MESON Chess Problem Database

Problem Display
PID: 177917 (6NK/3p4/3p4/3B2k1/3P4/2p3Bp/7P/3Q4 w - - 0 1)

Zigalov, Aleksandr

Sahs (Latvia), 1982

6NK/3p4/3p4/3B2k1/3P4/2p3Bp/7P/3Q4

#2

7 + 5

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qh5#
    • 1...Kg6
      • 2.Qg4#
  • Tries
    • 1.Kg7?
      • 1...Kf5
        • 2.Qh5#
      • 1...c2!
    • 1.Kh7?
      • 1...Kf5
        • 2.Qh5#
      • 1...c2!
    • 1.Se7?
      • 1...Kf6
        • 2.Bh4#
      • 1...Kh6
        • 2.Bf4#
      • 1...c2!
    • 1.Bxd6?
      • 1...Kh4
        • 2.Be7#
      • 1...Kf5
        • 2.Qh5#
      • 1...Kg6
        • 2.Qg4#
      • 1...c2!
    • 1.Be6?
      • threat
        • 2.Qg4#
      • 1...Kg6
        • 2.Qg4#
      • 1...dxe6!
    • 1.Qe2?
      • 1...Kf5
        • 2.Qh5#
      • 1...Kg6
        • 2.Qg4#
      • 1...c2!
    • 1.Qf3?
      • 1...Kg6
        • 2.Qg4#
      • 1...c2!
    • 1.Qb1?
      • 1...Kg4
        • 2.Qg6#
      • 1...Kh5
        • 2.Qf5#
      • 1...c2!
    • 1.Qd3?
      • 1...Kg4
        • 2.Qg6#
      • 1...Kh5
        • 2.Qf5#
      • 1...c2!
  • Keys
    • 1.Qc2!
      • 1...Kg4
        • 2.Qg6#
      • 1...Kh5
        • 2.Qf5#

Anticipated by 68798(1956)

This anticipates 200088(1982), 234983(2013)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(c);P-FLIGHT::QAR2(A)
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • K(G);P-FLIGHT
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • S(F);
      • Vars
        • K(c);S_FLIGHT::B(C)
      • Refutation
        • P(a);
    • Try
      • B(C);XP(d)
      • Vars
        • K(c);S_FLIGHT::B(C)
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • B(E);
      • Threat
        • QAR1(A)
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • P(e);XB(E)
    • Try
      • Q(A);
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • P(a);
  • Actual
    • Q(A);
    • Vars
      • K(c);P-FLIGHT::QAR2(A)
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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).