MESON Chess Problem Database

Problem Display
PID: 133800 (8/3rPk1K/3Q4/B7/B7/8/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

200 Shakhmatni Zadachi, 1983

8/3rPk1K/3Q4/B7/B7/8/8/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Ra7
      • 2.e8Q#
      • 2.e8B#
    • 1...Rb7
      • 2.e8Q#
      • 2.e8B#
    • 1...Rc7
      • 2.e8Q#
      • 2.e8B#
    • 1...Rd8
      • 2.exd8S#
  • Tries
    • 1.Bc3?
      • 1...Rxd6
        • 2.e8Q#
      • 1...Rxe7
        • 2.Qf6#
      • 1...Ra7
        • 2.Qf6#
        • 2.e8Q#
        • 2.e8B#
      • 1...Rb7
        • 2.Qf6#
        • 2.e8Q#
        • 2.e8B#
      • 1...Rc7
        • 2.Qf6#
        • 2.e8Q#
        • 2.e8B#
      • 1...Rd8
        • 2.Qf6#
        • 2.exd8S#
      • 1...Ke8!
    • 1.Bb4?
      • threat
        • 2.Qg6#
      • 1...Ke8
        • 2.Qg6#
      • 1...Rxe7
        • 2.Qxe7#
      • 1...Rxd6!
    • 1.Qe6+?
      • 1...Ke8
        • 2.Bxd7#
      • 1...Kxe6!
    • 1.Qf6+?
      • 1...Ke8
        • 2.Qf8#
      • 1...Kxf6!
  • Keys
    • 1.Bd8!
      • threat
        • 2.Qg6#
      • 1...Ke8
        • 2.Qg6#
      • 1...Rxd6
        • 2.e8Q#
      • 1...Rxe7
        • 2.Qxe7#
      • 1...Rxd8
        • 2.exd8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(a);::P=Q
    • R(a);OGATE::PXR(a)=S
  • Tries
    • Try
      • B(B);
      • Vars
        • R(a);XQ(C)::P=Q
        • R(a);XP(D)::QAR1(C)
      • Refutation
        • K(b);P_PINP(D),P_SPINR(a),S_FLIGHT
    • Try
      • B(B);
      • Threat
        • QAB1(C)
      • Vars
        • K(b);P_PINP(D),P_SPINR(a),S_FLIGHT::QAB(C)
        • R(a);OGATE,XP(D)::QAR1(C),XR(a)
      • Refutation
        • R(a);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P_PINP(D),P_SPINR(a),S_FLIGHT::B(A),XR(a)
      • Refutation
        • K(b);P_PINP(D),S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,P_PINP(D),P_SPINR(a),S_FLIGHT::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT,P_PINP(D),XQ(C)
  • Actual
    • B(B);
    • Threat
      • QAB1(C)
    • Vars
      • K(b);P_PINP(D),P_SPINR(a),S_FLIGHT::QAB(C)
      • R(a);XQ(C)::P=Q
      • R(a);OGATE,XP(D)::QAR1(C),XR(a)
      • R(a);OGATE,XB(B)::PXR(a)=S
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