MESON Chess Problem Database

Problem Display
PID: 229315 (q7/1B2N1pR/1pP1p3/p3p3/r3kP2/1QPp3K/2b1pRN1/8 w - - 0 1)

Labai, Zoltan

Zamanov, Vidadi

The Macedonian Problemist, 2020

q7/1B2N1pR/1pP1p3/p3p3/r3kP2/1QPp3K/2b1pRN1/8

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qf8
      • 2.c7#
    • 1...Qg8
      • 2.c7#
    • 1...Qh8
      • 2.c7#
    • 1...Ra1
      • 2.Qc4#
    • 1...Ra2
      • 2.Qc4#
    • 1...Ra3
      • 2.Qc4#
    • 1...Rc4
      • 2.Qxc4#
    • 1...Bb1
      • 2.Qxa4#
    • 1...d2
      • 2.Qxc2#
    • 1...exf4
      • 2.Qxe6#
  • Tries
    • 1.Qxe6?
      • threat
        • 2.Qd5#
        • 2.Qf5#
        • 2.Qxe5#
        • 2.Qg6#
      • 1...d2
        • 2.Qd5#
        • 2.Qf5#
        • 2.Qg6#
      • 1...Qb8
        • 2.Qd5#
        • 2.Qf5#
        • 2.Qg6#
      • 1...Qd8
        • 2.Qf5#
        • 2.Qxe5#
        • 2.Qg6#
      • 1...Qe8
        • 2.Qd5#
        • 2.Qf5#
        • 2.Qxe5#
      • 1...Qf8
        • 2.Qd5#
        • 2.Qxe5#
        • 2.c7#
      • 1...Qg8
        • 2.Qf5#
        • 2.Qxe5#
        • 2.Qg6#
        • 2.c7#
      • 1...Rd4
        • 2.Qf5#
        • 2.Qxe5#
        • 2.Qg6#
      • 1...Bb3
        • 2.Qf5#
        • 2.Qxe5#
        • 2.Qg6#
      • 1...g6
        • 2.Qd5#
        • 2.Qxe5#
        • 2.Qxg6#
      • 1...Qc8!
    • 1.Qb5?
      • threat
        • 2.Qxe5#
      • 1...exf4
        • 2.Rxf4#
      • 1...d2
        • 2.Qxe2#
      • 1...Qb8!
    • 1.f5?
      • threat
        • 2.Rh4#
      • 1...exf5
        • 2.Qd5#
      • 1...d2
        • 2.Qxc2#
      • 1...Qh8
        • 2.c7#
      • 1...g5!
  • Keys
    • 1.Rh4!
      • threat
        • 2.f5#
      • 1...exf4
        • 2.Qxe6#
      • 1...d2
        • 2.Qxc2#
      • 1...Qh8
        • 2.c7#
      • 1...g5
        • 2.fxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(k);N_GUARD::B(H)+P(G)
    • Q(k);N_GUARD,P_PINR(J)::B(H)+P(G)
    • R(d);N_GUARD::QAR2(C)
    • R(d);N_GUARD::QAR2(C),XR(d)
    • B(a);N_GUARD::QAR(C),XR(d)
    • P(c);OGATEB::QAB(C),XB(a)
    • P(g);OGATEB,XP(F)::QAR2(C),XP(i)
  • Tries
    • Try
      • Q(C);P_PINP(g),XP(i)
      • Threat
        • DUALS(4)
      • Refutation
        • Q(k);P_PINQ(C)
    • Try
      • Q(C);
      • Threat
        • QAR1(C),XP(g)
      • Vars
        • P(g);OGATE,XP(F)::R1(A),XP(g)
        • P(c);OGATE::QAR2(C),XP(b)
      • Refutation
        • Q(k);
    • Try
      • P(F);
      • Threat
        • R(J)
      • Vars
        • P(i);N_GUARD,XP(F)::QAB1(C)
        • P(c);OGATEB::QAB(C),XB(a)
        • Q(k);N_GUARD,P_PINR(J)::B(H)+P(G)
      • Refutation
        • P(j);
  • Actual
    • R(J);
    • Threat
      • R(J)+P(F)
    • Vars
      • P(g);OGATEB,P_SPINP(g),XP(F)::QAR2(C),XP(i)
      • P(c);OGATEB::QAB(C),XB(a)
      • Q(k);N_GUARD,P_PINR(J)::B(H)+P(G)
      • P(j);OGATE::R(J)+P(F),XP(j)
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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).