MESON Chess Problem Database

Problem Display
PID: 60871 (1B6/8/8/8/4K3/5pN1/3N1Qqk/5B2 w - - 0 1)

Drese, Gerardus Hendrikus

Nieuwsblad van het Noorden, 1933

1B6/8/8/8/4K3/5pN1/3N1Qqk/5B2

#2

6 + 3

5227 Schaak..., maar raak! 1969

SOLUTION

  • SOUND
  • Tries
    • 1.Sh1+?
      • 1...Kh3
        • 2.Qg3#
      • 1...Kxh1!
    • 1.Se2+?
      • 1...Kh3
        • 2.Qg3#
      • 1...Kh1!
    • 1.Sf5+?
      • 1...Kh3
        • 2.Qg3#
        • 2.Qh4#
        • 2.Qxf3#
      • 1...Kh1!
    • 1.Sh5+?
      • 1...Kh3
        • 2.Qg3#
      • 1...Kh1!
  • Keys
    • 1.Qxf3!
      • threat
        • 2.Qxg2#
      • 1...Qxf3+
        • 2.Sxf3#
      • 1...Qe2+
        • 2.Sxe2#
      • 1...Kg1
        • 2.Qxg2#
      • 1...Kh3
        • 2.Sf5#
      • 1...Qxf1
        • 2.Se2#
      • 1...Qxd2
        • 2.Qh1#
      • 1...Qxg3
        • 2.Qg2#
      • 1...Qh1
        • 2.Se2#
        • 2.Qxh1#
      • 1...Qh3
        • 2.Qh1#
      • 1...Qg1
        • 2.Qh5#
      • 1...Qf2
        • 2.Qh1#
        • 2.Qxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);N_SPINQ(a),P-FLIGHT,XS(D)
    • Try
      • S(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);N_SPINQ(a),P-FLIGHT
    • Try
      • S(D);CHECK
      • Refutation
        • K(b);N_SPINQ(a),P-FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);N_SPINQ(a),P-FLIGHT
  • Actual
    • Q(C);N_PINQ(a),P_SPINQ(C),XP(c)
    • Threat
      • QAR1(C),XQ(a)
    • Vars
      • Q(a);CHECK,XQ(C)::S(B),XQ(a)
      • Q(a);CHECK,N_GUARD,N_PINQ(C)::B(F)+S(D),XQ(a)
      • K(b);S_FLIGHT::QAR1(C),XQ(a)
      • K(b);P-FLIGHT,P_SPINQ(a)::QAR(C)+S(D)
      • Q(a);N_GUARD,N_PINQ(C),XB(A)::B(F)+S(D)
      • Q(a);N_PINQ(C),XS(B)::QAR1(C)
      • Q(a);N_PINQ(C),P_SPINQ(a),XS(D)::QAR1(C)
      • Q(a);N_PINQ(C)::QAR1(C)
      • Q(a);N_PINQ(C),SBLOCK::QAR(C)
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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).