MESON Chess Problem Database

Problem Display
PID: 200707 (Q7/8/2K5/B2p4/3kN3/8/8/1B6 w - - 0 1)

Shmatov, Vladimir Afanasievich

Zadachi i Etyudi, 2017

Q7/8/2K5/B2p4/3kN3/8/8/1B6

#2

5 + 2

5454 Near Snap 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Kd6?
      • 1...Kc4
        • 2.Qxd5#
      • 1...dxe4
        • 2.Qxe4#
      • 1...Ke3!
    • 1.Bc3+?
      • 1...Kc4
        • 2.Qa2#
        • 2.Qa4#
      • 1...Ke3!
    • 1.Bb6+?
      • 1...Kc4
        • 2.Qa4#
      • 1...Ke5!
    • 1.Qa7+?
      • 1...Kc4
        • 2.Sd2#
      • 1...Ke5!
    • 1.Qd8?
      • 1...Kc4
        • 2.Qxd5#
      • 1...Ke5
        • 2.Qf6#
      • 1...Ke3!
    • 1.Qh8+?
      • 1...Kc4
        • 2.Sd2#
        • 2.Qc3#
      • 1...Ke3!
  • Keys
    • 1.Qf8!
      • 1...Ke3
        • 2.Qf2#
      • 1...Kc4
        • 2.Qb4#
      • 1...Ke5
        • 2.Qf6#
      • 1...dxe4
        • 2.Qc5#

Anticipated by 86880(1966), 196658(1995)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAB1(E),XP(b)
        • P(b);OGATE,XS(B)::QAR1(E),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(C);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAB1(E),XP(b)
        • K(a);N_SPINP(b),S_FLIGHT::QAB1(E)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT::QAB1(E)
      • K(a);P-FLIGHT::QAR1(E)
      • P(b);XS(B)::QAB1(E)
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).