MESON Chess Problem Database

Problem Display
PID: 228665 (8/4q2b/2R2pn1/3pk2p/3N2pr/2N1KPPr/7p/BBQ5 w - - 0 1)

Labai, Zoltan

Svitek, Miroslav

Troll, 2020

8/4q2b/2R2pn1/3pk2p/3N2pr/2N1KPPr/7p/BBQ5

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Re6#
    • 1...Qb4
      • 2.Re6#
    • 1...Qc5
      • 2.Re6#
    • 1...Qd8
      • 2.Re6#
    • 1...Qf8
      • 2.Re6#
    • 1...Qe6
      • 2.Rxe6#
    • 1...Qa7
      • 2.Re6#
    • 1...Qb7
      • 2.Re6#
    • 1...Qc7
      • 2.Re6#
    • 1...Qg7
      • 2.Re6#
    • 1...Sf4
      • 2.gxf4#
    • 1...Sf8
      • 2.f4#
    • 1...Sh8
      • 2.f4#
    • 1...gxf3
      • 2.Sxf3#
  • Tries
    • 1.Kf2?
      • threat
        • 2.Qe3#
      • 1...Kxd4
        • 2.Sd1#
        • 2.Sa2#
        • 2.Se2#
        • 2.Sa4#
        • 2.Se4#
        • 2.Sb5#
      • 1...gxf3
        • 2.Sxf3#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sf8
        • 2.Qf4#
      • 1...Sh8
        • 2.Qf4#
      • 1...h1S+!
    • 1.Bxg6?
      • threat
        • 2.f4#
      • 1...gxf3
        • 2.Sxf3#
      • 1...Rxg3!
    • 1.Qc2?
      • threat
        • 2.Qf5#
      • 1...Qe6
        • 2.Rxe6#
      • 1...Sf4
        • 2.gxf4#
      • 1...Sf8
        • 2.f4#
      • 1...Sh8
        • 2.f4#
      • 1...f5
        • 2.Qxf5#
      • 1...Qd7!
  • Keys
    • 1.Ke2!
      • threat
        • 2.Qe3#
      • 1...Kxd4+
        • 2.Se4#
      • 1...Sf4+
        • 2.Qxf4#
      • 1...gxf3+
        • 2.Sxf3#
      • 1...Sf8
        • 2.Qf4#
      • 1...Sh8
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • Q(j);N_GUARD,P_PINS(D)::R1(I)
    • Q(j);N_GUARD::R1(I)
    • Q(j);N_GUARD,P_PINS(H)::R1(I)
    • Q(j);N_GUARD::R1(I),XQ(j)
    • S(i);OGATE::P(G),XS(i)
    • S(i);N_GUARD::P(F)
    • P(c);XP(F)::S(H),XP(c)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Threat
        • QAR2(C)
      • Vars
        • P(c);XP(F)::S(H),XP(c)
        • S(i);N_GUARD::QAB1(C),XS(i)
        • S(i);N_GUARD::QAB1(C)
      • Refutation
        • P(a);CHECK
    • Try
      • B(B);XS(i)
      • Threat
        • P(F)
      • Vars
        • P(c);XP(F)::S(H),XP(c)
      • Refutation
        • R(b);P_PINP(F),XP(G)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • Q(j);N_GUARD::R1(I),XQ(j)
        • S(i);OGATE::P(G),XS(i)
        • S(i);N_GUARD::P(F)
        • P(h);::QAR1(C),XP(h)
      • Refutation
        • Q(j);
  • Actual
    • K(E);P-FLIGHT
    • Threat
      • QAR2(C)
    • Vars
      • K(f);CHECK,S_FLIGHT,XS(H)::B(A)+S(D)
      • S(i);CHECK,N_GUARD::QAB1(C),XS(i)
      • P(c);CHECK,XP(F)::S(H),XP(c)
      • S(i);N_GUARD::QAB1(C)
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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).