MESON Chess Problem Database

Problem Display
PID: 140351 (2b1n1Nb/r5n1/3N4/R4pkP/R7/2Q1P3/8/K2B4 w - - 0 1)

Kofman, Rafael Moiseevich

Umnov, Evgeny Ivanovich

Shakhmatna misl, 1947

2b1n1Nb/r5n1/3N4/R4pkP/R7/2Q1P3/8/K2B4

#2

9 + 7

113 Shakhmaty v SSSR 1949

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa5
      • 2.Sf7#
    • 1...Ra6
      • 2.Sf7#
    • 1...Rf7
      • 2.Sxf7#
    • 1...Ra8
      • 2.Sf7#
    • 1...Bb7
      • 2.Sf7#
    • 1...Bd7
      • 2.Sf7#
    • 1...Sxh5
      • 2.Rg4#
    • 1...Se6
      • 2.Rxf5#
    • 1...Sxd6
      • 2.Qf6#
    • 1...Sf6
      • 2.Qxf6#
    • 1...Sc7
      • 2.Sf7#
      • 2.Qf6#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qf4#
        • 2.Qg4#
        • 2.Qh4#
      • 1...Rxa5
        • 2.Sf7#
        • 2.Qf4#
        • 2.Qh4#
      • 1...Se6
        • 2.Rxf5#
      • 1...Sf6
        • 2.Qxf6#
        • 2.Qf4#
        • 2.Qh4#
      • 1...Sxh5!
    • 1.Qe5?
      • threat
        • 2.Qg3#
        • 2.Qf4#
      • 1...Sxh5
        • 2.Rg4#
      • 1...Sf6
        • 2.Qf4#
        • 2.Qxf6#
      • 1...Se6!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qg2#
      • 1...Sxh5
        • 2.Rg4#
      • 1...Bb7
        • 2.Sf7#
      • 1...Se6
        • 2.Rxf5#
      • 1...Sf6
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • R(c);N_GUARD,N_SPINP(a),P_PINR(E),XR(F)::S(H)
    • R(c);N_GUARD::S(H)
    • R(c);N_GUARD::S(H),XR(c)
    • B(e);S_CUTR(c)::S(H)
    • S(d);P_PINQ(C),SBLOCK,XP(G)::R1(E)
    • S(d);N_GUARD,P_PINQ(C),S_CUTB(e)::R1(F),XP(a)
    • S(f);N_GUARD,XS(H)::QAB1(C)
    • S(f);N_GUARD::QAB1(C),XS(f)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Vars
        • S(d);N_GUARD,P_PINQ(C),S_CUTB(e)::R1(F),XP(a)
      • Refutation
        • S(d);P_PINQ(C),XP(G)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(d);P_PINQ(C),SBLOCK,XP(G)::R1(E)
      • Refutation
        • S(d);P_PINQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR(C)
    • Vars
      • S(d);P_PINQ(C),SBLOCK,XP(G)::R1(E)
      • B(e);S_CUTR(c)::S(H)
      • S(d);N_GUARD,P_PINQ(C),S_CUTB(e)::R1(F),XP(a)
      • S(f);N_GUARD::QAB1(C),XS(f)
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