MESON Chess Problem Database

Problem Display
PID: 96617 (5B2/4Q3/8/6p1/P2kp1P1/1n4P1/1N4B1/3K4 w - - 0 1)

The Hong Oe

Problem (Zagreb), 1958

5B2/4Q3/8/6p1/P2kp1P1/1n4P1/1N4B1/3K4

#2

8 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qd6#
      • 2.Qxe4#
    • 1...Sa1
      • 2.Qc5#
    • 1...Sc1
      • 2.Qc5#
    • 1...Sd2
      • 2.Qc5#
    • 1...Sa5
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...e3
      • 2.Bg7#
      • 2.Qf6#
      • 2.Qg7#
  • Tries
    • 1.Ke1?
      • 1...Ke3
        • 2.Qxe4#
      • 1...Kd5
        • 2.Qd6#
        • 2.Qxe4#
      • 1...Sa1
        • 2.Qc5#
      • 1...Sc1
        • 2.Qc5#
      • 1...Sd2
        • 2.Qc5#
      • 1...Sa5
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...e3
        • 2.Bg7#
        • 2.Qf6#
        • 2.Qg7#
      • 1...Kc3!
    • 1.Bg7+?
      • 1...Kd5
        • 2.Bxe4#
      • 1...Ke3!
    • 1.Qb4+?
      • 1...Kd5
        • 2.Qd6#
        • 2.Qxe4#
      • 1...Ke5
        • 2.Qd6#
      • 1...Ke3!
    • 1.Qf6+?
      • 1...Kd5
        • 2.Qd6#
      • 1...Ke3!
    • 1.Qc7?
      • 1...Kd5
        • 2.Qd6#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sa1
        • 2.Qc5#
      • 1...Sc1
        • 2.Qc5#
      • 1...Sd2
        • 2.Qc5#
      • 1...Sa5
        • 2.Qc5#
      • 1...e3
        • 2.Bg7#
        • 2.Qg7#
      • 1...Ke3!
  • Keys
    • 1.Qa3!
      • 1...Kc3
        • 2.Bg7#
      • 1...Ke3
        • 2.Bc5#
      • 1...Kd5
        • 2.Qd6#
      • 1...Ke5
        • 2.Qd6#
      • 1...Sa1
        • 2.Qc5#
      • 1...Sc1
        • 2.Qc5#
      • 1...Sd2
        • 2.Qc5#
      • 1...Sa5
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...e3
        • 2.Bg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(G)
    • S(a);N_GUARD::QAB1(G),XS(a)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::QAR1(G),XP(c)
        • S(a);N_GUARD::QAB1(G)
        • S(a);N_GUARD::QAB1(G),XS(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(H);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c)::B(C),XP(c)
      • Refutation
        • K(b);P_SPINP(c),S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c)::QAR1(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(G);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c)::QAR1(G)
        • S(a);N_GUARD::QAB1(G),XS(a)
        • S(a);N_GUARD::QAB1(G)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(G);
    • Vars
      • K(b);P_SPINS(a),S_FLIGHT::B(H)
      • K(b);P-FLIGHT,P_SPINP(c)::QAR1(G)
      • K(b);S_FLIGHT::QAB1(G)
      • S(a);N_GUARD::QAB1(G)
      • S(a);N_GUARD::QAB1(G),XS(a)
      • P(c);SBLOCK::B(H)
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).