MESON Chess Problem Database

Problem Display
PID: 76530 (R2K4/2p1p3/3k4/5Q2/1P6/8/8/8 w - - 0 1)

Butwillo, Brother

The Tablet, 1933

R2K4/2p1p3/3k4/5Q2/1P6/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Ra6#
    • 1...e5
      • 2.Qd7#
    • 1...e6
      • 2.Qc5#
  • Tries
    • 1.Kc8?
      • 1...Kc6
        • 2.Ra6#
        • 2.Qc5#
      • 1...e5
        • 2.Qd7#
      • 1...e6
        • 2.Qc5#
      • 1...c5
        • 2.Ra6#
      • 1...c6!
    • 1.Ra1?
      • 1...e5
        • 2.Qd7#
      • 1...c5
        • 2.Ra6#
      • 1...c6
        • 2.Rd1#
      • 1...e6
        • 2.Qc5#
      • 1...Kc6!
    • 1.Ra2?
      • 1...e5
        • 2.Qd7#
      • 1...c5
        • 2.Ra6#
      • 1...c6
        • 2.Rd2#
      • 1...e6
        • 2.Qc5#
      • 1...Kc6!
    • 1.Ra3?
      • 1...e5
        • 2.Qd7#
      • 1...c5
        • 2.Ra6#
      • 1...c6
        • 2.Rd3#
      • 1...e6
        • 2.Qc5#
      • 1...Kc6!
    • 1.Ra5?
      • threat
        • 2.Qd7#
        • 2.Qd5#
      • 1...c6
        • 2.Qd7#
        • 2.Qe5#
      • 1...c5
        • 2.Ra6#
      • 1...e5
        • 2.Qg6#
        • 2.Qd7#
        • 2.Qf6#
      • 1...e6
        • 2.Qc5#
      • 1...Kc6!
    • 1.Rb8?
      • 1...Kc6
        • 2.Qe6#
        • 2.Qd7#
        • 2.Qc5#
      • 1...e5
        • 2.Qd7#
      • 1...c5
        • 2.Rb6#
      • 1...e6
        • 2.Qc5#
      • 1...c6!
  • Keys
    • 1.Ra7!
      • 1...Kc6
        • 2.Qc5#
      • 1...e5
        • 2.Qd7#
      • 1...c6
        • 2.Rd7#
      • 1...c5
        • 2.Ra6#
      • 1...e6
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD::R(C)
    • P(c);SBLOCK::QAR1(B)
    • P(c);SBLOCK::QAB1(B)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(c);SBLOCK::QAR1(B)
        • P(c);SBLOCK::QAB1(B)
        • P(b);N_GUARD::R(C)
      • Refutation
        • P(b);
    • Try
      • R(C);
      • Vars
        • P(c);SBLOCK::QAR1(B)
        • P(b);N_GUARD::R(C)
        • P(b);SBLOCK::R(C)
        • P(c);SBLOCK::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);
      • Vars
        • P(c);SBLOCK::QAR1(B)
        • P(b);N_GUARD::R(C)
        • P(b);SBLOCK::R(C)
        • P(c);SBLOCK::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);
      • Vars
        • P(c);SBLOCK::QAR1(B)
        • P(b);N_GUARD::R(C)
        • P(b);SBLOCK::R(C)
        • P(c);SBLOCK::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);N_GUARD::R(C)
        • P(c);SBLOCK::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);
      • Vars
        • P(c);SBLOCK::QAR1(B)
        • P(b);N_GUARD::R(C)
        • P(c);SBLOCK::QAB1(B)
      • Refutation
        • P(b);
  • Actual
    • R(C);
    • Vars
      • K(a);P-FLIGHT::QAR1(B)
      • P(c);SBLOCK::QAR1(B)
      • P(b);OGATE,SBLOCK::R1(C)
      • P(b);N_GUARD::R(C)
      • P(c);SBLOCK::QAB1(B)
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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).