MESON Chess Problem Database

Problem Display
PID: 22563 (4B3/8/8/2pk4/1P3p2/2Q2N2/8/1K6 w - - 0 1)

Hansen, Erik

Helsingfors SK, 1991

4B3/8/8/2pk4/1P3p2/2Q2N2/8/1K6

#2

5 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qe5#
    • 1...Ke6
      • 2.Qe5#
    • 1...cxb4
      • 2.Qc6#
    • 1...c4
      • 2.Qe5#
  • Tries
    • 1.Ka1?
      • 1...Kd6
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...cxb4
        • 2.Qc6#
      • 1...c4
        • 2.Qe5#
      • 1...Ke4!
    • 1.Kc1?
      • 1...Kd6
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...cxb4
        • 2.Qc6#
      • 1...c4
        • 2.Qe5#
      • 1...Ke4!
    • 1.Ka2?
      • 1...Kd6
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...cxb4
        • 2.Qc6#
      • 1...c4
        • 2.Qe5#
      • 1...Ke4!
    • 1.Kb2?
      • 1...Kd6
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...cxb4
        • 2.Qc6#
      • 1...c4
        • 2.Qe5#
      • 1...Ke4!
    • 1.Bb5?
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Qd3#
      • 1...Kd6
        • 2.Qe5#
      • 1...Ke6!
    • 1.Qd4+?
      • 1...Ke6
        • 2.Qe5#
      • 1...cxd4!
    • 1.Qxc5+?
      • 1...Ke6
        • 2.Qe5#
      • 1...Ke4!
    • 1.bxc5?
      • 1...Ke6
        • 2.Qe5#
      • 1...Ke4!
    • 1.b5?
      • 1...Kd6
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...c4
        • 2.Qe5#
      • 1...Ke4!
  • Keys
    • 1.Kc2!
      • 1...Ke4
        • 2.Qd3#
      • 1...Kd6
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...cxb4
        • 2.Qc6#
      • 1...c4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT::QAB1(B)
    • K(c);S_FLIGHT::QAR1(B)
    • P(b);OGATE,XP(D)::QAB1(B)
    • P(b);SBLOCK::QAR1(B)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(c);P-FLIGHT::QAB1(B)
        • K(c);S_FLIGHT::QAR1(B)
        • P(b);OGATE,XP(D)::QAB1(B)
        • P(b);SBLOCK::QAR1(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(c);P-FLIGHT::QAB1(B)
        • K(c);S_FLIGHT::QAR1(B)
        • P(b);OGATE,XP(D)::QAB1(B)
        • P(b);SBLOCK::QAR1(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(c);P-FLIGHT::QAB1(B)
        • K(c);S_FLIGHT::QAR1(B)
        • P(b);OGATE,XP(D)::QAB1(B)
        • P(b);SBLOCK::QAR1(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(c);P-FLIGHT::QAB1(B)
        • K(c);S_FLIGHT::QAR1(B)
        • P(b);OGATE,XP(D)::QAB1(B)
        • P(b);SBLOCK::QAR1(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(E);
      • Threat
        • QAR1(B)
      • Vars
        • K(c);S_FLIGHT::QAB1(B)
        • K(c);P-FLIGHT::QAB1(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR1(B)
      • Refutation
        • P(b);XQ(B)
    • Try
      • Q(B);CHECK,XP(b)
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • P(D);XP(b)
      • Vars
        • K(c);S_FLIGHT::QAR1(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • P(D);
      • Vars
        • K(c);P-FLIGHT::QAB1(B)
        • K(c);S_FLIGHT::QAR1(B)
        • P(b);SBLOCK::QAR1(B)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • K(A);S_FLIGHT
    • Vars
      • K(c);S_FLIGHT::QAB1(B)
      • K(c);P-FLIGHT::QAB1(B)
      • K(c);S_FLIGHT::QAR1(B)
      • P(b);OGATE,XP(D)::QAB1(B)
      • P(b);SBLOCK::QAR1(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).