MESON Chess Problem Database

Problem Display
PID: 244819 (8/5NK1/N7/P4B2/1p1kP3/1Q1n2P1/5P2/8 w - - 0 1)

Feoktistov, Aleksandr Fedorovich

Shakhmaty (Riga), 1970

8/5NK1/N7/P4B2/1p1kP3/1Q1n2P1/5P2/8

#2

9 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sc5?
      • threat
        • 2.Se6#
      • 1...Kxc5
        • 2.Qd5#
      • 1...Sf4
        • 2.Qxb4#
      • 1...Sxc5!
    • 1.Sc7?
      • threat
        • 2.Se6#
      • 1...Kc5
        • 2.Qd5#
      • 1...Sc5
        • 2.Sb5#
      • 1...Sf4!
    • 1.Se5?
      • threat
        • 2.Sf3#
        • 2.Sc6#
      • 1...Kxe5
        • 2.Qd5#
      • 1...Se1
        • 2.Sc6#
        • 2.Qb2#
      • 1...Sxe5!
    • 1.Sg5?
      • threat
        • 2.Sf3#
      • 1...Ke5
        • 2.Qd5#
      • 1...Se5
        • 2.Se6#
      • 1...Se1!
    • 1.Be6?
      • threat
        • 2.Qc4#
      • 1...Kxe4
        • 2.Qd5#
      • 1...Sb2
        • 2.Qe3#
      • 1...Se5
        • 2.Qe3#
      • 1...Sxf2!
    • 1.Qb2+?
      • 1...Kc4
        • 2.Sd6#
      • 1...Sxb2!
  • Keys
    • 1.Sd8!
      • threat
        • 2.Sc6#
      • 1...Ke5
        • 2.Qd5#
      • 1...Se5
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • K(c);S_FLIGHT,XS(G)::QAR1(B)
        • S(a);N_GUARD::QAR2(B),XP(b)
      • Refutation
        • S(a);XS(G)
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • K(c);S_FLIGHT::QAR1(B)
        • S(a);SBLOCK::S(G)
      • Refutation
        • S(a);
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT,XS(H)::QAR1(B)
      • Refutation
        • S(a);XS(H)
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • K(c);S_FLIGHT::QAR1(B)
        • S(a);SBLOCK::S(H)
      • Refutation
        • S(a);
    • Try
      • B(F);
      • Threat
        • QAR1(B)
      • Vars
        • K(c);P-FLIGHT,XP(D)::QAB1(B)
        • S(a);OGATE::QAB1(B)
      • Refutation
        • S(a);XP(A)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P-FLIGHT::S(H)
      • Refutation
        • S(a);XQ(B)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • K(c);S_FLIGHT::QAR1(B)
      • S(a);SBLOCK::S(H)
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