MESON Chess Problem Database

Problem Display
PID: 244816 (n7/3NK2p/5P2/1B1kp3/r2Pn3/6Br/2P1N1Qb/8 w - - 0 1)

Feoktistov, Aleksandr Fedorovich

Shakhmaty (Riga), 1968

n7/3NK2p/5P2/1B1kp3/r2Pn3/6Br/2P1N1Qb/8

#2

9 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.c4#
    • 1...Ra2
      • 2.c4#
    • 1...Ra3
      • 2.c4#
    • 1...Rxd4
      • 2.Sc3#
    • 1...Ra5
      • 2.c4#
    • 1...Ra6
      • 2.c4#
    • 1...Ra7
      • 2.c4#
    • 1...Sb6
      • 2.Sxb6#
    • 1...Sc7
      • 2.Sb6#
    • 1...exd4
      • 2.Sf4#
  • Tries
    • 1.Bf2?
      • threat
        • 2.Qg8#
      • 1...Ra6
        • 2.c4#
      • 1...Bg3
        • 2.Sc3#
      • 1...Sc7
        • 2.Sb6#
      • 1...Rg3!
    • 1.Bxh2?
      • threat
        • 2.Qg8#
      • 1...Ra6
        • 2.c4#
      • 1...Sc7
        • 2.Sb6#
      • 1...Rg3!
    • 1.f7?
      • threat
        • 2.Sf6#
      • 1...Rxd4
        • 2.Sc3#
      • 1...exd4
        • 2.Sf4#
      • 1...Ra6
        • 2.c4#
      • 1...Ra7
        • 2.c4#
      • 1...Rh6!
  • Keys
    • 1.Bxe5!
      • threat
        • 2.Qg8#
      • 1...Rg3
        • 2.Sf4#
      • 1...Ra6
        • 2.c4#
      • 1...Bg3
        • 2.Sc3#
      • 1...Sc7
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(c);N_GUARD::P(A)
    • R(c);SBLOCK,XP(E)::S(B)
    • R(c);N_GUARD,P_PINS(H)::P(A)
    • S(h);N_GUARD::S(H),XS(h)
    • S(h);N_GUARD::S(H)
    • P(f);N_GUARD,SBLOCK,XP(E)::S(B)
  • Tries
    • Try
      • B(D);
      • Threat
        • QAB(C)
      • Vars
        • R(c);N_GUARD::P(A)
        • B(a);S_CUTR(b)::S(B)
        • S(h);N_GUARD::S(H)
      • Refutation
        • R(b);
    • Try
      • B(D);XB(a)
      • Threat
        • QAB(C)
      • Vars
        • R(c);N_GUARD::P(A)
        • S(h);N_GUARD::S(H)
      • Refutation
        • R(b);
    • Try
      • P(G);
      • Threat
        • S(H)
      • Vars
        • R(c);SBLOCK,XP(E)::S(B)
        • P(f);N_GUARD,SBLOCK,XP(E)::S(B)
        • R(c);N_GUARD::P(A)
        • R(c);N_GUARD,P_PINS(H)::P(A)
      • Refutation
        • R(b);
  • Actual
    • B(D);XP(f)
    • Threat
      • QAB(C)
    • Vars
      • R(b);S_CUTB(a)::S(B)
      • R(c);N_GUARD::P(A)
      • B(a);S_CUTR(b)::S(B)
      • S(h);N_GUARD::S(H)
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