MESON Chess Problem Database

Problem Display
PID: 172408 (8/8/8/kp6/P2Q4/8/K7/5B2 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1997

8/8/8/kp6/P2Q4/8/K7/5B2

#2

4 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...bxa4
      • 2.Qc5#
    • 1...b4
      • 2.Qa7#
  • Tries
    • 1.Ka1?
      • 1...bxa4
        • 2.Qc5#
      • 1...b4
        • 2.Qa7#
      • 1...Ka6!
    • 1.Kb1?
      • 1...bxa4
        • 2.Qc5#
      • 1...b4
        • 2.Qa7#
      • 1...Ka6!
    • 1.Kb2?
      • 1...bxa4
        • 2.Qc5#
      • 1...b4
        • 2.Qa7#
      • 1...Ka6!
    • 1.Ka3?
      • threat
        • 2.Qa7#
      • 1...b4+
        • 2.Qxb4#
      • 1...Ka6!
    • 1.Be2?
      • 1...bxa4
        • 2.Qc5#
      • 1...b4
        • 2.Qa7#
      • 1...Ka6!
    • 1.Bd3?
      • 1...bxa4
        • 2.Qc5#
      • 1...b4
        • 2.Qa7#
      • 1...Ka6!
    • 1.Qc5?
      • threat
        • 2.Qxb5#
      • 1...Kxa4
        • 2.Qa3#
        • 2.Qxb5#
      • 1...Ka6!
  • Keys
    • 1.Qd6!
      • 1...Kxa4
        • 2.Qa3#
      • 1...bxa4
        • 2.Qc5#
      • 1...b4
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB,SBLOCK,XP(C)::QAR2(D)
    • P(b);SBLOCK::QAR2(D)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(b);OGATEB,SBLOCK,XP(C)::QAR2(D)
        • P(b);SBLOCK::QAR2(D)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • K(B);S_FLIGHT
      • Vars
        • P(b);OGATEB,SBLOCK,XP(C)::QAR2(D)
        • P(b);SBLOCK::QAR2(D)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(b);OGATEB,SBLOCK,XP(C)::QAR2(D)
        • P(b);SBLOCK::QAR2(D)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • K(B);P-FLIGHT
      • Threat
        • QAR2(D)
      • Vars
        • P(b);CHECK::QAB1(D),XP(b)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • B(A);
      • Vars
        • P(b);OGATEB,SBLOCK,XP(C)::QAR2(D)
        • P(b);SBLOCK::QAR2(D)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • B(A);
      • Vars
        • P(b);OGATEB,SBLOCK,XP(C)::QAR2(D)
        • P(b);SBLOCK::QAR2(D)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(D);P_PINP(b)
      • Threat
        • QAR1(D),XP(b)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(a);OGATEB,P-FLIGHT,XP(C)::QAR1(D)
      • P(b);OGATEB,SBLOCK,XP(C)::QAR2(D)
      • P(b);SBLOCK::QAR1(D)
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