MESON Chess Problem Database

Problem Display
PID: 164292 (8/2K1kP1R/8/3b4/3Q4/8/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1996

8/2K1kP1R/8/3b4/3Q4/8/8/8

#2

4 + 2

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kf8
      • 2.Qc5#
      • 2.Qb4#
    • 1...Bh1
      • 2.Qd6#
    • 1...Ba2
      • 2.Qd6#
    • 1...Bg2
      • 2.Qd6#
    • 1...Bb3
      • 2.Qd6#
    • 1...Bf3
      • 2.Qd6#
    • 1...Bc4
      • 2.Qd6#
    • 1...Be4
      • 2.Qd6#
    • 1...Bc6
      • 2.Qd6#
    • 1...Be6
      • 2.Qd8#
    • 1...Bb7
      • 2.Qd6#
    • 1...Ba8
      • 2.Qd6#
  • Tries
    • 1.Qe5+?
      • 1...Kf8
        • 2.Qd6#
        • 2.Qe8#
      • 1...Be6!
    • 1.Qf6+?
      • 1...Kf8
        • 2.Rh8#
        • 2.Qd8#
        • 2.Qd6#
      • 1...Kxf6!
    • 1.Qh4+?
      • 1...Kf8
        • 2.Qd8#
        • 2.Qb4#
      • 1...Ke6!
    • 1.Qxd5?
      • threat
        • 2.Qd6#
      • 1...Kf8
        • 2.Qc5#
        • 2.Qd6#
        • 2.Qd8#
      • 1...Kf6!
    • 1.f8Q+?
      • 1...Ke6
        • 2.Rh6#
        • 2.Re7#
        • 2.Qdf6#
        • 2.Qff6#
        • 2.Qf7#
        • 2.Qc8#
      • 1...Kxf8!
    • 1.f8R+?
      • 1...Ke6
        • 2.Rf6#
        • 2.Qf6#
      • 1...Bf7
        • 2.Qd6#
      • 1...Kxf8!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qd6#
      • 1...Ke6
        • 2.f8S#
      • 1...Kf8
        • 2.Qd6#
        • 2.Qb4#
      • 1...Bxf7
        • 2.Qxf7#
      • 1...Be6
        • 2.f8Q#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • B(a);OGATE::QAB1(A)
    • B(a);OGATE,SBLOCK::QAB1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);XB(a)
      • Threat
        • QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(C);CHECK
      • Refutation
        • K(b);S_FLIGHT,XQ(C)
    • Try
      • P(C);CHECK
      • Vars
        • B(a);OGATE,P_SPINB(a)::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(b);P-FLIGHT::P=S
      • B(a);OGATE,P_SPINB(a),XP(C)::QAR1(A),XB(a)
      • B(a);SBLOCK::P=Q
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