MESON Chess Problem Database

Problem Display
PID: 34283 (7Q/3p2N1/1R1PP3/1Npk1n2/Rn6/1P5B/3K4/B6b w - - 0 1)

Rukhlis, Efim Naumovich

3rd Prize, CSTV, 1948

7Q/3p2N1/1R1PP3/1Npk1n2/Rn6/1P5B/3K4/B6b

#2

11 + 6

113 Shakhmaty v SSSR 1949
3105 FIDE Album (1945-1955) 1964
3713 Snap 2007
133 The Problemist Supplement 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.Bxg2#
    • 1...Be4
      • 2.Sc7#
    • 1...Sa2
      • 2.Sc7#
      • 2.Qa8#
    • 1...Sc2
      • 2.Sc7#
      • 2.Qa8#
    • 1...Sd3
      • 2.Sc7#
      • 2.Qa8#
    • 1...Sa6
      • 2.Qa8#
  • Tries
    • 1.Sc3+?
      • 1...Kd4
        • 2.Sxf5#
      • 1...Ke5!
    • 1.Sxf5?
      • threat
        • 2.Qe5#
      • 1...Kxe6
        • 2.Qg8#
      • 1...Sd3
        • 2.Sc7#
        • 2.Se3#
        • 2.Se7#
      • 1...Sc6
        • 2.Sc7#
        • 2.Se3#
      • 1...Ke4!
    • 1.Se8?
      • threat
        • 2.Qe5#
      • 1...Kxe6
        • 2.Qg8#
      • 1...Sd3
        • 2.Sbc7#
        • 2.Sec7#
      • 1...Sc6
        • 2.Sbc7#
        • 2.Sec7#
      • 1...Sd4
        • 2.Sc3#
      • 1...Sg7
        • 2.Sf6#
      • 1...Ke4!
    • 1.Bxf5?
      • threat
        • 2.Sc7#
        • 2.Qxh1#
      • 1...Bg2
        • 2.Sc7#
      • 1...Bf3
        • 2.Sc7#
      • 1...Be4
        • 2.Sc7#
      • 1...Sa6
        • 2.Qxh1#
        • 2.Qa8#
      • 1...Sc6
        • 2.Qxh1#
      • 1...c4!
  • Keys
    • 1.Sh5!
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Qa8#
      • 1...Kxe6
        • 2.Qg8#
      • 1...Sd3
        • 2.Sc7#
      • 1...Sc6
        • 2.Sf4#
      • 1...Sd4
        • 2.Sc3#
      • 1...Sg7
        • 2.Sf6#

This anticipates 53856(1951)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::B(D),XB(a)
    • B(a);SBLOCK::S(F)
    • S(b);N_GUARD::QAB(K)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINS(b)::QAB(K)+S(J),DCHECK,XS(e)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • S(J);XS(e)
      • Threat
        • QAR1(K)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XP(I)::QAB(K)
      • Refutation
        • K(d);P_SPINS(b),S_FLIGHT
    • Try
      • S(J);
      • Threat
        • QAR1(K)
      • Vars
        • K(d);OGATEB,P_SPINS(e),S_FLIGHT,XP(I)::QAB(K)
        • S(e);::S(F)
        • S(e);::S(J)
      • Refutation
        • K(d);P_SPINS(b),S_FLIGHT
    • Try
      • B(D);XS(e)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::S(F)
        • S(b);::QAB(K),XB(a)
      • Refutation
        • P(c);
  • Actual
    • S(J);
    • Threat
      • QAR1(K)
    • Vars
      • K(d);P_SPINS(b),S_FLIGHT::QAB(K)
      • K(d);OGATEB,P_SPINS(e),S_FLIGHT,XP(I)::QAB(K)
      • S(b);::S(F)
      • S(b);::S(J)
      • S(e);::S(F)
      • S(e);::S(J)
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