MESON Chess Problem Database

Problem Display
PID: 21960 (6B1/B5Q1/p2p4/P2N3R/1pk5/8/8/1K6 w - - 0 1)

Sendoval, A

Hull Times, 1922

6B1/B5Q1/p2p4/P2N3R/1pk5/8/8/1K6

#2

7 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Sc3+?
      • 1...Kd3
        • 2.Qd4#
      • 1...d5!
    • 1.Qb2?
      • 1...Kd3
        • 2.Qc2#
      • 1...b3
        • 2.Qe2#
      • 1...Kb5!
    • 1.Qd4+?
      • 1...Kb3
        • 2.Qxb4#
      • 1...Kb5!
    • 1.Qb7?
      • 1...Kb3
        • 2.Qxb4#
      • 1...b3
        • 2.Qxa6#
      • 1...Kd3!
    • 1.Qc7+?
      • 1...Kd3
        • 2.Qc2#
      • 1...Kb5
        • 2.Sc3#
      • 1...Kb3!
  • Keys
    • 1.Qg2!
      • 1...Kb3
        • 2.Qa2#
      • 1...Kd3
        • 2.Qc2#
      • 1...Kb5
        • 2.Sc3#
      • 1...b3
        • 2.Qf1#
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(F)
      • Refutation
        • P(d);P_SPINP(d)
    • Try
      • Q(F);
      • Vars
        • K(b);S_FLIGHT::QAB1(F)
        • P(a);SBLOCK::QAB(F)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(F),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAR1(F),XP(a)
        • P(a);SBLOCK::QAB(F),XP(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(F)
        • K(b);S_FLIGHT::R(D)+S(C),DCHECK
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(b);S_FLIGHT::QAB1(F)
      • K(b);S_FLIGHT::R(D)+S(C),DCHECK
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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).