MESON Chess Problem Database

Problem Display
PID: 136392 (8/3pP3/1p6/2kN3R/8/3K4/7Q/7B w - - 0 1)

Cuppini, Alessandro

Source?, 0000

8/3pP3/1p6/2kN3R/8/3K4/7Q/7B

#2

6 + 3

6490 yacpdb 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Sb4#
    • 1...b5
      • 2.Qc7#
  • Tries
    • 1.Sc3+?
      • 1...Kb4
        • 2.Qb2#
      • 1...d5!
    • 1.Qg1+?
      • 1...Kc6
        • 2.Qxb6#
      • 1...Kd6
        • 2.Qxb6#
      • 1...Kb5!
    • 1.Qb8?
      • threat
        • 2.Qxb6#
      • 1...Kc6
        • 2.Sb4#
        • 2.Qxb6#
      • 1...b5
        • 2.Qc7#
        • 2.Qb6#
      • 1...Kb5!
    • 1.Qb2?
      • threat
        • 2.Qxb6#
      • 1...Kc6
        • 2.Qxb6#
      • 1...Kd6
        • 2.Qxb6#
      • 1...b5!
    • 1.Qf2+?
      • 1...Kc6
        • 2.Qxb6#
      • 1...Kd6
        • 2.Qxb6#
      • 1...Kb5!
    • 1.e8Q?
      • 1...Kc6
        • 2.Sc3#
        • 2.Se3#
        • 2.Sb4#
        • 2.Sf6#
        • 2.Sc7#
        • 2.Se7#
      • 1...d6
        • 2.Qg1#
        • 2.Qc2#
        • 2.Qf2#
      • 1...b5
        • 2.Qc7#
        • 2.Qc8#
      • 1...Kb5!
    • 1.e8B?
      • 1...Kc6
        • 2.Sc3#
        • 2.Se3#
        • 2.Sb4#
        • 2.Sf6#
        • 2.Sc7#
        • 2.Se7#
      • 1...d6
        • 2.Qg1#
        • 2.Qc2#
        • 2.Qf2#
      • 1...b5
        • 2.Qc7#
      • 1...Kb5!
  • Keys
    • 1.Qf4!
      • 1...Kb5
        • 2.Sc7#
      • 1...Kc6
        • 2.Sb4#
      • 1...d6
        • 2.Qc4#
      • 1...b5
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::B(A)+S(D),DCHECK
    • P(b);SBLOCK::QAR2(B)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(B),XP(b)
        • K(a);OGATE,S_FLIGHT::QAR2(B),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XP(b)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XP(b)
      • Vars
        • K(a);P-FLIGHT::QAR1(B),XP(b)
        • K(a);S_FLIGHT::QAR2(B),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(B),XP(b)
        • K(a);OGATE,S_FLIGHT::QAR2(B),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(F);
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(c)
    • Try
      • P(F);
      • Vars
        • P(b);SBLOCK::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(c)
  • Actual
    • Q(B);
    • Vars
      • K(a);P-FLIGHT::R(E)+S(D),DCHECK
      • K(a);P-FLIGHT::B(A)+S(D),DCHECK
      • P(c);SBLOCK::QAR1(B)
      • P(b);SBLOCK::QAR2(B)
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