MESON Chess Problem Database

Problem Display
PID: 194096 (K7/5b2/3N4/2n2pp1/2Pk2rB/4R2r/3PP3/6qQ w - - 0 1)

Vendel, V

Stockholm, 1917

K7/5b2/3N4/2n2pp1/2Pk2rB/4R2r/3PP3/6qQ

#2

8 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qf2
      • 2.Qa1#
    • 1...Qh2
      • 2.Qa1#
    • 1...Qa1+
      • 2.Qxa1#
    • 1...Qg3
      • 2.Qa1#
    • 1...Bxc4
      • 2.Sxf5#
    • 1...Bd5+
      • 2.Qxd5#
    • 1...Bh5
      • 2.Qd5#
    • 1...Bg6
      • 2.Qd5#
    • 1...Be8
      • 2.Qd5#
    • 1...Se6
      • 2.Qd5#
  • Keys
    • 1.Bf2!
      • threat
        • 2.Re4#
      • 1...Qa1+
        • 2.Qxa1#
      • 1...Rh8+
        • 2.Qxh8#
      • 1...Bd5+
        • 2.Qxd5#
      • 1...Qxf2
        • 2.Qa1#
      • 1...Rxe3
        • 2.Qh8#
      • 1...Bxc4
        • 2.Sxf5#
      • 1...Re4
        • 2.Rxe4#
      • 1...Se4
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • Q(a);OGATE::QAB(A)
    • Q(a);CHECK,OGATE::QAB(A),XQ(a)
    • B(h);SBLOCK,XP(E)::S(G),XP(f)
    • B(h);CHECK,N_GUARD::QAR1(A),XB(h)
    • B(h);N_GUARD::QAR1(A)
    • S(e);S_CUTB(h)::QAR1(A)
  • Actual
    • B(F);
    • Threat
      • B(F)+R(D),DCHECK
    • Vars
      • Q(a);CHECK,OGATE::QAB(A),XQ(a)
      • R(b);CHECK,OGATE::QAB(A),XR(b)
      • B(h);CHECK,N_GUARD::QAR1(A),XB(h)
      • Q(a);OGATE,XB(F)::QAB(A)
      • R(b);OGATE,P_SPINR(b),XR(D)::QAB(A)
      • B(h);SBLOCK,XP(E)::S(G),XP(f)
      • R(d);::B(F)+R(D),DCHECK,XR(d)
      • S(e);::B(F)+R(D),DCHECK,XS(e)
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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).