MESON Chess Problem Database

Problem Display
PID: 77506 (8/7K/8/3B4/3NQ3/8/1p6/k7 w - - 0 1)

Cyrulik, Stepan Pavlovich

Problemist Pribuzhya, 1992

8/7K/8/3B4/3NQ3/8/1p6/k7

#2

4 + 2

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Ba2?
      • threat
        • 2.Qb1#
      • 1...b1Q
        • 2.Qxb1#
      • 1...b1S
        • 2.Qxb1#
      • 1...b1B
        • 2.Qxb1#
      • 1...b1R
        • 2.Qxb1#
      • 1...Kxa2!
    • 1.Qc2?
      • 1...b1S
        • 2.Sb3#
        • 2.Qa2#
      • 1...b1B
        • 2.Sb3#
      • 1...b1R
        • 2.Qa2#
      • 1...b1Q!
  • Keys
    • 1.Qe5!
      • 1...b1Q+
        • 2.Sc2#
      • 1...b1B+
        • 2.Sc2#
        • 2.Sf5#
      • 1...Kb1
        • 2.Qe1#
      • 1...b1S
        • 2.Sc2#
      • 1...b1R
        • 2.Sc2#

Anticipated by 245246(1987)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);
      • Threat
        • QAR1(B)
      • Vars
        • P(b);P_PINQ(B)::QAR1(B),XQ(b)
        • P(b);::QAR1(B),XS(b)
        • P(b);P_PINQ(B)::QAR1(B),XB(b)
        • P(b);::QAR1(B),XR(b)
      • Refutation
        • K(a);P-FLIGHT,XB(C)
    • Try
      • Q(B);
      • Vars
        • P(b);P_PINQ(B)::S(A)
        • P(b);OGATE::QAR1(B)
      • Refutation
        • P(b);P_PINQ(B)
  • Actual
    • Q(B);
    • Vars
      • P(b);CHECK,SBLOCK::QAB(B)+S(A),DCHECK
      • K(a);P-FLIGHT::QAR(B)
      • P(b);SBLOCK::QAB(B)+S(A),DCHECK
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