MESON Chess Problem Database

Problem Display
PID: 125602 (7K/3Qp3/2p5/B1kn1n1R/R1Bp4/P1p5/8/4r1b1 w - - 0 1)

Groeneveld, Cornelis

Boletim da UBP, 1984

7K/3Qp3/2p5/B1kn1n1R/R1Bp4/P1p5/8/4r1b1

#2

7 + 9

6490 yacpdb 2009
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sde3
      • 2.Qxe7#
    • 1...Sfe3
      • 2.Qxe7#
    • 1...Sd6
      • 2.Qa7#
  • Tries
    • 1.Bb6+?
      • 1...Kxb6
        • 2.Qa7#
      • 1...Sxb6!
  • Keys
    • 1.Ba6!
      • threat
        • 2.Rc4#
      • 1...Sde3
        • 2.Qxd4#
      • 1...Sb4
        • 2.axb4#
      • 1...Sb6
        • 2.Bb4#
      • 1...Sfe3
        • 2.Qxe7#
      • 1...Sd6
        • 2.Qa7#

Anticipated by 64381(1921)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(f);N_GUARD,P_SPINS(g),S_CUTR(a)::QAB(F),XP(i)
    • S(g);N_GUARD,P_SPINS(f),S_CUTR(a)::QAB(F),XP(i)
    • S(g);P_SPINS(f),SBLOCK::QAB(F)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(e);S_FLIGHT,XB(D)::QAB1(F)
      • Refutation
        • S(f);P_SPINS(g),XB(D)
  • Actual
    • B(C);
    • Threat
      • R1(B)
    • Vars
      • S(f);OGATE,P_SPINS(g)::QAB1(F),XP(d)
      • S(f);OGATE,P_SPINS(g)::P(A),XS(f)
      • S(f);N_GUARD,P_SPINS(g),SBLOCK::B(D)
      • S(g);N_GUARD,P_SPINS(f),S_CUTR(a)::QAB(F),XP(i)
      • S(g);P_SPINS(f),SBLOCK::QAB(F)
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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).