MESON Chess Problem Database

Problem Display
PID: 123650 (1B6/8/8/3K4/8/4N1n1/8/Q5bk w - - 0 1)

Anonymous

Source?, 0000

1B6/8/8/3K4/8/4N1n1/8/Q5bk

#2

4 + 3

3713 Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kh2
      • 2.Qh8#
  • Tries
    • 1.Kc4?
      • 1...Kh2
        • 2.Qh8#
      • 1...Sf1
        • 2.Qa8#
      • 1...Se2
        • 2.Qa8#
      • 1...Sf5
        • 2.Qa8#
      • 1...Sh5
        • 2.Qa8#
      • 1...Se4!
    • 1.Kc5?
      • 1...Kh2
        • 2.Qh8#
      • 1...Sf1
        • 2.Qa8#
      • 1...Se2
        • 2.Qa8#
      • 1...Sf5
        • 2.Qa8#
      • 1...Sh5
        • 2.Qa8#
      • 1...Se4+!
    • 1.Ke6?
      • 1...Kh2
        • 2.Qh8#
      • 1...Sf1
        • 2.Qa8#
      • 1...Se2
        • 2.Qa8#
      • 1...Sf5
        • 2.Qa8#
      • 1...Sh5
        • 2.Qa8#
      • 1...Se4!
    • 1.Qd1?
      • 1...Kh2
        • 2.Qh5#
      • 1...Se4
        • 2.Qf3#
      • 1...Sf1
        • 2.Qf3#
      • 1...Sf5
        • 2.Qf3#
      • 1...Sh5
        • 2.Qf3#
      • 1...Se2!
    • 1.Qf1?
      • threat
        • 2.Qg2#
      • 1...Kh2
        • 2.Qg2#
      • 1...Sxf1!
  • Keys
    • 1.Qb1!
      • 1...Kh2
        • 2.Qh7#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sf1
        • 2.Qe4#
      • 1...Se2
        • 2.Qe4#
      • 1...Sf5
        • 2.Qe4#
      • 1...Sh5
        • 2.Qe4#

This anticipates 18947(1959)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINB(a),P-FLIGHT,P_SPINS(c)::QAR(A)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(b);N_SPINB(a),P-FLIGHT,P_SPINS(c)::QAR(A)
        • S(c);N_GUARD,N_SPINB(a)::QAB(A)
        • S(c);N_GUARD::QAB(A)
      • Refutation
        • S(c);
    • Try
      • K(C);P-FLIGHT,P_SPINS(B)
      • Vars
        • K(b);N_SPINB(a),P-FLIGHT,P_SPINS(c)::QAR(A)
        • S(c);N_GUARD,N_SPINB(a)::QAB(A)
        • S(c);N_GUARD::QAB(A)
      • Refutation
        • S(c);CHECK
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(b);N_SPINB(a),P-FLIGHT,P_SPINS(c)::QAR(A)
        • S(c);N_GUARD,N_SPINB(a)::QAB(A)
        • S(c);N_GUARD::QAB(A)
      • Refutation
        • S(c);
    • Try
      • Q(A);
      • Vars
        • K(b);N_SPINB(a),P-FLIGHT,P_SPINS(c)::QAR(A)
        • S(c);::QAB(A)
        • S(c);N_SPINB(a)::QAB(A)
      • Refutation
        • S(c);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(b);N_SPINB(a),P-FLIGHT,P_SPINS(c)::QAR1(A)
      • Refutation
        • S(c);N_SPINB(a),XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(b);N_SPINB(a),P-FLIGHT,P_SPINS(c)::QAR(A)
      • S(c);N_GUARD::QAB(A),XS(c)
      • S(c);N_GUARD,N_SPINB(a)::QAB(A)
      • S(c);N_GUARD::QAB(A)
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).