MESON Chess Problem Database

Problem Display
PID: 157661 (8/K7/8/8/2NkbB2/8/4Q3/8 w - - 0 1)

Dikusarov, Andrey Nikolayovich

Sowetski woin, 1961

8/K7/8/8/2NkbB2/8/4Q3/8

#2

4 + 2

15148 Sadier Collection 2016
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sb2?
      • threat
        • 2.Qc4#
      • 1...Kc5
        • 2.Qc4#
      • 1...Kd5
        • 2.Qc4#
      • 1...Bd3
        • 2.Qe5#
      • 1...Bd5
        • 2.Qe3#
      • 1...Kc3!
    • 1.Sd2?
      • threat
        • 2.Qc4#
      • 1...Kc5
        • 2.Qc4#
      • 1...Kd5
        • 2.Qc4#
      • 1...Bd3
        • 2.Qe5#
      • 1...Bd5
        • 2.Qe3#
      • 1...Kc3!
    • 1.Sa3?
      • threat
        • 2.Qc4#
      • 1...Kc5
        • 2.Qc4#
      • 1...Kd5
        • 2.Qc4#
      • 1...Bd3
        • 2.Qe5#
      • 1...Bd5
        • 2.Qe3#
      • 1...Kc3!
    • 1.Sb6?
      • threat
        • 2.Qc4#
        • 2.Qe3#
      • 1...Kc5
        • 2.Qc4#
      • 1...Bd3
        • 2.Qe5#
      • 1...Bd5
        • 2.Qe3#
      • 1...Kc3!
    • 1.Sd6?
      • threat
        • 2.Qc4#
      • 1...Kc5
        • 2.Qc4#
      • 1...Kd5
        • 2.Qc4#
      • 1...Bd3
        • 2.Qe5#
      • 1...Bd5
        • 2.Qe3#
      • 1...Kc3!
  • Keys
    • 1.Sa5!
      • threat
        • 2.Qc4#
      • 1...Kc3
        • 2.Qd2#
      • 1...Kc5
        • 2.Qc4#
      • 1...Kd5
        • 2.Qc4#
      • 1...Bd3
        • 2.Qe5#
      • 1...Bd5
        • 2.Qe3#

Anticipated by 76395(1928), 180955(1953)

This anticipates 186847(2018)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);P-FLIGHT::QAB1(A)
        • B(b);OGATE::QAB1(A)
        • B(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);P-FLIGHT::QAB1(A)
        • B(b);OGATE,SBLOCK::QAB1(A)
        • B(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);P-FLIGHT::QAB1(A)
        • B(b);OGATE,SBLOCK::QAB1(A)
        • B(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • B(b);OGATE,SBLOCK::QAB1(A)
        • B(b);::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);P-FLIGHT::QAB1(A)
        • B(b);OGATE,SBLOCK::QAB1(A)
        • B(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAR1(A)
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);P-FLIGHT::QAB1(A)
      • B(b);OGATE,SBLOCK::QAB1(A)
      • B(b);SBLOCK::QAB1(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).