MESON Chess Problem Database

Problem Display
PID: 99781 (B6K/5p2/8/2p5/8/8/4p2p/1QR2nkN w - - 0 1)

Kisis, Imants J

Magyar Sakkelet, 1979

B6K/5p2/8/2p5/8/8/4p2p/1QR2nkN

#2

5 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Qb6#
    • 1...f6
      • 2.Qg6#
  • Tries
    • 1.Re1?
      • 1...c4
        • 2.Qb6#
      • 1...f6
        • 2.Qg6#
      • 1...f5!
    • 1.Qc2?
      • threat
        • 2.Qxc5#
      • 1...e1Q
        • 2.Qg2#
      • 1...e1S
        • 2.Qf2#
      • 1...e1B
        • 2.Qg2#
      • 1...e1R
        • 2.Qf2#
        • 2.Qg2#
      • 1...c4!
    • 1.Qe4?
      • threat
        • 2.Qg2#
        • 2.Qe3#
        • 2.Qg4#
      • 1...e1Q
        • 2.Qg2#
      • 1...e1B
        • 2.Qg2#
      • 1...e1R
        • 2.Qg2#
      • 1...f5
        • 2.Qg2#
        • 2.Qe3#
      • 1...e1S!
    • 1.Qb2?
      • threat
        • 2.Qg7#
      • 1...e1Q
        • 2.Qg2#
      • 1...e1S
        • 2.Qf2#
      • 1...e1B
        • 2.Qg2#
      • 1...e1R
        • 2.Qf2#
        • 2.Qg2#
      • 1...f6!
  • Keys
    • 1.Qa2!
      • 1...e1Q
        • 2.Qg2#
      • 1...e1S
        • 2.Qf2#
      • 1...e1B
        • 2.Qg2#
      • 1...e1R
        • 2.Qf2#
        • 2.Qg2#
      • 1...c4
        • 2.Qa7#
      • 1...f5
        • 2.Qg8#
      • 1...f6
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(e);OGATEB::QAB(A)
    • P(f);N_GUARD::QAR(A)
  • Tries
    • Try
      • R(B);
      • Vars
        • P(e);OGATEB::QAB(A)
        • P(f);N_GUARD::QAR(A)
      • Refutation
        • P(f);
    • Try
      • Q(A);
      • Threat
        • QAB(A),XP(e)
      • Vars
        • P(c);N_SPINS(a),OGATE::QAR1(A)
        • P(c);N_SPINS(a),OGATE::QAB1(A)
      • Refutation
        • P(e);
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(c);N_SPINS(a)::QAR1(A)
      • Refutation
        • P(c);N_SPINS(a)
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • P(c);N_SPINS(a),OGATE::QAR1(A)
        • P(c);N_SPINS(a),OGATE::QAB1(A)
      • Refutation
        • P(f);
  • Actual
    • Q(A);
    • Vars
      • P(c);N_SPINS(a),OGATE::QAR1(A)
      • P(c);N_SPINS(a),OGATE::QAB1(A)
      • P(e);OGATEB::QAB(A)
      • P(f);OGATE::QAB(A)
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