MESON Chess Problem Database

Problem Display
PID: 277260 (8/6Q1/5p1K/2PP4/2N1Pk2/2R3N1/8/3b2B1 w - - 0 1)

Kopaev, Viacheslav Georgievich

diagrammes, 1980

8/6Q1/5p1K/2PP4/2N1Pk2/2R3N1/8/3b2B1

#2

9 + 3

5454 Near Snap 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Be3#
    • 1...Bg4
      • 2.Qc7#
    • 1...f5
      • 2.Qg5#
  • Tries
    • 1.Re3?
      • 1...Bc2
        • 2.Se2#
        • 2.Sh5#
      • 1...Be2
        • 2.Sxe2#
      • 1...Bb3
        • 2.Se2#
        • 2.Sh5#
      • 1...Ba4
        • 2.Se2#
        • 2.Sh5#
      • 1...Bg4
        • 2.Qc7#
      • 1...Bh5
        • 2.Sxh5#
      • 1...f5
        • 2.Qg5#
      • 1...Bf3!
    • 1.Rf3+?
      • 1...Bxf3
        • 2.Be3#
      • 1...Kxf3!
    • 1.Qg6?
      • threat
        • 2.Qf5#
      • 1...Bf3
        • 2.Be3#
      • 1...f5
        • 2.Qxf5#
        • 2.Qg5#
      • 1...Bg4!
    • 1.Qd7?
      • threat
        • 2.Qf5#
      • 1...f5
        • 2.Qxf5#
      • 1...Bg4
        • 2.Qd6#
        • 2.Qc7#
      • 1...Bf3!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qxf6#
      • 1...Kxe5
        • 2.Qc7#
      • 1...fxe5
        • 2.Qg5#
      • 1...Bf3
        • 2.Sd3#
      • 1...Bg4
        • 2.Sg6#
      • 1...f5
        • 2.Be3#

Anticipated by 103934(1959), 135283(1959)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::B(A)
    • B(a);SBLOCK::QAB(I)
    • P(c);N_GUARD::QAB1(I)
  • Tries
    • Try
      • R(B);
      • Vars
        • B(a);N_GUARD::S(C),XB(a)
        • B(a);SBLOCK::QAB(I)
        • P(c);N_GUARD::QAB1(I)
      • Refutation
        • B(a);
    • Try
      • R(B);CHECK
      • Vars
        • B(a);SBLOCK,XR(B)::B(A)
      • Refutation
        • K(b);P-FLIGHT,XR(B)
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • B(a);SBLOCK::B(A)
      • Refutation
        • B(a);
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • P(c);::QAR1(I),XP(c)
      • Refutation
        • B(a);
  • Actual
    • S(D);
    • Threat
      • QAR2(I),XP(c)
    • Vars
      • K(b);OGATEB,P_SPINP(c),S_FLIGHT,XS(D)::QAB(I)
      • P(c);N_GUARD,XS(D)::QAB1(I)
      • B(a);SBLOCK::S(D)
      • P(c);::B(A)
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