MESON Chess Problem Database

Problem Display
PID: 873 (8/5Q1K/3p4/4p3/4k3/8/8/2B2B2 w - - 0 1)

Lincoln, Robert A

British Chess Magazine, 1993

8/5Q1K/3p4/4p3/4k3/8/8/2B2B2

#2

4 + 3

2838 Fun with Chess Miniatures 1996
3713 Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qc4#
  • Tries
    • 1.Kg6?
      • 1...Kd4
        • 2.Qc4#
      • 1...d5!
    • 1.Kh6?
      • 1...Kd4
        • 2.Qc4#
      • 1...d5!
    • 1.Kg7?
      • 1...Kd4
        • 2.Qc4#
      • 1...d5!
    • 1.Kg8?
      • 1...Kd4
        • 2.Qc4#
      • 1...d5!
    • 1.Kh8?
      • 1...Kd4
        • 2.Qc4#
      • 1...d5!
    • 1.Bd2?
      • 1...Kd4
        • 2.Qc4#
      • 1...d5!
    • 1.Bg5?
      • 1...Kd4
        • 2.Qc4#
      • 1...d5!
    • 1.Bh6?
      • 1...Kd4
        • 2.Qc4#
      • 1...d5!
    • 1.Be2?
      • 1...Kd4
        • 2.Qc4#
      • 1...d5!
    • 1.Bd3+?
      • 1...Kd4
        • 2.Qc4#
      • 1...Kxd3!
    • 1.Bb5?
      • 1...Kd4
        • 2.Qc4#
      • 1...d5!
    • 1.Ba6?
      • 1...Kd4
        • 2.Qc4#
      • 1...d5!
    • 1.Qb3?
      • threat
        • 2.Qd3#
      • 1...Kd4
        • 2.Qc4#
      • 1...Kf5!
    • 1.Qe6?
      • 1...Kd4
        • 2.Qc4#
      • 1...d5
        • 2.Qg4#
      • 1...Kf3!
    • 1.Qf4+?
      • 1...Kd5
        • 2.Qc4#
      • 1...exf4!
  • Keys
    • 1.Qg8!
      • 1...Kf3
        • 2.Qg2#
      • 1...Kd4
        • 2.Qc4#
      • 1...Kf5
        • 2.Qg6#
      • 1...d5
        • 2.Qg4#

Anticipated by 142477(1967)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR1(C)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • K(D);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • B(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • B(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • B(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • B(B);
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • B(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT,XB(B)
    • Try
      • B(B);
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • B(B);
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR1(C)
        • P(c);SBLOCK::QAR2(C)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(C)
      • Refutation
        • P(b);XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT::QAB1(C)
      • K(a);P-FLIGHT::QAR1(C)
      • P(c);SBLOCK::QAR2(C)
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).