MESON Chess Problem Database

Problem Display
PID: 59833 (7Q/3pB1K1/Rn1P1r2/4kpN1/3b1N2/6P1/5n2/5r2 w - - 0 1)

Livshits, Eduard Yakovlevich

Shedey, Sergey Oleksandrovich

1st Prize, Source?, 1970

7Q/3pB1K1/Rn1P1r2/4kpN1/3b1N2/6P1/5n2/5r2

#2

8 + 8

3751 FIDE Album (1968-1970) 1977

SOLUTION

  • SOUND
  • Sets
    • 1...Rg6+
      • 2.Kxg6#
    • 1...Rh6
      • 2.Kxh6#
    • 1...Rf7+
      • 2.Kxf7#
    • 1...Rf8
      • 2.Kxf8#
    • 1...Sa4
      • 2.Bxf6#
    • 1...Sc4
      • 2.Bxf6#
    • 1...Sa8
      • 2.Bxf6#
    • 1...Sc8
      • 2.Bxf6#
  • Tries
    • 1.Kg8?
      • threat
        • 2.Qxf6#
      • 1...Se4
        • 2.Sf7#
      • 1...Sd5
        • 2.Sg6#
      • 1...Sg4!
    • 1.Ra5+?
      • 1...Sd5
        • 2.Rxd5#
      • 1...Bc5!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Sf3#
      • 1...Rg6+
        • 2.Sxg6#
      • 1...Rf7+
        • 2.Sxf7#
      • 1...Sxa8
        • 2.Bxf6#
      • 1...Sg4
        • 2.Sd3#
      • 1...Sd1
        • 2.Sd3#
      • 1...Sh1
        • 2.Sd3#
      • 1...Sd3
        • 2.Sxd3#
      • 1...Sh3
        • 2.Sd3#
      • 1...Se4
        • 2.Sd3#
      • 1...Sd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 7
    • REMOVED MATES = 5
  • Sets
    • R(g);CHECK::QAB(H)+K(G),XR(g)
    • R(g);::QAB(H)+K(G),XR(g)
    • S(f);::B(F),XR(g)
  • Tries
    • Try
      • K(G);P-FLIGHT,P_PINR(g)
      • Threat
        • QAB1(H),XR(g)
      • Vars
        • S(b);SBLOCK::S(C)
        • S(f);SBLOCK::S(B)
      • Refutation
        • S(b);
    • Try
      • R(D);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::R1(D),XS(f)
      • Refutation
        • B(c);P_SPINB(c)
  • Actual
    • Q(H);
    • Threat
      • S(C)
    • Vars
      • R(g);CHECK,N_GUARD::S(B),XR(g)
      • R(g);CHECK,N_GUARD::S(C),XR(g)
      • S(f);XQ(H)::B(F),XR(g)
      • S(b);N_GUARD::S(B)
      • S(b);N_GUARD::S(B),XS(b)
      • S(f);N_GUARD::QAR1(H),XS(f)
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