MESON Chess Problem Database

Problem Display
PID: 278440 (4r3/1N2RR2/4q3/3r4/p1pkP3/8/KN1P1PpB/1Q6 w - - 0 1)

Labai, Zoltan

Svitek, Miroslav

Pat a Mat, 2018

4r3/1N2RR2/4q3/3r4/p1pkP3/8/KN1P1PpB/1Q6

#2

10 + 7

15601 Albrecht-Leiss-Degener Collection 2024
5454 Near Snap 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Qxe4#
    • 1...c3
      • 2.Qd3#
  • Tries
    • 1.Qg1?
      • threat
        • 2.f3#
      • 1...Kxe4
        • 2.f3#
      • 1...Qh6
        • 2.f4#
      • 1...Qxe4!
    • 1.f3?
      • threat
        • 2.Qg1#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...g1Q
        • 2.Qxg1#
      • 1...g1S
        • 2.Qxg1#
      • 1...g1B
        • 2.Qxg1#
      • 1...g1R
        • 2.Qxg1#
      • 1...Qh6!
    • 1.f4?
      • threat
        • 2.Bg1#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...g1Q
        • 2.Bxg1#
      • 1...g1S
        • 2.Bxg1#
      • 1...g1B
        • 2.Bxg1#
      • 1...g1R
        • 2.Bxg1#
      • 1...Qh3!
  • Keys
    • 1.Bg1!
      • threat
        • 2.f4#
      • 1...Ke5
        • 2.f4#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...Qh3
        • 2.f3#

Anticipated by 242251(1978)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(f);OGATE,XP(G)::QAR1(A),XQ(f)
    • P(c);N_GUARD::QAR1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)+P(E)
      • Vars
        • K(d);P-FLIGHT,P_SPINQ(f),XP(G)::P(E)
        • Q(f);::QAB(A)+P(E)
      • Refutation
        • Q(f);XP(G)
    • Try
      • P(E);
      • Threat
        • QAB(A)
      • Vars
        • Q(f);OGATE,XP(G)::QAR1(A),XQ(f)
        • P(a);::QAB(A),XQ(a)
        • P(a);::QAB(A),XS(a)
        • P(a);::QAB(A),XB(a)
        • P(a);::QAB(A),XR(a)
      • Refutation
        • Q(f);
    • Try
      • P(E);
      • Threat
        • B(F)
      • Vars
        • Q(f);OGATE,XP(G)::QAR1(A),XQ(f)
        • P(a);::B(F),XQ(a)
        • P(a);::B(F),XS(a)
        • P(a);::B(F),XB(a)
        • P(a);::B(F),XR(a)
      • Refutation
        • Q(f);
  • Actual
    • B(F);
    • Threat
      • B(F)+P(E)
    • Vars
      • K(d);P_SPINQ(f),S_FLIGHT::P(E)
      • Q(f);OGATE,XP(G)::QAR1(A),XQ(f)
      • Q(f);::B(F)+P(E)
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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).