MESON Chess Problem Database

Problem Display
PID: 237282 (8/8/8/2Qp4/2bR4/1k6/3K4/1B6 w - - 0 1)

Cuppini, Alessandro

Problemist Pribuzhya, 1990

8/8/8/2Qp4/2bR4/1k6/3K4/1B6

#2

4 + 3

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Bc2#
    • 1...Bf1
      • 2.Qb4#
      • 2.Qc3#
    • 1...Be2
      • 2.Qb4#
      • 2.Qc3#
    • 1...Bd3
      • 2.Qb4#
      • 2.Qc3#
    • 1...Bb5
      • 2.Qb4#
      • 2.Qc3#
    • 1...Ba6
      • 2.Qb4#
      • 2.Qc3#
  • Tries
    • 1.Qxc4+?
      • 1...Kb2
        • 2.Qa2#
      • 1...Ka3
        • 2.Qa2#
        • 2.Qc3#
        • 2.Qb4#
      • 1...dxc4!
    • 1.Qa5?
      • 1...Bf1
        • 2.Rb4#
        • 2.Qc3#
        • 2.Qb4#
        • 2.Qa2#
      • 1...Be2
        • 2.Rb4#
        • 2.Qc3#
        • 2.Qb4#
        • 2.Qa2#
      • 1...Bd3
        • 2.Rb4#
        • 2.Qc3#
        • 2.Qb4#
        • 2.Qa2#
      • 1...Bb5
        • 2.Rb4#
        • 2.Qc3#
        • 2.Qb4#
        • 2.Qa2#
      • 1...Ba6
        • 2.Rb4#
        • 2.Qc3#
        • 2.Qb4#
        • 2.Qa2#
      • 1...Kb2!
  • Keys
    • 1.Kc1!
      • 1...Kc3
        • 2.Rd3#
      • 1...Ka4
        • 2.Bc2#
      • 1...Bf1
        • 2.Qb4#
      • 1...Be2
        • 2.Qb4#
      • 1...Bd3
        • 2.Qb4#
      • 1...Bb5
        • 2.Qb4#
      • 1...Ba6
        • 2.Qb4#

This anticipates 247890(1993-1994)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(a);P_SPINB(b),S_FLIGHT::B(A)
  • Tries
    • Try
      • Q(D);CHECK,XB(b)
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(D)
      • Refutation
        • P(c);XQ(D)
    • Try
      • Q(D);
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • K(B);S_FLIGHT
    • Vars
      • K(a);P-FLIGHT,P_SPINB(b)::R1(C)
      • K(a);P_SPINB(b),S_FLIGHT::B(A)
      • B(b);::QAR1(D)
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