MESON Chess Problem Database

Problem Display
PID: 286750 (8/8/1p6/kp6/N7/3B4/8/Q3K3 w - - 0 1)

de Haas, Bastian Evert

Gaudium, 2014

8/8/1p6/kp6/N7/3B4/8/Q3K3

#2

4 + 3

3713 Snap 2026

SOLUTION

  • SOUND
  • Sets
    • 1...Ka6
      • 2.Sc5#
    • 1...bxa4
      • 2.Qc3#
    • 1...b4
      • 2.Sb2#
      • 2.Sc3#
      • 2.Sc5#
  • Tries
    • 1.Kd1?
      • 1...Ka6
        • 2.Sc5#
      • 1...bxa4
        • 2.Qc3#
      • 1...b4
        • 2.Sb2#
        • 2.Sc3#
        • 2.Sc5#
      • 1...Kb4!
    • 1.Kf1?
      • 1...Ka6
        • 2.Sc5#
      • 1...bxa4
        • 2.Qc3#
        • 2.Qe1#
      • 1...b4
        • 2.Sb2#
        • 2.Sc3#
        • 2.Sc5#
      • 1...Kb4!
    • 1.Kd2?
      • 1...Ka6
        • 2.Sc5#
      • 1...bxa4
        • 2.Qc3#
      • 1...b4
        • 2.Sb2#
        • 2.Sc3#
        • 2.Sc5#
      • 1...Kb4!
    • 1.Ke2?
      • 1...Ka6
        • 2.Sc5#
      • 1...bxa4
        • 2.Qc3#
        • 2.Qe1#
      • 1...b4
        • 2.Sb2#
        • 2.Sc3#
        • 2.Sc5#
      • 1...Kb4!
    • 1.Kf2?
      • 1...Ka6
        • 2.Sc5#
      • 1...bxa4
        • 2.Qc3#
        • 2.Qe1#
      • 1...b4
        • 2.Sb2#
        • 2.Sc3#
        • 2.Sc5#
      • 1...Kb4!
    • 1.Bf1?
      • 1...Ka6
        • 2.Sc5#
      • 1...bxa4
        • 2.Qc3#
      • 1...b4
        • 2.Sb2#
        • 2.Sc3#
        • 2.Sc5#
      • 1...Kb4!
    • 1.Be2?
      • 1...Ka6
        • 2.Sc5#
      • 1...bxa4
        • 2.Qc3#
      • 1...b4
        • 2.Sb2#
        • 2.Sc3#
        • 2.Sc5#
      • 1...Kb4!
    • 1.Qd4?
      • 1...Ka6
        • 2.Qxb6#
      • 1...bxa4
        • 2.Qc3#
      • 1...b4!
    • 1.Qa2?
      • 1...Ka6
        • 2.Sc5#
      • 1...bxa4
        • 2.Qd2#
      • 1...b4
        • 2.Sb2#
        • 2.Sc3#
        • 2.Sc5#
      • 1...Kb4!
    • 1.Qa3?
      • threat
        • 2.Sb2#
        • 2.Sc3#
        • 2.Sc5#
      • 1...Ka6
        • 2.Sc5#
      • 1...bxa4
        • 2.Qc3#
      • 1...b4!
  • Keys
    • 1.Bc2!
      • 1...Kb4
        • 2.Qc3#
      • 1...Ka6
        • 2.Sc5#
      • 1...bxa4
        • 2.Qxa4#
      • 1...b4
        • 2.Sc3#

Anticipated by 105403(1992)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,P-FLIGHT,P_SPINP(b)::QAR(A)+S(D),DCHECK
    • P(b);N_GUARD,P_SPINP(b),SBLOCK,XS(D)::QAB(A)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);N_GUARD,P-FLIGHT,P_SPINP(b)::QAR(A)+S(D),DCHECK
        • P(b);N_GUARD,P_SPINP(b),SBLOCK,XS(D)::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);N_GUARD,P-FLIGHT,P_SPINP(b)::QAR(A)+S(D),DCHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(a);N_GUARD,P-FLIGHT,P_SPINP(b)::QAR(A)+S(D),DCHECK
        • P(b);N_GUARD,P_SPINP(b),SBLOCK,XS(D)::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);N_GUARD,P-FLIGHT,P_SPINP(b)::QAR(A)+S(D),DCHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(a);N_GUARD,P-FLIGHT,P_SPINP(b)::QAR(A)+S(D),DCHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(C);
      • Vars
        • K(a);N_GUARD,P-FLIGHT,P_SPINP(b)::QAR(A)+S(D),DCHECK
        • P(b);N_GUARD,P_SPINP(b),SBLOCK,XS(D)::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(C);
      • Vars
        • K(a);N_GUARD,P-FLIGHT,P_SPINP(b)::QAR(A)+S(D),DCHECK
        • P(b);N_GUARD,P_SPINP(b),SBLOCK,XS(D)::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);N_GUARD,P-FLIGHT,P_SPINP(b)::QAR1(A),XP(c)
        • P(b);N_GUARD,SBLOCK,XS(D)::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • K(a);N_GUARD,P-FLIGHT,P_SPINP(b)::QAR(A)+S(D),DCHECK
        • P(b);N_GUARD,P_SPINP(b),SBLOCK,XS(D)::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::QAR(A)+S(D),DCHECK
        • P(b);N_GUARD,P_SPINP(b),SBLOCK,XS(D)::QAB(A)
      • Refutation
        • P(b);
  • Actual
    • B(C);
    • Vars
      • K(a);N_GUARD,S_CUTP(b),S_FLIGHT::QAB1(A)
      • K(a);N_GUARD,P-FLIGHT::QAR(A)+S(D),DCHECK
      • P(b);OGATE,P_SPINP(b),XS(D)::QAR1(A),XP(b)
      • P(b);SBLOCK::QAR(A)+S(D)
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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).