MESON Chess Problem Database

Problem Display
PID: 178709 (3N4/8/4p3/3kP3/1Pppp1p1/6B1/5Qp1/6K1 w - - 0 1)

Maleika, Gerhard

3rd HM., Problem Observer Block-Threat Ty., 2009-2010

3N4/8/4p3/3kP3/1Pppp1p1/6B1/5Qp1/6K1

#2

6 + 7

5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Qa2#
    • 1...d3
      • 2.Qc5#
    • 1...e3
      • 2.Qxg2#
  • Tries
    • 1.Kxg2?
      • 1...c3
        • 2.Qa2#
      • 1...d3
        • 2.Qc5#
      • 1...e3!
    • 1.Bh2?
      • 1...c3
        • 2.Qa2#
      • 1...e3
        • 2.Qxg2#
      • 1...d3
        • 2.Qc5#
      • 1...g3!
    • 1.Bf4?
      • 1...c3
        • 2.Qa2#
      • 1...e3
        • 2.Qxg2#
      • 1...d3
        • 2.Qc5#
      • 1...g3!
    • 1.Qa2?
      • threat
        • 2.Qa5#
        • 2.Qa8#
      • 1...e3
        • 2.Qxg2#
        • 2.Qa8#
      • 1...d3!
    • 1.Qb2?
      • 1...c3
        • 2.Qa2#
        • 2.Qb3#
      • 1...e3
        • 2.Qxg2#
      • 1...d3!
    • 1.Qc2?
      • 1...c3
        • 2.Qb3#
        • 2.Qa2#
      • 1...e3
        • 2.Qxg2#
      • 1...d3!
    • 1.Qd2?
      • 1...c3
        • 2.Qa2#
      • 1...e3
        • 2.Qxg2#
      • 1...d3!
    • 1.Qe2?
      • 1...e3
        • 2.Qxg2#
      • 1...c3
        • 2.Qb5#
        • 2.Qa2#
      • 1...d3!
    • 1.Qxg2?
      • 1...c3
        • 2.Qa2#
      • 1...d3!
    • 1.Qf8?
      • threat
        • 2.Qc5#
        • 2.Qd6#
      • 1...c3
        • 2.Qc5#
      • 1...e3!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qxe6#
        • 2.Qb7#
        • 2.Qd7#
      • 1...c3
        • 2.Qxe6#
      • 1...d3
        • 2.Qd7#
      • 1...e3
        • 2.Qb7#

Anticipated by 103974(1936-1937), 179258(1948), 163526(1973)

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB::QAB(B)
    • P(c);OGATE::QAR1(B)
    • P(d);OGATEB::QAB(B),XP(a)
  • Tries
    • Try
      • K(A);P-FLIGHT,XP(a)
      • Vars
        • P(b);OGATEB::QAB(B)
        • P(c);OGATE::QAR1(B)
      • Refutation
        • P(d);
    • Try
      • B(C);
      • Vars
        • P(b);OGATEB::QAB(B)
        • P(d);OGATEB::QAB(B),XP(a)
        • P(c);OGATE::QAR1(B)
      • Refutation
        • P(e);
    • Try
      • B(C);
      • Vars
        • P(b);OGATEB::QAB(B)
        • P(d);OGATEB::QAB(B),XP(a)
        • P(c);OGATE::QAR1(B)
      • Refutation
        • P(e);
    • Try
      • Q(B);P_PINP(b)
      • Threat
        • DUALS(2)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Vars
        • P(d);OGATEB::QAB(B),XP(a)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Vars
        • P(d);OGATEB::QAB(B),XP(a)
      • Refutation
        • P(c);
    • Try
      • Q(B);P_PINP(c)
      • Vars
        • P(b);OGATEB::QAB(B)
        • P(d);OGATEB::QAB(B),XP(a)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Vars
        • P(d);OGATEB::QAB(B),XP(a)
      • Refutation
        • P(c);
    • Try
      • Q(B);P_PINP(d),XP(a)
      • Vars
        • P(b);OGATEB::QAB(B)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR1(B)
      • Refutation
        • P(d);
  • Actual
    • Q(B);P_PINP(g)
    • Threat
      • DUALS(3)
    • Vars
      • P(b);::QAB1(B),XP(g)
      • P(c);::QAR2(B)
      • P(d);::QAB(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).