MESON Chess Problem Database

Problem Display
PID: 232912 (4b3/8/pp6/k7/4Q3/K7/4B3/4b3 w - - 0 1)

Dikusarov, Andrey Nikolayovich

Kudesnik, 2015

4b3/8/pp6/k7/4Q3/K7/4B3/4b3

#2

3 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Qb4#
    • 1...Bg3
      • 2.Qb4#
    • 1...Bb4+
      • 2.Qxb4#
    • 1...Bh4
      • 2.Qb4#
    • 1...Ba4
      • 2.Qxa4#
    • 1...Bh5
      • 2.Qa4#
    • 1...Bg6
      • 2.Qa4#
    • 1...Bf7
      • 2.Qa4#
  • Tries
    • 1.Qd5+?
      • 1...b5
        • 2.Qd8#
      • 1...Bb5!
    • 1.Qc4?
      • threat
        • 2.Qxa6#
      • 1...Bb4+
        • 2.Qxb4#
      • 1...b5
        • 2.Qc7#
      • 1...Bb5!
    • 1.Qe5+?
      • 1...b5
        • 2.Qc7#
      • 1...Bb5!
    • 1.Qxe8?
      • threat
        • 2.Qa4#
      • 1...b5
        • 2.Qd8#
      • 1...Bb4+!
  • Keys
    • 1.Bb5!
      • threat
        • 2.Qa4#
      • 1...Bb4+
        • 2.Qxb4#
      • 1...Kxb5
        • 2.Qd5#
      • 1...Bxb5
        • 2.Qxe1#
      • 1...axb5
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • B(a);N_GUARD::QAB1(C)
    • B(a);CHECK,N_GUARD::QAB1(C),XB(a)
    • B(e);N_GUARD::QAR1(C),XB(e)
    • B(e);N_GUARD::QAR1(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • P(d);OGATEB,P_SPINP(d)::QAB(C)
      • Refutation
        • B(e);P_SPINB(e)
    • Try
      • Q(C);
      • Threat
        • QAR1(C),XP(c)
      • Vars
        • B(a);CHECK,N_GUARD::QAB1(C),XB(a)
        • P(d);OGATEB::QAB(C)
      • Refutation
        • B(e);
    • Try
      • Q(C);CHECK
      • Vars
        • P(d);OGATEB,P_SPINP(d)::QAB(C)
      • Refutation
        • B(e);P_SPINB(e)
    • Try
      • Q(C);XB(e)
      • Threat
        • QAR1(C)
      • Vars
        • P(d);OGATEB::QAB(C)
      • Refutation
        • B(a);CHECK
  • Actual
    • B(A);
    • Threat
      • QAR1(C)
    • Vars
      • B(a);CHECK,N_GUARD::QAB1(C),XB(a)
      • K(b);OGATEB,P-FLIGHT,XB(A)::QAR2(C)
      • B(e);SBLOCK,XB(A)::QAB(C),XB(a)
      • P(c);OGATEB,SBLOCK,XB(A)::QAR(C)
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