MESON Chess Problem Database

Problem Display
PID: 172387 (8/6R1/8/8/6pk/4K2p/4B3/2Q5 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1997

8/6R1/8/8/6pk/4K2p/4B3/2Q5

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...g3
      • 2.Qc4#
  • Tries
    • 1.Kf2?
      • threat
        • 2.Rh7#
        • 2.Qg5#
        • 2.Qh6#
      • 1...Kh5
        • 2.Qg5#
      • 1...h2
        • 2.Rh7#
        • 2.Qh6#
      • 1...g3+!
    • 1.Rh7+?
      • 1...Kg3
        • 2.Qg1#
      • 1...Kg5!
    • 1.Qe1+?
      • 1...g3
        • 2.Qxg3#
        • 2.Qb4#
      • 1...Kh5!
    • 1.Qf1?
      • 1...Kg3
        • 2.Qf2#
      • 1...Kh5
        • 2.Qxh3#
      • 1...g3
        • 2.Qf4#
        • 2.Qf6#
      • 1...h2!
    • 1.Qg1?
      • threat
        • 2.Qxg4#
      • 1...g3
        • 2.Qxg3#
      • 1...Kh5!
    • 1.Qc7?
      • 1...h2
        • 2.Qxh2#
      • 1...g3
        • 2.Qxg3#
        • 2.Qf4#
        • 2.Qd8#
        • 2.Qc4#
        • 2.Qe7#
      • 1...Kh5!
    • 1.Qc8?
      • threat
        • 2.Qxg4#
      • 1...Kh5
        • 2.Qh8#
      • 1...g3
        • 2.Qg4#
        • 2.Qc4#
        • 2.Qd8#
        • 2.Qh8#
      • 1...Kg3!
  • Keys
    • 1.Qh1!
      • 1...Kg3
        • 2.Rxg4#
      • 1...Kh5
        • 2.Qxh3#
      • 1...h2
        • 2.Qxh2#
      • 1...g3
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB::QAR(A)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • DUALS(3)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(b)::QAR1(A)
      • Refutation
        • P(b);CHECK
    • Try
      • R(D);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR2(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(A);
      • Vars
        • K(c);P_SPINP(b),S_FLIGHT::QAB1(A)
        • K(c);P-FLIGHT,P_SPINP(b)::QAR2(A),XP(a)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(b)
      • Vars
        • P(b);::QAB1(A),XP(b)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(A);
      • Vars
        • P(a);OGATEB::QAR2(A),XP(a)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(b)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(b)::QAR(A)
      • Refutation
        • K(c);P_SPINP(b),S_FLIGHT
  • Actual
    • Q(A);P_PINP(a)
    • Vars
      • K(c);N_SPINP(a),P_SPINP(b),S_FLIGHT::R1(D),XP(b)
      • K(c);P-FLIGHT::QAR2(A),XP(a)
      • P(a);OGATEB::QAR2(A),XP(a)
      • P(b);OGATEB::QAR(A)
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