Problem Display
PID: 245852 (B7/7K/8/3N4/3pk3/5N2/5Q2/8 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Shakhmatna misl, 2002

B7/7K/8/3N4/3pk3/5N2/5Q2/8

#2

5 + 2


5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION


  • SOUND
  • Tries
    • 1.Kg6?
      • threat
        • 2.Qe2#
      • 1...d3
        • 2.Qe3#
      • 1...Kd3!
    • 1.Sg1?
      • 1...Kd3
        • 2.Qe2#
      • 1...d3
        • 2.Qf4#
      • 1...Ke5!
    • 1.Sd2+?
      • 1...Ke5
        • 2.Qf6#
      • 1...Kd3!
    • 1.Sxd4?
      • threat
        • 2.Qe3#
      • 1...Ke5
        • 2.Qf4#
      • 1...Kd3!
    • 1.Sg5+?
      • 1...Ke5
        • 2.Qf4#
        • 2.Qf6#
      • 1...Kd3!
    • 1.Se3+?
      • 1...Kd3
        • 2.Qd2#
      • 1...Kf4!
    • 1.Qg3?
      • 1...Kf5
        • 2.Qg6#
      • 1...d3
        • 2.Qf4#
        • 2.Qg4#
      • 1...Kd3!
  • Keys
    • 1.Qg2!
      • 1...Kd3
        • 2.Se5#
      • 1...Kf5
        • 2.Qg6#
      • 1...d3
        • 2.Qg4#

Anticipated by 237314(1968)

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • QAR2(A)
      • Vars
        • P(a);N_GUARD::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(B);
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • P(a);SBLOCK::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(B);XP(a)
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(B);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);S_FLIGHT::S(B)
      • K(b);S_FLIGHT::QAB1(A)
      • P(a);SBLOCK::QAR2(A)


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).