A),XP(c)
        • P(a);OGATEB::QAB(A)
      • Refutation
        • K(b);P_SPINP(c),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_GUARD,S_FLIGHT::S(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);N_GUARD,S_CUTP(c),S_FLIGHT::QAB1(A)
        • K(b);N_GUARD,S_FLIGHT::QAB1(A)
        • P(c);OGATEB::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(c);SBLOCK::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_GUARD,S_CUTP(c),S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XP(a)
    • Vars
      • K(b);N_GUARD,S_CUTP(c),S_FLIGHT::QAB1(A)
      • K(b);N_GUARD,S_FLIGHT::QAB1(A)
      • P(a);::QAB1(A)
      • P(c);OGATEB::QAR2(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).