MESON Chess Problem Database

Problem Display
PID: 194960 (8/1p4r1/1p6/qP1N1Q2/2kP4/8/1R2P1Pb/6BK w - - 0 1)

van Dijk, Johannes

De Maasbode, 1918

8/1p4r1/1p6/qP1N1Q2/2kP4/8/1R2P1Pb/6BK

#2

9 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.Sxb6#
    • 1...Qb4
      • 2.Rxb4#
    • 1...Qa1
      • 2.Rb4#
    • 1...Qa2
      • 2.Rb4#
    • 1...Qa6
      • 2.Rb4#
    • 1...Qa7
      • 2.Rb4#
    • 1...Qa8
      • 2.Rb4#
  • Tries
    • 1.Sxb6+?
      • 1...Kc3
        • 2.Qc2#
      • 1...Qxb6!
    • 1.Qc2+?
      • 1...Qc3
        • 2.Sxb6#
      • 1...Kxd5!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qd3#
      • 1...Kxc3
        • 2.Qc2#
      • 1...Qxc3
        • 2.Qe6#
      • 1...Rg3
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(c);N_GUARD,SBLOCK::S(H),XP(d)
    • Q(c);N_GUARD::R1(C),XQ(c)
    • Q(c);N_GUARD,P_PINB(A)::R1(C)
    • Q(c);N_GUARD::R1(C)
  • Tries
    • Try
      • S(H);CHECK,XP(d)
      • Vars
        • K(b);P-FLIGHT::QAR1(I)
      • Refutation
        • Q(c);XS(H)
    • Try
      • Q(I);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::S(H),XP(d)
      • Refutation
        • K(b);S_FLIGHT,XS(H)
  • Actual
    • S(H);
    • Threat
      • QAB1(I)
    • Vars
      • K(b);OGATEB,P-FLIGHT,XS(H)::QAR1(I)
      • Q(c);SBLOCK,XS(H)::QAB(I)
      • R(f);N_GUARD,S_CUTB(a)::QAR(I)
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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).