MESON Chess Problem Database

Problem Display
PID: 85578 (8/8/B2R4/5p1Q/4kP2/2n1r1P1/3B4/2N3bK w - - 0 1)

Petrov, Evgeny Aleksandrovich

Boletim da UBP, 1965

8/8/B2R4/5p1Q/4kP2/2n1r1P1/3B4/2N3bK

#2

8 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Bd3#
    • 1...Re2
      • 2.Bd3#
    • 1...Rd3
      • 2.Bxd3#
    • 1...Rf3
      • 2.Qe8#
    • 1...Sb1
      • 2.Bb7#
    • 1...Sd1
      • 2.Bb7#
    • 1...Sa2
      • 2.Bb7#
    • 1...Se2
      • 2.Bb7#
    • 1...Sa4
      • 2.Bb7#
    • 1...Sb5
      • 2.Bb7#
  • Tries
    • 1.Sb3?
      • threat
        • 2.Sc5#
        • 2.Rd4#
      • 1...Re1
        • 2.Bd3#
      • 1...Re2
        • 2.Bd3#
      • 1...Rd3
        • 2.Bxd3#
      • 1...Rf3
        • 2.Qe8#
      • 1...Se2
        • 2.Sc5#
        • 2.Bb7#
      • 1...Sa4
        • 2.Bb7#
        • 2.Rd4#
      • 1...Sb5
        • 2.Sc5#
        • 2.Bb7#
      • 1...Sd5
        • 2.Re6#
      • 1...Rxg3!
  • Keys
    • 1.Se2!
      • threat
        • 2.Rd4#
      • 1...Rxe2
        • 2.Bd3#
      • 1...Rxg3
        • 2.Sxg3#
      • 1...Sxe2
        • 2.Bb7#
      • 1...Rd3
        • 2.Bxd3#
      • 1...Rf3
        • 2.Qe8#
      • 1...Sb5
        • 2.Bb7#
      • 1...Sd5
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(c);N_GUARD::B(G)
    • R(c);N_GUARD::B(G),XR(c)
    • R(c);SBLOCK::QAR(F)
    • S(b);N_GUARD::B(G)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);N_GUARD::B(G)
        • R(c);N_GUARD::B(G),XR(c)
        • R(c);SBLOCK::QAR(F)
        • S(b);SBLOCK::R(H)
      • Refutation
        • R(c);XP(D)
  • Actual
    • S(A);
    • Threat
      • R1(H)
    • Vars
      • R(c);N_GUARD,XS(A)::B(G)
      • R(c);XP(D)::S(A),XR(c)
      • S(b);N_GUARD,XS(A)::B(G)
      • R(c);N_GUARD::B(G),XR(c)
      • R(c);SBLOCK::QAR(F)
      • S(b);N_GUARD::B(G)
      • S(b);SBLOCK::R(H)
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