MESON Chess Problem Database

Problem Display
PID: 186005 (8/8/8/1pQ5/k4p2/5B2/2P5/K7 w - - 0 1)

Chernyavsky, Mykola Vasilovich

Problem Observer, 2017

8/8/8/1pQ5/k4p2/5B2/2P5/K7

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Ka2?
      • threat
        • 2.Qa3#
      • 1...b4
        • 2.Bc6#
      • 1...Ka5!
    • 1.Kb2?
      • threat
        • 2.Qa3#
      • 1...b4
        • 2.Bc6#
      • 1...Ka5!
    • 1.Be2?
      • 1...Ka5
        • 2.Qxb5#
      • 1...b4
        • 2.Qa7#
      • 1...f3!
    • 1.Bc6?
      • 1...Ka5
        • 2.Qxb5#
      • 1...f3!
    • 1.Qb6?
      • 1...Ka3
        • 2.Qa5#
      • 1...b4
        • 2.Qa6#
      • 1...Kb4!
    • 1.Qd6?
      • 1...b4
        • 2.Qa6#
      • 1...Ka5!
    • 1.Qxb5+?
      • 1...Ka3
        • 2.Qb3#
        • 2.Qa5#
      • 1...Kxb5!
  • Keys
    • 1.c3!
      • threat
        • 2.Qb4#
      • 1...Kb3
        • 2.Bd1#
      • 1...Ka5
        • 2.Qa7#
      • 1...b4
        • 2.Qxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • QAR1(D)
      • Vars
        • P(c);OGATEB::B(C)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(c)
    • Try
      • K(A);S_FLIGHT
      • Threat
        • QAR1(D)
      • Vars
        • P(c);OGATEB::B(C)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(c)
    • Try
      • B(C);
      • Vars
        • K(a);P-FLIGHT,P_SPINP(c)::QAR1(D),XP(c)
        • P(c);SBLOCK::QAR(D)
      • Refutation
        • P(b);
    • Try
      • B(C);P_PINP(c)
      • Vars
        • K(a);P-FLIGHT::QAR1(D),XP(c)
      • Refutation
        • P(b);
    • Try
      • Q(D);
      • Vars
        • K(a);P-FLIGHT::QAR2(D)
        • P(c);SBLOCK::QAR2(D)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(c)
    • Try
      • Q(D);
      • Vars
        • P(c);SBLOCK::QAR2(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);CHECK,XP(c)
      • Refutation
        • K(a);S_FLIGHT,XQ(D)
  • Actual
    • P(B);
    • Threat
      • QAR1(D)
    • Vars
      • K(a);S_FLIGHT::B(C)
      • K(a);P-FLIGHT,P_SPINP(c)::QAR2(D)
      • P(c);::QAR1(D),XP(c)
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