MESON Chess Problem Database

Problem Display
PID: 189749 (B4n2/6K1/3Q1pb1/2PPp3/4k1pN/4P2q/2PbR3/8 w - - 0 1)

Kuijers, LA

Prize, Budapesti Sakkor, 1912

B4n2/6K1/3Q1pb1/2PPp3/4k1pN/4P2q/2PbR3/8

#2

9 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Se6+
      • 2.dxe6#
  • Tries
    • 1.Qxe5+?
      • 1...fxe5
        • 2.d6#
      • 1...Kxe5!
    • 1.Qa6?
      • threat
        • 2.Qd3#
        • 2.Qc4#
        • 2.d6#
      • 1...Se6+
        • 2.dxe6#
      • 1...Qxe3
        • 2.Qc4#
      • 1...Bxe3
        • 2.Qc4#
        • 2.Qa4#
      • 1...Bc3
        • 2.Qd3#
        • 2.d6#
      • 1...Bf7
        • 2.Qd3#
        • 2.Qc4#
      • 1...Be8
        • 2.Qd3#
        • 2.Qc4#
      • 1...Qxh4!
    • 1.Qe6?
      • threat
        • 2.d6#
      • 1...Sxe6+
        • 2.dxe6#
      • 1...Qxe3
        • 2.Qxg4#
      • 1...Be8
        • 2.Qf5#
      • 1...Bxe3!
  • Keys
    • 1.Qd7!
      • threat
        • 2.d6#
      • 1...Se6+
        • 2.dxe6#
      • 1...Qxe3
        • 2.Qxg4#
      • 1...Bxe3
        • 2.Qa4#
      • 1...Bf7
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(h);CHECK,OGATE::B(I)+P(F),XS(h)
  • Tries
    • Try
      • Q(G);CHECK,XP(e)
      • Vars
        • P(f);SBLOCK,XQ(G)::B(I)+P(F)
      • Refutation
        • K(c);P-FLIGHT,XQ(G)
    • Try
      • Q(G);
      • Threat
        • DUALS(3)
      • Vars
        • S(h);CHECK,OGATE::B(I)+P(F),XS(h)
        • Q(b);P_SPINQ(b),XP(C)::QAR2(G)
      • Refutation
        • Q(b);XS(D)
    • Try
      • Q(G);P_PINP(e)
      • Threat
        • B(I)+P(F)
      • Vars
        • S(h);CHECK,N_SPINP(e),OGATE,XQ(G)::B(I)+P(F),XS(h)
        • Q(b);N_GUARD,P_SPINQ(b),XP(C)::QAR2(G),XP(d)
        • B(g);N_GUARD::QAB1(G)
      • Refutation
        • B(a);P_SPINB(a),XP(C)
  • Actual
    • Q(G);
    • Threat
      • B(I)+P(F)
    • Vars
      • S(h);CHECK,OGATE::B(I)+P(F),XS(h)
      • Q(b);N_GUARD,P_SPINQ(b),XP(C)::QAR2(G),XP(d)
      • B(a);N_GUARD,P_SPINB(a),XP(C)::QAR(G)
      • B(g);N_GUARD::QAB1(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).