MESON Chess Problem Database

Problem Display
PID: 258770 (2bb2N1/5B2/5Bpn/4pkN1/5qRQ/5P2/7p/5R1K w - - 0 1)

Labai, Zoltan

Svitek, Miroslav

2nd Prize, SuperProblem 250. TT, 2021

2bb2N1/5B2/5Bpn/4pkN1/5qRQ/5P2/7p/5R1K

#2

9 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg5
      • 2.Rxg5#
      • 2.Qxg5#
    • 1...Qxf3+
      • 2.Rxf3#
    • 1...Qe4
      • 2.fxe4#
    • 1...Qxg4
      • 2.fxg4#
    • 1...Ba6
      • 2.Be6#
    • 1...Be6
      • 2.Bxe6#
    • 1...Bb7
      • 2.Be6#
    • 1...Bxf6
      • 2.Sxh6#
    • 1...Sxg4
      • 2.fxg4#
    • 1...e4
      • 2.Rxf4#
      • 2.fxe4#
  • Keys
    • 1.Se6!
      • threat
        • 2.Sg7#
      • 1...Qxf3+
        • 2.Rxf3#
      • 1...Qxg4
        • 2.Sxh6#
      • 1...Bxe6
        • 2.Bxg6#
      • 1...Bxf6
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • Q(b);CHECK,OGATE,P_SPINQ(b),XP(C)::R(A),XQ(b)
    • Q(b);OGATE,P_PINP(C)::R(A)+P(C)DCHECK,XQ(b)
    • Q(b);OGATE,XR(D)::R(A)+P(C)DCHECK,XQ(b)
    • B(g);N_GUARD::B(H)
    • B(g);N_GUARD::B(H),XB(g)
    • B(g);N_GUARD,P_PINP(C)::B(H)
    • B(h);SBLOCK,XB(G)::S(I),XS(f)
    • S(f);OGATE,XR(D)::P(C),XS(f)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XP(C)::R(A),XQ(b)
      • Q(b);N_GUARD,XR(D)::S(I),XS(f)
      • B(g);SBLOCK,XS(F)::B(H),XP(e)
      • B(h);OGATE,XB(G)::QAR1(E),XB(h)
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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).