MESON Chess Problem Database

Problem Display
PID: 6838 (2N1QB1b/3p1p1B/R5r1/1n1kP1p1/R7/1P2P3/1NP2n2/K7 w - - 0 1)

Kofman, Rafael Moiseevich

Loshinski, Lev Ilich

1st Prize, Belarus Physical Culture Council TT, 1934

2N1QB1b/3p1p1B/R5r1/1n1kP1p1/R7/1P2P3/1NP2n2/K7

#2

12 + 8

3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Rf6
      • 2.c4#
    • 1...Rh6
      • 2.c4#
    • 1...Rg7
      • 2.c4#
    • 1...Rg8
      • 2.c4#
    • 1...Sd1
      • 2.e4#
    • 1...Sh1
      • 2.e4#
    • 1...Sd3
      • 2.e4#
    • 1...Sh3
      • 2.e4#
    • 1...Se4
      • 2.c4#
    • 1...Sg4
      • 2.e4#
    • 1...Sa3
      • 2.Rd4#
    • 1...Sc3
      • 2.Rd4#
    • 1...Sd4
      • 2.Rxd4#
    • 1...Sa7
      • 2.Rd4#
    • 1...Sc7
      • 2.Rd4#
  • Tries
    • 1.Sb6+?
      • 1...Kc6
        • 2.Qxd7#
      • 1...Rxb6!
    • 1.Se7+?
      • 1...Kc5
        • 2.Rc4#
        • 2.b4#
      • 1...Kxe5!
    • 1.Qxd7+?
      • 1...Kxe5
        • 2.Qxb5#
      • 1...Sd6
        • 2.R6a5#
      • 1...Rd6!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Se7#
      • 1...Bxe5+
        • 2.Qxe5#
      • 1...Rxa6
        • 2.Sb4#
      • 1...Sxd3
        • 2.e4#
      • 1...Rb6
        • 2.Sb4#
      • 1...Sd4
        • 2.Rxd4#
      • 1...Rc6
        • 2.Sb4#
      • 1...Rd6
        • 2.c4#
      • 1...Re6
        • 2.c4#
      • 1...Bf6
        • 2.Qxf7#
      • 1...Sd6
        • 2.Rd4#
      • 1...d6
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 13
  • Sets
    • R(e);::P(C)
    • S(a);N_GUARD::P(E)
    • S(a);SBLOCK::P(C)
    • S(b);N_GUARD::R1(F)
    • S(b);N_GUARD::R1(F),XS(b)
  • Tries
    • Try
      • S(J);CHECK
      • Vars
        • K(c);P_SPINP(f),S_FLIGHT::QAB1(K),XP(f)
      • Refutation
        • R(e);XS(J)
    • Try
      • S(J);CHECK
      • Refutation
        • K(c);P-FLIGHT,XP(G)
    • Try
      • Q(K);CHECK,XP(f)
      • Vars
        • K(c);P-FLIGHT,XP(G)::QAR(K),XS(b)
        • S(b);P_SPINS(b),S_CUTR(e)::R(H)
      • Refutation
        • R(e);P_SPINR(e)
  • Actual
    • S(B);P_SPINP(G)
    • Threat
      • S(J)
    • Vars
      • B(h);CHECK,OGATE,XP(G)::QAR1(K),XB(h)
      • R(e);P_PINR(F),XR(H)::S(B)
      • S(a);N_GUARD,XS(B)::P(E)
      • R(e);::S(B)
      • S(b);N_GUARD,N_PINP(G)::R1(F),XS(b)
      • R(e);::P(C)
      • B(h);S_CUTR(e)::QAB(K),XP(g)
      • S(b);N_GUARD::R1(F)
      • P(f);S_CUTR(e)::S(J)
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