MESON Chess Problem Database

Problem Display
PID: 18671 (4q3/2RN1B2/1R2n3/2rP1n2/1Nk1p3/8/3P4/1Q2K3 w - - 0 1)

Samotugov, Evgeny S

Veliky, Mikola Moiseyovich

3rd Prize, Probleemblad, 1957

4q3/2RN1B2/1R2n3/2rP1n2/1Nk1p3/8/3P4/1Q2K3

#2

9 + 6

3976 FIDE Album (1956-1958) 1961

SOLUTION

  • SOUND
  • Sets
    • 1...Sfd4
      • 2.Se5#
    • 1...Sed4
      • 2.Rxc5#
    • 1...e3
      • 2.Qd3#
  • Tries
    • 1.Rxc5+?
      • 1...Kd4
        • 2.Sc6#
        • 2.Qa1#
        • 2.Qb2#
      • 1...Sxc5!
    • 1.Qa1?
      • threat
        • 2.Qc3#
      • 1...Kb3
        • 2.Qa2#
      • 1...Qh8!
    • 1.Qb2?
      • threat
        • 2.Se5#
        • 2.Qc3#
      • 1...Qxd7
        • 2.Qc3#
      • 1...Rxc7
        • 2.Qc3#
      • 1...Sxc7
        • 2.Qc3#
      • 1...Rc6
        • 2.Qc3#
      • 1...Sed4
        • 2.Rxc5#
        • 2.Qc3#
      • 1...Sf4
        • 2.Rxc5#
        • 2.Qc3#
      • 1...Sg5
        • 2.Rxc5#
        • 2.Qc3#
      • 1...Seg7
        • 2.Rxc5#
        • 2.Qc3#
      • 1...Sd8
        • 2.Rxc5#
        • 2.Qc3#
      • 1...Sf8
        • 2.Rxc5#
        • 2.Qc3#
      • 1...Qh8!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Qb3#
      • 1...Kd3
        • 2.Se5#
      • 1...Kxd5
        • 2.Rxc5#
      • 1...Sfd4
        • 2.Se3#
      • 1...Sed4
        • 2.Sa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(d);SBLOCK::S(H)
    • S(e);N_GUARD,SBLOCK::R1(G),XR(c)
    • P(b);N_GUARD::QAB1(A)
  • Tries
    • Try
      • R(G);CHECK,XR(c)
      • Refutation
        • S(e);XR(G)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);N_SPINR(c),S_FLIGHT::QAB1(A)
      • Refutation
        • Q(f);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);XS(H)::QAR1(A)
        • R(c);N_SPINR(c),XR(G)::QAR1(A)
        • S(e);N_SPINR(c),XR(G)::QAR1(A)
        • R(c);::QAR1(A)
      • Refutation
        • Q(f);
  • Actual
    • S(D);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);N_SPINR(c),S_FLIGHT::S(H)
      • K(a);N_SPINR(c),P_SPINS(e),S_FLIGHT,XP(E)::R1(G),XR(c)
      • S(d);N_GUARD,SBLOCK::S(D)
      • S(e);SBLOCK::S(D)
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