MESON Chess Problem Database

Problem Display
PID: 275544 (b7/2p1K3/8/8/2QNkPRp/7n/n1PB1b2/3N4 w - - 0 1)

Labai, Zoltan

Svitek, Miroslav

Problemist Ukraini, 2023

b7/2p1K3/8/8/2QNkPRp/7n/n1PB1b2/3N4

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Qd3#
    • 1...Sc1
      • 2.Sc3#
    • 1...Sc3
      • 2.Sxc3#
    • 1...Sb4
      • 2.Sc3#
    • 1...Sg1
      • 2.Sxf2#
    • 1...Sg5
      • 2.Sxf2#
  • Tries
    • 1.Sc6+?
      • 1...Kf3
        • 2.Se5#
      • 1...Kf5
        • 2.Qe6#
      • 1...Bd4!
    • 1.Rg5?
      • threat
        • 2.Re5#
        • 2.Qd3#
      • 1...Bxd4
        • 2.Qd3#
      • 1...Sxf4
        • 2.Sxf2#
      • 1...Sxg5
        • 2.Sxf2#
      • 1...Sc1
        • 2.Sc3#
        • 2.Re5#
      • 1...Sb4
        • 2.Sc3#
        • 2.Re5#
      • 1...Be3!
    • 1.f5+?
      • 1...Ke5
        • 2.Qe6#
      • 1...Sf4!
  • Keys
    • 1.Ke6!
      • threat
        • 2.Qd3#
      • 1...Bd5+
        • 2.Qxd5#
      • 1...Sxf4+
        • 2.Rxf4#
      • 1...Sg5+
        • 2.fxg5#
      • 1...Sc1
        • 2.Sc3#
      • 1...Sb4
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • B(g);SBLOCK::QAB1(D)
    • S(a);N_GUARD::S(A)
    • S(a);N_GUARD::S(A),XS(a)
    • S(c);N_GUARD::S(A),XB(b)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(d);N_GUARD,S_CUTB(b),S_FLIGHT::S(E)
        • K(d);N_GUARD,S_FLIGHT::QAB1(D)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • R(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);P_SPINB(b),XS(E)::QAB1(D)
        • S(c);N_GUARD,XP(F)::S(A),XB(b)
        • S(c);N_GUARD,XR(G)::S(A),XB(b)
      • Refutation
        • B(b);
    • Try
      • P(F);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(D)
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • K(H);P-FLIGHT
    • Threat
      • QAB1(D)
    • Vars
      • B(g);CHECK,N_GUARD::QAB1(D),XB(g)
      • S(c);CHECK,OGATE,P_SPINS(c),XP(F)::R1(G),XS(c)
      • S(c);CHECK,OGATE::R(G)+P(F),XS(c)
      • S(a);N_GUARD::S(A)
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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).