MESON Chess Problem Database

Problem Display
PID: 240423 (4k3/3pPp1K/8/2b2N2/2Q5/8/8/8 w - - 0 1)

Libis, Zdenek

1st HM., Sachova skladba, 2020

4k3/3pPp1K/8/2b2N2/2Q5/8/8/8

#2

4 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Qc8#
    • 1...Bf2
      • 2.Qc8#
    • 1...Ba3
      • 2.Qc8#
    • 1...Be3
      • 2.Qc8#
    • 1...Bb4
      • 2.Qc8#
    • 1...Bd4
      • 2.Qc8#
    • 1...Bd6
      • 2.Qc8#
    • 1...Ba7
      • 2.Qc8#
    • 1...d5
      • 2.Qb5#
      • 2.Qa4#
    • 1...d6
      • 2.Qb5#
      • 2.Qa4#
    • 1...f6
      • 2.Qg8#
  • Tries
    • 1.Kg8?
      • threat
        • 2.Qxf7#
      • 1...d5
        • 2.Qb5#
        • 2.Qa4#
      • 1...d6
        • 2.Qb5#
        • 2.Qa4#
      • 1...f6
        • 2.Qf7#
      • 1...Bxe7!
    • 1.Qe2?
      • threat
        • 2.Sg7#
      • 1...Bxe7
        • 2.Qxe7#
      • 1...d5
        • 2.Qb5#
      • 1...d6
        • 2.Qb5#
      • 1...f6
        • 2.Qh5#
      • 1...Bd4
        • 2.Sd6#
      • 1...Be3!
    • 1.Qe4?
      • threat
        • 2.Sg7#
        • 2.Qa8#
      • 1...Bxe7
        • 2.Qxe7#
      • 1...d5
        • 2.Qa4#
      • 1...d6
        • 2.Qc6#
        • 2.Qa4#
      • 1...Bd4
        • 2.Sd6#
        • 2.Qa8#
      • 1...Bb6
        • 2.Sd6#
        • 2.Sg7#
      • 1...Bd6
        • 2.Sxd6#
        • 2.Sg7#
      • 1...Ba7
        • 2.Sd6#
        • 2.Sg7#
      • 1...f6!
    • 1.Qg4?
      • threat
        • 2.Qg8#
      • 1...d5
        • 2.Qa4#
      • 1...d6
        • 2.Qa4#
      • 1...Bxe7!
    • 1.Qxc5?
      • threat
        • 2.Sg7#
        • 2.Qc8#
      • 1...d5
        • 2.Qb5#
        • 2.Qc6#
        • 2.Qc8#
      • 1...d6
        • 2.Qb5#
        • 2.Qc6#
        • 2.Qc8#
      • 1...f6!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Sg7#
      • 1...Bxe7
        • 2.Qxe7#
      • 1...d5
        • 2.Qa4#
      • 1...d6
        • 2.Qa4#
      • 1...f6
        • 2.Qh5#
      • 1...Bd4
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • B(a);OGATE::QAR2(A)
    • P(c);OGATE::QAR2(A)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • QAB1(A),XP(c)
      • Vars
        • P(c);::QAB1(A)
      • Refutation
        • B(a);XP(C)
    • Try
      • Q(A);
      • Threat
        • S(B)
      • Vars
        • B(a);OGATE,P_SPINB(a),XP(C)::QAR1(A),XB(a)
        • P(b);OGATEB::QAB(A)
        • P(c);OGATEB::QAB(A)
        • B(a);N_GUARD::S(B)
      • Refutation
        • B(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);OGATE,P_SPINB(a),XP(C)::QAR1(A),XB(a)
        • P(b);OGATEB::QAB(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • P(b);OGATEB::QAB(A)
      • Refutation
        • B(a);XP(C)
    • Try
      • Q(A);XB(a)
      • Threat
        • DUALS(2)
      • Refutation
        • P(c);
  • Actual
    • Q(A);
    • Threat
      • S(B)
    • Vars
      • B(a);OGATE,XP(C)::QAR1(A),XB(a)
      • P(b);OGATEB::QAB(A)
      • P(c);OGATEB::QAB(A)
      • B(a);N_GUARD::S(B)
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).