MESON Chess Problem Database

Problem Display
PID: 172384 (8/8/2Q5/p7/1k1P4/1p6/1R6/3K4 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1997

8/8/2Q5/p7/1k1P4/1p6/1R6/3K4

#2

4 + 3

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...a4
      • 2.Qc5#
  • Tries
    • 1.Kc1?
      • 1...a4
        • 2.Qc5#
      • 1...Ka3!
    • 1.Ke1?
      • 1...a4
        • 2.Qc5#
      • 1...Ka3!
    • 1.Kd2?
      • 1...a4
        • 2.Qc5#
      • 1...Ka3!
    • 1.Ke2?
      • 1...a4
        • 2.Qc5#
      • 1...Ka3!
    • 1.Qa4+?
      • 1...Kc3
        • 2.Rxb3#
      • 1...Kxa4!
    • 1.Qc2?
      • threat
        • 2.Qxb3#
      • 1...Ka3
        • 2.Qxb3#
      • 1...Ka4
        • 2.Qxb3#
      • 1...a4
        • 2.Qc5#
      • 1...Kb5!
    • 1.Qc4+?
      • 1...Ka3
        • 2.Qxb3#
      • 1...Kxc4!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qxb3#
      • 1...Ka3
        • 2.Qxb3#
      • 1...Kc3
        • 2.Rxb3#
      • 1...Ka4
        • 2.Qxb3#
      • 1...a4
        • 2.Qc5#

Anticipated by 120720(1916)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAB1(D)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(c);SBLOCK::QAB1(D)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(c);SBLOCK::QAB1(D)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(c);SBLOCK::QAB1(D)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • K(A);S_FLIGHT
      • Vars
        • P(c);SBLOCK::QAB1(D)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::R1(B),XP(a)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT,XQ(D)
    • Try
      • Q(D);
      • Threat
        • QAR1(D),XP(a)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::QAR1(D),XP(a)
        • K(b);P-FLIGHT::QAB1(D),XP(a)
        • P(c);SBLOCK::QAB1(D)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::QAR1(D),XP(a)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT,XQ(D)
  • Actual
    • Q(D);
    • Threat
      • QAR1(D),XP(a)
    • Vars
      • K(b);N_SPINP(a),S_FLIGHT::QAR1(D),XP(a)
      • K(b);N_SPINP(a),S_FLIGHT::R1(B),XP(a)
      • K(b);N_SPINP(a),P-FLIGHT::QAB1(D),XP(a)
      • P(c);SBLOCK::QAB1(D)
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