MESON Chess Problem Database

Problem Display
PID: 22291 (8/8/8/3p4/1QNkP3/B7/3K4/8 w - - 0 1)

Henkin, B

Moldavian Ty., 1964

8/8/8/3p4/1QNkP3/B7/3K4/8

#2

5 + 2

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991

SOLUTION

  • SOUND
  • Sets
    • 1...dxe4
      • 2.Qc5#
  • Tries
    • 1.Qa5?
      • threat
        • 2.Qxd5#
      • 1...Kxc4
        • 2.Qb4#
        • 2.Qa4#
        • 2.Qxd5#
      • 1...dxc4
        • 2.Qd5#
      • 1...dxe4
        • 2.Qc5#
      • 1...Kxe4!
    • 1.Qd6?
      • threat
        • 2.Qxd5#
      • 1...Kxc4
        • 2.Qb4#
        • 2.Qxd5#
      • 1...Kxe4!
    • 1.Qb2+?
      • 1...Kxc4
        • 2.Qb4#
      • 1...Kxe4!
    • 1.Qb5?
      • threat
        • 2.Qxd5#
      • 1...dxc4
        • 2.Qd5#
      • 1...dxe4
        • 2.Bb2#
        • 2.Qc5#
      • 1...Kxe4!
    • 1.Qb6+?
      • 1...Kxc4
        • 2.Qb4#
      • 1...Kxe4!
  • Keys
    • 1.Qe7!
      • 1...Kxc4
        • 2.Qb4#
      • 1...dxc4
        • 2.Bc5#
      • 1...dxe4
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK,XP(E)::QAB1(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR1(C),XP(b)
      • Vars
        • P(b);XS(D)::QAR1(C)
        • P(b);SBLOCK,XP(E)::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT,XP(E)
    • Try
      • Q(C);P_PINP(b)
      • Threat
        • QAR1(C),XP(b)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT,XP(E)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(D)::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XP(E)
    • Try
      • Q(C);
      • Threat
        • QAR1(C),XP(b)
      • Vars
        • P(b);XS(D)::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XP(E)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(D)::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XP(E)
  • Actual
    • Q(C);
    • Vars
      • K(a);OGATEB,P-FLIGHT,XS(D)::QAR1(C)
      • P(b);SBLOCK,XS(D)::B(B)
      • P(b);SBLOCK,XP(E)::QAB1(C)
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