MESON Chess Problem Database

Problem Display
PID: 182320 (q1b3Q1/2B5/8/1p3N1K/3Nk3/3p4/6Pp/1B5r w - - 0 1)

Schuld, Henk L

5th HM., Hampstead and Highgate Express, 1906

q1b3Q1/2B5/8/1p3N1K/3Nk3/3p4/6Pp/1B5r

#2

7 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Qg4#
    • 1...Ba6
      • 2.Qe6#
    • 1...Be6
      • 2.Qxe6#
    • 1...Bb7
      • 2.Qe6#
  • Tries
    • 1.Se2?
      • threat
        • 2.Seg3#
      • 1...Kxf5
        • 2.Qg6#
      • 1...Be6
        • 2.Qxe6#
      • 1...Bxf5!
    • 1.Qg3?
      • threat
        • 2.Qe5#
        • 2.Qf3#
      • 1...Bxf5
        • 2.Qe5#
      • 1...Qd5
        • 2.Bxd3#
        • 2.Qf4#
        • 2.Qh4#
        • 2.Qxd3#
        • 2.Qe3#
        • 2.Qf3#
        • 2.Qg4#
      • 1...Rf1
        • 2.Qe5#
      • 1...Kd5!
    • 1.Qg7?
      • threat
        • 2.Qe5#
      • 1...Qd5
        • 2.Qg4#
      • 1...Kd5!
    • 1.Qe8+?
      • 1...Be6
        • 2.Qxe6#
      • 1...Kd5!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Sg3#
      • 1...Kxf5
        • 2.Qg6#
      • 1...Bxf5
        • 2.Qxa8#
      • 1...dxc2
        • 2.Bxc2#
      • 1...Be6
        • 2.Qxe6#
      • 1...d2
        • 2.Se1#
      • 1...Qd5
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(f);P_PINS(D),SBLOCK::QAR2(G)
    • B(g);N_GUARD::QAR2(G)
    • B(g);N_GUARD::QAR2(G),XB(g)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(D)::QAB1(G)
        • B(g);N_GUARD::QAR2(G),XB(g)
      • Refutation
        • B(g);XS(D)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(g);XS(D)::QAR1(G)
        • R(a);::QAR1(G)
      • Refutation
        • K(d);N_SPINP(c),S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • Q(f);P_PINS(D),SBLOCK::QAR2(G)
      • Refutation
        • K(d);N_SPINP(c),S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAR2(G),XB(g)
      • Refutation
        • K(d);N_SPINP(c),S_FLIGHT
  • Actual
    • S(C);N_PINP(c)
    • Threat
      • S(D)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(D)::QAB1(G)
      • B(g);OGATE,SBLOCK,XS(D)::QAB(G),XQ(f)
      • P(c);OGATE,P_SPINP(c),XS(C)::B(A),XP(c)
      • B(g);N_GUARD::QAR2(G),XB(g)
      • P(c);::B(A)+S(C)
      • Q(f);P_PINS(D),SBLOCK::QAR2(G)
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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).