MESON Chess Problem Database

Problem Display
PID: 158423 (8/3k1K2/1Q2N3/3N1P2/2q5/8/8/8 w - - 0 1)

Antipov, Viacheslav Pavlovich

Sa ogneupory, 1986

8/3k1K2/1Q2N3/3N1P2/2q5/8/8/8

#2

5 + 2

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Qc7#
    • 1...Qa2
      • 2.Qc7#
    • 1...Qe2
      • 2.Qc7#
    • 1...Qb3
      • 2.Qc7#
    • 1...Qd3
      • 2.Qc7#
    • 1...Qb5
      • 2.Qc7#
    • 1...Qxd5
      • 2.Qc7#
    • 1...Qa6
      • 2.Qc7#
    • 1...Qa4
      • 2.Qc7#
    • 1...Qb4
      • 2.Qc7#
    • 1...Qd4
      • 2.Qc7#
    • 1...Qe4
      • 2.Qc7#
    • 1...Qg4
      • 2.Qc7#
    • 1...Qh4
      • 2.Qc7#
    • 1...Qc6
      • 2.Qd8#
    • 1...Qc7
      • 2.Qxc7#
    • 1...Qc8
      • 2.Sf6#
  • Tries
    • 1.Sc5+?
      • 1...Kc8
        • 2.Qc7#
      • 1...Qxc5!
    • 1.Qc5?
      • threat
        • 2.Sb6#
        • 2.Sf6#
      • 1...Qxd5
        • 2.Qc7#
      • 1...Qb3
        • 2.Sf6#
        • 2.Qc7#
      • 1...Qb5
        • 2.Sf6#
        • 2.Qc7#
      • 1...Qa6
        • 2.Sf6#
        • 2.Qc7#
      • 1...Qc3
        • 2.Sb6#
      • 1...Qb4
        • 2.Sf6#
        • 2.Qc7#
      • 1...Qd4
        • 2.Sb6#
        • 2.Qc7#
      • 1...Qh4
        • 2.Sb6#
        • 2.Qc7#
      • 1...Qxc5!
    • 1.Qb7+?
      • 1...Qc7
        • 2.Qxc7#
      • 1...Kd6!
  • Keys
    • 1.Se7!
      • threat
        • 2.Qd8#
      • 1...Qxe6+
        • 2.fxe6#
      • 1...Qc7
        • 2.Qxc7#
      • 1...Qc8
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 15
  • Sets
    • Q(a);N_GUARD,P_PINP(B)::QAR1(C)
    • Q(a);N_GUARD::QAR1(C)
    • Q(a);N_GUARD,P_PINS(D),XS(A)::QAR1(C)
    • Q(a);SBLOCK::QAR1(C)
    • Q(a);N_GUARD::QAR1(C),XQ(a)
    • Q(a);SBLOCK::S(A)
  • Tries
    • Try
      • S(D);CHECK,P_SPINS(A)
      • Vars
        • K(b);S_FLIGHT::QAR1(C)
      • Refutation
        • Q(a);N_PINS(A),XS(D)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);N_GUARD,P_PINS(D),XS(A)::QAR1(C)
        • Q(a);::S(A)
      • Refutation
        • Q(a);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAR1(C),XQ(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(A);P_SPINS(D)
    • Threat
      • QAR1(C)
    • Vars
      • Q(a);CHECK,OGATE,XS(D)::P(B),XQ(a)
      • Q(a);N_GUARD,N_PINS(D)::QAR1(C),XQ(a)
      • Q(a);N_GUARD,N_PINS(D)::QAR(C)
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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).