MESON Chess Problem Database

Problem Display
PID: 173835 (8/4Q3/7B/6pN/4p3/5kP1/8/2N1K2R w K - 0 1)

Borovik, Boris V

Source?, 0000

8/4Q3/7B/6pN/4p3/5kP1/8/2N1K2R

#2

7 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kg2
      • 2.Qxe4#
    • 1...Kg4
      • 2.Qxe4#
    • 1...g4
      • 2.0-0#
  • Tries
    • 1.Qf6+?
      • 1...Kg2
        • 2.Qf1#
      • 1...Ke3
        • 2.Bxg5#
        • 2.Qc3#
        • 2.Qf2#
      • 1...Kg4!
    • 1.Qf8+?
      • 1...Kg2
        • 2.Qf1#
      • 1...Ke3
        • 2.Qf2#
      • 1...Kg4!
    • 1.Qe5?
      • 1...Kg2
        • 2.Qxe4#
      • 1...Ke3
        • 2.Qc3#
      • 1...Kg4
        • 2.Qxe4#
      • 1...g4
        • 2.0-0#
      • 1...e3!
    • 1.Qe6?
      • 1...Kg2
        • 2.Qxe4#
      • 1...e3
        • 2.0-0#
      • 1...g4
        • 2.0-0#
      • 1...Ke3!
    • 1.Qb7?
      • 1...Kg2
        • 2.Qxe4#
      • 1...Kg4
        • 2.Qxe4#
      • 1...g4
        • 2.0-0#
      • 1...Ke3!
    • 1.Qf7+?
      • 1...Kg2
        • 2.Qf1#
      • 1...Ke3
        • 2.Qf2#
      • 1...Kg4!
  • Keys
    • 1.Qb4!
      • 1...Kg2
        • 2.Qxe4#
      • 1...Ke3
        • 2.Qc3#
      • 1...Kg4
        • 2.Qxe4#
      • 1...e3
        • 2.0-0#
      • 1...g4
        • 2.0-0#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB(G),XP(b)
    • K(a);S_FLIGHT::QAR2(G),XP(b)
    • P(c);SBLOCK::0-0
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(G)
        • K(a);OGATE,P-FLIGHT,P_SPINP(c)::QAB1(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);
      • Vars
        • K(a);S_FLIGHT::QAB(G),XP(b)
        • K(a);P-FLIGHT,P_SPINP(b)::QAR2(G)
        • K(a);S_FLIGHT::QAR2(G),XP(b)
        • P(c);SBLOCK::0-0
      • Refutation
        • P(b);
    • Try
      • Q(G);
      • Vars
        • K(a);S_FLIGHT::QAB(G),XP(b)
        • P(b);::0-0
        • P(c);::0-0
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(G);P_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB(G),XP(b)
        • K(a);N_SPINP(b),S_FLIGHT::QAR2(G),XP(b)
        • P(c);SBLOCK::0-0
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT,P_SPINP(c)
    • Try
      • Q(G);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(G)
        • K(a);OGATE,P-FLIGHT,P_SPINP(c)::QAB1(G)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(G);
    • Vars
      • K(a);S_FLIGHT::QAB(G),XP(b)
      • K(a);P-FLIGHT,P_SPINP(c)::QAR2(G)
      • K(a);P_SPINP(b),S_FLIGHT::QAR2(G),XP(b)
      • P(b);SBLOCK::0-0
      • P(c);SBLOCK::0-0
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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).