MESON Chess Problem Database

Problem Display
PID: 18925 (8/2B5/2p5/8/3k4/K7/4B3/5Q2 w - - 0 1)

di Vincenzi, Renato

Unpublished, 1959

8/2B5/2p5/8/3k4/K7/4B3/5Q2

#2

4 + 2

5454 Near Snap 2007

SOLUTION

  • SOUND
  • Tries
    • 1.Bc4?
      • 1...Kc3
        • 2.Qd3#
      • 1...Ke3
        • 2.Qf4#
      • 1...Ke4
        • 2.Qd3#
        • 2.Qf4#
      • 1...c5
        • 2.Qd3#
      • 1...Kc5!
    • 1.Bb5?
      • 1...Kc3
        • 2.Qd3#
      • 1...Ke3
        • 2.Qf4#
      • 1...Ke4
        • 2.Qd3#
      • 1...Kc5
        • 2.Qc4#
      • 1...Kd5
        • 2.Qc4#
      • 1...c5
        • 2.Qd3#
      • 1...cxb5!
    • 1.Qa1+?
      • 1...Ke4
        • 2.Qe5#
      • 1...Kc5
        • 2.Qe5#
      • 1...Kd5
        • 2.Qe5#
      • 1...Ke3!
    • 1.Qd1+?
      • 1...Kc3
        • 2.Ba5#
        • 2.Be5#
        • 2.Qd3#
      • 1...Ke4
        • 2.Qd3#
      • 1...Kc5
        • 2.Qd6#
      • 1...Ke3!
    • 1.Qf3?
      • 1...c5
        • 2.Qd3#
      • 1...Kc5!
    • 1.Qf4+?
      • 1...Kc5
        • 2.Qe5#
        • 2.Qd6#
        • 2.Qc4#
      • 1...Kd5
        • 2.Qe5#
        • 2.Qc4#
      • 1...Kc3!
    • 1.Qf5?
      • threat
        • 2.Qe5#
      • 1...Kc3
        • 2.Qd3#
      • 1...Ke3!
    • 1.Qf6+?
      • 1...Ke4
        • 2.Qe5#
      • 1...Kc5
        • 2.Qe5#
        • 2.Qd6#
      • 1...Kd5
        • 2.Qe5#
      • 1...Ke3!
  • Keys
    • 1.Ba6!
      • 1...Kc3
        • 2.Qd3#
      • 1...Ke3
        • 2.Qf4#
      • 1...Ke4
        • 2.Qd3#
      • 1...Kc5
        • 2.Qc4#
      • 1...Kd5
        • 2.Qc4#
      • 1...c5
        • 2.Qd3#

This anticipates 103960(1993), 7857(1994)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(B);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB1(A)
        • P(b);SBLOCK::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);P-FLIGHT::QAB1(A)
        • P(b);SBLOCK::QAR1(A)
      • Refutation
        • P(b);XB(B)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(A)
        • K(a);OGATE,S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • K(a);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(b);SBLOCK::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(B);
    • Vars
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAB1(A)
      • P(b);SBLOCK::QAR1(A)
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