MESON Chess Problem Database

Problem Display
PID: 172058 (bQ3bq1/2r3P1/Rp3R2/3k4/5pN1/2pNPP1n/8/4KB2 w - - 0 1)

Apro, Laszlo

Deutsche Schachzeitung, 1978

bQ3bq1/2r3P1/Rp3R2/3k4/5pN1/2pNPP1n/8/4KB2

#2

10 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.Qe5#
    • 1...Rc5
      • 2.Sb4#
    • 1...Be7
      • 2.Qxg8#
  • Tries
    • 1.Sb4+?
      • 1...Kc5
        • 2.Qxb6#
      • 1...Bxb4!
    • 1.Sxf4+?
      • 1...Kc5
        • 2.Qxb6#
      • 1...Sxf4!
  • Keys
    • 1.Qxb6!
      • threat
        • 2.Qd4#
      • 1...Kc4
        • 2.Sxf4#
      • 1...fxe3
        • 2.Sxe3#
      • 1...Rc4
        • 2.Rf5#
      • 1...Rc5
        • 2.Sb4#
      • 1...Bc5
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(f);OGATE,SBLOCK::QAR1(J)
    • R(f);SBLOCK,S_CUTB(h)::S(C)
    • B(h);OGATE::QAB(J),XQ(i)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB1(J),XP(e)
      • Refutation
        • B(h);XS(C)
    • Try
      • S(C);CHECK,XP(c)
      • Vars
        • K(d);P-FLIGHT::QAB1(J),XP(e)
      • Refutation
        • S(b);XS(C)
  • Actual
    • Q(J);XP(e)
    • Threat
      • QAR1(J)
    • Vars
      • K(d);S_FLIGHT::B(B)+S(C),XP(c)
      • P(c);XP(D)::S(F),XP(c)
      • R(f);SBLOCK::R(H)
      • R(f);S_CUTB(h)::S(C)
      • B(h);S_CUTR(f)::QAB(J)
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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).