MESON Chess Problem Database

Problem Display
PID: 232968 (Q7/8/b7/kpB5/P7/8/2K5/8 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Kudesnik, 1998

Q7/8/b7/kpB5/P7/8/2K5/8

#2

4 + 3

15148 Sadier Collection 2021
3713 Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxa4
      • 2.Qxa6#
  • Tries
    • 1.Qb7?
      • 1...Kxa4
        • 2.Qxa6#
      • 1...bxa4
        • 2.Bb4#
        • 2.Qb4#
        • 2.Qb6#
      • 1...b4
        • 2.Qxb4#
      • 1...Bxb7!
    • 1.Qa7?
      • 1...Kxa4
        • 2.Qxa6#
      • 1...bxa4
        • 2.Qb6#
      • 1...b4!
    • 1.axb5?
      • threat
        • 2.Qxa6#
      • 1...Ka4
        • 2.Qxa6#
      • 1...Kxb5!
  • Keys
    • 1.Qc6!
      • 1...Kxa4
        • 2.Qxa6#
      • 1...bxa4
        • 2.Qb6#
      • 1...Bb7
        • 2.Qxb5#
      • 1...Bc8
        • 2.Qxb5#
      • 1...b4
        • 2.Bb6#

This anticipates 48082(2002)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,XP(B)::QAR2(D),XB(c)
  • Tries
    • Try
      • Q(D);N_PINB(c)
      • Vars
        • K(a);P-FLIGHT,XP(B)::QAR2(D),XB(c)
        • P(b);OGATE::QAB1(D),XP(b)
      • Refutation
        • B(c);XQ(D)
    • Try
      • Q(D);
      • Vars
        • K(a);P-FLIGHT,XP(B)::QAR2(D),XB(c)
        • P(b);SBLOCK,XP(B)::QAB1(D)
      • Refutation
        • P(b);
    • Try
      • P(B);XP(b)
      • Threat
        • QAR1(D),XB(c)
      • Vars
        • K(a);P-FLIGHT::QAR2(D),XB(c)
      • Refutation
        • K(a);N_SPINB(c),P-FLIGHT,XP(B)
  • Actual
    • Q(D);N_PINB(c)
    • Vars
      • K(a);P-FLIGHT,P_SPINP(b),XP(B)::QAR2(D),XB(c)
      • P(b);SBLOCK,XP(B)::QAB1(D)
      • B(c);N_GUARD::QAR1(D),XP(b)
      • P(b);SBLOCK::B(C)
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