MESON Chess Problem Database

Problem Display
PID: 271047 (3nB3/pR6/3p2Q1/2pkprN1/3B4/6P1/2KN1P1p/3R4 w - - 0 1)

van Dijk, Nico

Schakend Nederland, 1964

3nB3/pR6/3p2Q1/2pkprN1/3B4/6P1/2KN1P1p/3R4

#2

10 + 8

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qxd6#
    • 1...Rxf2
      • 2.Qe4#
    • 1...Rf3
      • 2.Qe4#
    • 1...Rf6
      • 2.Qe4#
    • 1...Rf7
      • 2.Qe4#
    • 1...Rf8
      • 2.Qe4#
    • 1...cxd4
      • 2.Rb5#
    • 1...exd4
      • 2.Qxf5#
  • Tries
    • 1.Qe6+?
      • 1...Kxd4
        • 2.Sb1#
        • 2.Sf1#
        • 2.Sb3#
        • 2.Sdf3#
        • 2.Sc4#
        • 2.Sde4#
        • 2.Qc4#
        • 2.Qxd6#
      • 1...Sxe6!
  • Keys
    • 1.Bxe5!
      • threat
        • 2.Qxd6#
      • 1...Kxe5
        • 2.Sc4#
      • 1...Rxe5
        • 2.Qd3#
      • 1...Sxb7
        • 2.Qe6#
      • 1...dxe5
        • 2.Rd7#
      • 1...Rf6
        • 2.Qe4#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sf7
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 7
  • Sets
    • K(c);N_GUARD,P-FLIGHT,XB(F)::QAR2(H),XP(f)
    • R(e);OGATE,P_PINS(C),XP(D)::QAB1(H)
    • R(e);OGATE::QAB1(H)
    • P(b);OGATEB,SBLOCK,XB(F)::R(I)
    • P(d);OGATEB,SBLOCK,XB(F)::QAR2(H),XR(e)
  • Tries
    • Try
      • Q(H);CHECK
      • Refutation
        • S(h);XQ(H)
  • Actual
    • B(F);XP(d)
    • Threat
      • QAR1(H),XP(f)
    • Vars
      • K(c);N_GUARD,P-FLIGHT,XB(F)::S(C)
      • R(e);OGATE,SBLOCK,XB(F)::QAR2(H)
      • S(h);N_GUARD,XR(I)::QAB1(H)
      • P(f);OGATEB,SBLOCK,XB(F)::R(I)
      • R(e);OGATE::QAB1(H)
      • S(h);N_GUARD::QAB1(H),XS(h)
      • S(h);N_GUARD::QAB1(H)
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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).