MESON Chess Problem Database

Problem Display
PID: 91387 (8/1p3R2/1B2Q1p1/4b1p1/K3k3/4n1P1/2p1B3/4n3 w - - 0 1)

Drese, Gerardus Hendrikus

Probleemblad 077. TT, 1949

8/1p3R2/1B2Q1p1/4b1p1/K3k3/4n1P1/2p1B3/4n3

#2

6 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Bf3#
    • 1...Sd5
      • 2.Qxg6#
    • 1...g4
      • 2.Rf4#
  • Tries
    • 1.Qc4+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Sxc4!
    • 1.Qc6+?
      • 1...Sd5
        • 2.Qxg6#
      • 1...bxc6!
  • Keys
    • 1.Rd7!
      • threat
        • 2.Rd4#
      • 1...Sf3
        • 2.Bd3#
      • 1...Sd1
        • 2.Qxg6#
      • 1...Sf1
        • 2.Qxg6#
      • 1...S3g2
        • 2.Qxg6#
      • 1...Sc4
        • 2.Qxg6#
      • 1...Sg4
        • 2.Qxg6#
      • 1...Sd5
        • 2.Qxg6#
      • 1...Sf5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD,SBLOCK::B(A)
    • S(c);N_GUARD,SBLOCK::QAB(E),XP(g)
    • P(f);N_GUARD::R1(F)
  • Tries
    • Try
      • Q(E);CHECK,N_PINB(e)
      • Vars
        • B(e);N_GUARD,P_SPINB(e)::QAR1(E),XB(e)
      • Refutation
        • S(c);XQ(E)
    • Try
      • Q(E);CHECK,N_PINB(e)
      • Vars
        • S(c);N_GUARD,P_SPINS(c),SBLOCK::QAB(E),XP(g)
      • Refutation
        • P(h);XQ(E)
  • Actual
    • R(F);
    • Threat
      • R1(F)
    • Vars
      • S(a);N_GUARD,SBLOCK::B(A)
      • S(c);N_GUARD::QAB(E),XP(g)
      • S(c);N_GUARD,SBLOCK::QAB1(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).