MESON Chess Problem Database

Problem Display
PID: 178234 (5Q2/4B3/2p5/8/3kB3/2N5/8/2K5 w - - 0 1)

Melnichuk, Aleksandr Nikolaevich

Shmatov, Vladimir Afanasievich

Vratnica-64, 2007

5Q2/4B3/2p5/8/3kB3/2N5/8/2K5

#2

5 + 2

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Bc5#
    • 1...Ke5
      • 2.Qf6#
  • Tries
    • 1.Bb4?
      • threat
        • 2.Qc5#
      • 1...Ke3
        • 2.Bc5#
      • 1...Ke5
        • 2.Qd6#
      • 1...c5
        • 2.Qxc5#
      • 1...Kc4!
    • 1.Qf1?
      • 1...Kxc3
        • 2.Qd3#
      • 1...Ke3
        • 2.Bc5#
      • 1...Ke5
        • 2.Qf6#
      • 1...c5!
    • 1.Qf6+?
      • 1...Ke3
        • 2.Bc5#
      • 1...Kc4!
    • 1.Qb8?
      • 1...Kxc3
        • 2.Qb4#
      • 1...Ke3
        • 2.Bc5#
      • 1...Kc4
        • 2.Qb4#
      • 1...c5!
    • 1.Qd8+?
      • 1...Kxc3
        • 2.Qd3#
      • 1...Ke3
        • 2.Qd2#
      • 1...Ke5
        • 2.Qd6#
      • 1...Kc4!
  • Keys
    • 1.Ba3!
      • threat
        • 2.Qc5#
      • 1...Kxc3
        • 2.Qb4#
      • 1...Ke3
        • 2.Bc5#
      • 1...Kc4
        • 2.Qb4#
      • 1...Ke5
        • 2.Qd6#
      • 1...c5
        • 2.Qxc5#

Anticipated by 15317(1982), 171328(1994)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::B(D)
    • K(a);S_FLIGHT::QAB1(E)
  • Tries
    • Try
      • B(D);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);S_FLIGHT::B(D)
        • K(a);S_FLIGHT::QAB1(E)
        • P(b);::QAB1(E),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT,XS(B)::QAR1(E)
        • K(a);S_FLIGHT::B(D)
        • K(a);S_FLIGHT::QAB1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::B(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT,XS(B)::QAB1(E)
        • K(a);S_FLIGHT::B(D)
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(B)::QAR1(E)
        • K(a);OGATE,S_FLIGHT::QAB1(E)
        • K(a);S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(D);
    • Threat
      • QAB1(E)
    • Vars
      • K(a);S_FLIGHT,XS(B)::QAB1(E)
      • K(a);S_FLIGHT::B(D)
      • K(a);P-FLIGHT::QAR1(E)
      • K(a);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).