MESON Chess Problem Database

Problem Display
PID: 158944 (2B4K/5p2/6kp/8/1Q6/5N2/8/8 w - - 0 1)

Markovic, Mirko B

Front Ty., 1970

2B4K/5p2/6kp/8/1Q6/5N2/8/8

#2

4 + 3

15523 Moje Sahovske Kompozicije (Markovic) 2006
5454 Near Snap 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Kh5
      • 2.Qg4#
    • 1...Kf6
      • 2.Qd6#
  • Tries
    • 1.Qc5?
      • threat
        • 2.Qf5#
      • 1...Kf6
        • 2.Qd6#
      • 1...h5
        • 2.Qg5#
      • 1...f5
        • 2.Qxf5#
      • 1...f6!
    • 1.Qe7?
      • 1...Kh5
        • 2.Qxf7#
      • 1...h5
        • 2.Qg5#
      • 1...f6
        • 2.Qe8#
      • 1...f5!
    • 1.Qb1+?
      • 1...Kh5
        • 2.Qf5#
      • 1...f5
        • 2.Qxf5#
      • 1...Kf6!
    • 1.Qe4+?
      • 1...Kh5
        • 2.Bg4#
        • 2.Qf5#
        • 2.Qg4#
      • 1...f5
        • 2.Qxf5#
      • 1...Kf6!
    • 1.Qf4?
      • threat
        • 2.Qf5#
      • 1...Kh5
        • 2.Qg4#
        • 2.Qf5#
        • 2.Qxf7#
      • 1...f5
        • 2.Qxf5#
      • 1...h5
        • 2.Sh4#
        • 2.Se5#
        • 2.Qg5#
      • 1...f6!
    • 1.Qh4?
      • threat
        • 2.Se5#
      • 1...h5
        • 2.Qg5#
      • 1...f6!
    • 1.Qb5?
      • threat
        • 2.Qf5#
      • 1...h5
        • 2.Qg5#
      • 1...f5
        • 2.Qxf5#
      • 1...f6
        • 2.Qe8#
      • 1...Kf6!
  • Keys
    • 1.Qf8!
      • 1...Kh5
        • 2.Qxf7#
      • 1...Kf6
        • 2.Qd6#
      • 1...h5
        • 2.Qg7#
      • 1...f5
        • 2.Qxf5#
      • 1...f6
        • 2.Qe8#

This anticipates 48071(2002)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(B)
    • K(a);P-FLIGHT::QAR2(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
        • P(b);N_GUARD::QAR1(B)
        • P(c);::QAB1(B),XP(c)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAB(B),XP(c)
        • P(b);N_GUARD::QAR1(B)
        • P(c);OGATEB,SBLOCK::QAB(B)
      • Refutation
        • P(c);
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
        • P(c);P_SPINP(c)::QAB1(B),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAB1(B),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • P(c);::QAB1(B),XP(c)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Threat
        • S(A)
      • Vars
        • P(b);N_GUARD::QAR1(B)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • P(b);N_GUARD::QAR1(B)
        • P(c);::QAB1(B),XP(c)
        • P(c);OGATEB,SBLOCK::QAB(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::QAB(B),XP(c)
      • K(a);P-FLIGHT,P_SPINP(c)::QAR2(B)
      • P(b);SBLOCK::QAR1(B)
      • P(c);OGATE::QAB1(B),XP(c)
      • P(c);OGATEB,SBLOCK::QAB(B)
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