MESON Chess Problem Database

Problem Display
PID: 99348 (7B/8/5P2/3pkq2/1Q3N1N/2Rppp2/4b3/K5b1 w - - 0 1)

Persa, Istvan

Magyar Sakkelet, 1979

7B/8/5P2/3pkq2/1Q3N1N/2Rppp2/4b3/K5b1

#2

7 + 8

6490 yacpdb 2009
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3
      • 2.f7#
    • 1...Qe6
      • 2.Sfg6#
    • 1...Qd7
      • 2.f7#
    • 1...Bf1
      • 2.Sxf3#
  • Tries
    • 1.Sfg6+?
      • 1...Ke6
        • 2.Qe7#
      • 1...Qxg6!
  • Keys
    • 1.Rxd3!
      • threat
        • 2.Rxd5#
      • 1...Qxd3
        • 2.f7#
      • 1...Qxf4
        • 2.Qe7#
      • 1...Bxd3
        • 2.Sxf3#
      • 1...Qe4
        • 2.Qb8#
      • 1...d4
        • 2.Qxd4#
      • 1...Qe6
        • 2.Sfg6#
      • 1...Qd7
        • 2.f7#

Anticipated by 9478(1904/I), 89393(1918)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(h);N_GUARD::B(G)+P(F)
    • Q(h);N_GUARD,SBLOCK::S(D)
    • B(b);N_GUARD::S(E),XP(e)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(g);P-FLIGHT::QAR1(C)
      • Refutation
        • Q(h);XS(D)
  • Actual
    • R(B);XP(c)
    • Threat
      • R1(B),XP(f)
    • Vars
      • Q(h);N_GUARD,XR(B)::B(G)+P(F)
      • Q(h);N_GUARD,SBLOCK,XS(D)::QAR2(C)
      • B(b);N_GUARD,XR(B)::S(E),XP(e)
      • Q(h);SBLOCK::QAB(C)
      • P(f);::QAB1(C),XP(f)
      • Q(h);N_GUARD,SBLOCK::S(D)
      • Q(h);N_GUARD::B(G)+P(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).