MESON Chess Problem Database

Problem Display
PID: 12090 (4Q2b/1p1R4/pP5r/K1kN3r/8/1R6/B3N3/8 w - - 0 1)

Svyatov, Gennadi

1st HM., Shakhmaty v SSSR, 1974

4Q2b/1p1R4/pP5r/K1kN3r/8/1R6/B3N3/8

#2

8 + 6

145 StrateGems 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Rc3#
    • 1...Kc6
      • 2.Qc8#
    • 1...Re5
      • 2.Rc3#
    • 1...Rf6
      • 2.Rc3#
    • 1...Rh7
      • 2.Qc8#
    • 1...Bc3+
      • 2.Rxc3#
    • 1...Bf6
      • 2.Qc8#
  • Tries
    • 1.Rb5+?
      • 1...Kc6
        • 2.Sb4#
        • 2.Se7#
        • 2.Rd8#
        • 2.Qc8#
      • 1...axb5!
    • 1.Qe3+?
      • 1...Kc4
        • 2.Rb1#
        • 2.Rb2#
        • 2.Ra3#
        • 2.Rc3#
        • 2.Rd3#
        • 2.Rb4#
        • 2.Rb5#
      • 1...Bd4
        • 2.Rc3#
      • 1...Kc6!
    • 1.Qf8+?
      • 1...Kc4
        • 2.Ra3#
        • 2.Rc3#
        • 2.Re3#
        • 2.Rf3#
        • 2.Rg3#
        • 2.Rh3#
        • 2.Qb4#
      • 1...Kc6
        • 2.Qc8#
      • 1...Rd6!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Rc3#
        • 2.Qc8#
      • 1...Kc4+
        • 2.Rb5#
      • 1...Kc6+
        • 2.Rd5#
      • 1...Rxf6
        • 2.Rc3#
      • 1...Bxf6
        • 2.Qc8#
      • 1...Rh3
        • 2.Qc8#
      • 1...Rh4
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • K(a);P-FLIGHT,P_PINS(E)::B(A)+R(C),DCHECK
    • K(a);P-FLIGHT,P_PINS(E)::QAR2(H)
    • R(b);S_CUTB(f)::R(C)
    • R(d);S_CUTB(f)::R(C)
    • R(d);N_GUARD::QAR(H)
    • B(f);CHECK,N_GUARD::R(C),XB(f)
    • B(f);S_CUTR(d)::QAR(H)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • P(c);XR(C)
    • Try
      • Q(H);CHECK
      • Vars
        • B(f);P_SPINB(f)::R(C)
      • Refutation
        • K(a);P-FLIGHT,P_PINS(E)
    • Try
      • Q(H);CHECK
      • Vars
        • K(a);P-FLIGHT,P_PINS(E)::QAR2(H)
      • Refutation
        • R(d);P_SPINR(d)
  • Actual
    • S(E);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);CHECK,P-FLIGHT::B(A)+R(C)
      • K(a);CHECK,P-FLIGHT::QAB(H)+R(G)
      • R(d);XS(E)::R(C)
      • B(f);XS(E)::QAR(H)
      • R(b);::QAR(H)
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