MESON Chess Problem Database

Problem Display
PID: 93280 (7B/8/8/8/K1k5/2p1bB2/6Q1/8 w - - 0 1)

Lokker, Miklosh S

Skakbladet, 1966

7B/8/8/8/K1k5/2p1bB2/6Q1/8

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qe2#
    • 1...Bc5
      • 2.Be2#
      • 2.Qf1#
      • 2.Qe2#
    • 1...c2
      • 2.Qxc2#
  • Tries
    • 1.Bb7?
      • threat
        • 2.Qd5#
      • 1...Kd3
        • 2.Ba6#
      • 1...Kc5
        • 2.Qc6#
      • 1...Bd4!
    • 1.Qa2+?
      • 1...Kd3
        • 2.Qe2#
      • 1...Kc5!
    • 1.Qb2?
      • threat
        • 2.Qxc3#
        • 2.Qb5#
      • 1...Kd3
        • 2.Qxc3#
        • 2.Qe2#
      • 1...Kc5
        • 2.Qb4#
      • 1...Bd4
        • 2.Qb5#
      • 1...Bd2
        • 2.Qb5#
      • 1...c2
        • 2.Qc3#
        • 2.Qxc2#
        • 2.Qb5#
      • 1...cxb2!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qxc3#
      • 1...Kd3
        • 2.Qxc3#
      • 1...Kc5
        • 2.Qc7#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Bd2
        • 2.Qd4#
      • 1...c2
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAB1(A)
    • P(a);OGATEB::QAR2(A),XP(a)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);S_FLIGHT::B(B)
        • K(c);P-FLIGHT::QAR1(A)
      • Refutation
        • B(b);
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAB1(A)
        • B(b);::QAB1(A)
      • Refutation
        • P(a);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(a)
    • Vars
      • K(c);S_FLIGHT::QAR1(A),XP(a)
      • K(c);P-FLIGHT::QAR2(A)
      • B(b);N_GUARD::QAR1(A),XB(b)
      • B(b);N_GUARD::QAR1(A)
      • P(a);::QAR1(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).