MESON Chess Problem Database

Problem Display
PID: 50771 (5N1b/2qpB2B/2p1pP2/Rn1pk3/1p5Q/4n2p/4R1b1/2K5 w - - 0 1)

Mochalkin, Oleksandr Viktorovich

Shanshin, Valery Yurevich

Sachova skladba, 1991

5N1b/2qpB2B/2p1pP2/Rn1pk3/1p5Q/4n2p/4R1b1/2K5

#2

8 + 12

4827 FIDE Album (1989-1991) 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa5
      • 2.Sxd7#
    • 1...Qb6
      • 2.Sxd7#
    • 1...Qb8
      • 2.Sxd7#
    • 1...Bf1
      • 2.Rxe3#
    • 1...Bxf6
      • 2.Qxf6#
    • 1...Sd4
      • 2.Qg3#
    • 1...d4
      • 2.Qg5#
  • Tries
    • 1.Bc5?
      • threat
        • 2.Qg5#
      • 1...Bxf6
        • 2.Qg3#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sd6
        • 2.Bd4#
        • 2.Qd4#
      • 1...Be4!
    • 1.Bb1?
      • threat
        • 2.Sg6#
      • 1...d4
        • 2.Qg5#
      • 1...Be4!
    • 1.Bc2?
      • threat
        • 2.Sg6#
      • 1...d4
        • 2.Qg5#
      • 1...Be4!
    • 1.Bd3?
      • threat
        • 2.Sg6#
      • 1...d4
        • 2.Qg5#
      • 1...Be4!
    • 1.Qg4?
      • threat
        • 2.Sg6#
      • 1...d4
        • 2.Qg5#
      • 1...Be4!
  • Keys
    • 1.Rd2!
      • threat
        • 2.Qg3#
      • 1...d4
        • 2.Qxd4#
      • 1...Sf1
        • 2.Qg5#
      • 1...Sf5
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(j);N_GUARD,XR(D)::S(H),XP(k)
    • Q(j);N_GUARD::S(H),XP(k)
    • B(a);N_GUARD::R(B),XS(b)
    • B(l);OGATE,XP(E)::QAB1(C),XB(l)
    • S(e);P_SPINP(f),SBLOCK::QAB(C)
    • P(f);SBLOCK::QAR2(C)
  • Tries
    • Try
      • B(F);
      • Threat
        • QAR2(C)
      • Vars
        • B(l);SBLOCK,XP(E)::QAB(C)
        • S(e);N_GUARD::QAB1(C),XS(e)
      • Refutation
        • B(a);N_SPINS(b)
    • Try
      • B(G);
      • Threat
        • S(H)
      • Vars
        • P(f);SBLOCK::QAR2(C)
      • Refutation
        • B(a);N_SPINS(b)
    • Try
      • B(G);
      • Threat
        • S(H)
      • Vars
        • P(f);SBLOCK::QAR2(C)
      • Refutation
        • B(a);N_SPINS(b)
    • Try
      • B(G);
      • Threat
        • S(H)
      • Vars
        • P(f);SBLOCK::QAR2(C)
      • Refutation
        • B(a);N_SPINS(b)
    • Try
      • Q(C);
      • Threat
        • S(H)
      • Vars
        • P(f);SBLOCK::QAR2(C)
      • Refutation
        • B(a);N_SPINS(b)
  • Actual
    • R(B);N_PINS(b)
    • Threat
      • QAB(C)
    • Vars
      • P(f);P_SPINS(e)::QAB1(C),XP(f)
      • S(b);N_GUARD::QAR2(C)
      • S(b);SBLOCK::S(H)
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