MESON Chess Problem Database

Problem Display
PID: 70894 (K4NB1/b7/7R/2kpn3/P6R/7p/3P1p1r/4B1Q1 w - - 0 1)

Ellerman, Arnoldo

Peris Pardo, Julio

4th Prize, White MT (B), 1952-1953

K4NB1/b7/7R/2kpn3/P6R/7p/3P1p1r/4B1Q1

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Sd7#
    • 1...Sf3
      • 2.Sd7#
    • 1...Sc4
      • 2.d4#
    • 1...Sc6
      • 2.Sd7#
    • 1...Sd7
      • 2.Sxd7#
    • 1...Sf7
      • 2.Sd7#
  • Tries
    • 1.Qxf2+?
      • 1...d4
        • 2.Qxd4#
      • 1...Rxf2!
    • 1.Qg7?
      • threat
        • 2.Qxa7#
        • 2.Qe7#
      • 1...Sc4
        • 2.d4#
      • 1...Sg4
        • 2.Qc3#
      • 1...Sc6
        • 2.Sd7#
      • 1...Sg6
        • 2.Qc7#
      • 1...d4
        • 2.Qe7#
      • 1...Bb6
        • 2.Qe7#
      • 1...Sd7
        • 2.Sxd7#
        • 2.Qc3#
        • 2.Qd4#
        • 2.Qe7#
      • 1...Sf7
        • 2.Sd7#
        • 2.Qc3#
        • 2.Qd4#
      • 1...Bb8!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qa3#
      • 1...Sc4
        • 2.d4#
      • 1...Sg4
        • 2.Qc3#
      • 1...Sc6
        • 2.Sd7#
      • 1...Sg6
        • 2.Qc7#
      • 1...Sd3
        • 2.Sd7#
        • 2.Qd6#
        • 2.Qc7#
      • 1...Sf3
        • 2.Sd7#
        • 2.Qd6#
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(f);N_GUARD::S(H)
    • S(f);SBLOCK::P(C)
    • S(f);N_GUARD::S(H),XS(f)
  • Tries
    • Try
      • Q(B);CHECK,XP(a)
      • Vars
        • P(e);P_SPINP(e)::QAB1(B),XP(e)
      • Refutation
        • R(b);XQ(B)
    • Try
      • Q(B);N_PINP(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(f);SBLOCK::P(C)
        • S(f);OGATE::QAR2(B)
        • S(f);N_GUARD::S(H)
        • S(f);N_GUARD::QAR2(B)
        • P(e);::QAB(B)
        • B(g);::QAB(B)
      • Refutation
        • B(g);
  • Actual
    • Q(B);N_PINP(a)
    • Threat
      • QAB(B)
    • Vars
      • S(f);SBLOCK::P(C)
      • S(f);N_GUARD::QAR2(B)
      • S(f);N_GUARD::S(H)
      • S(f);OGATE::QAR2(B)
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