MESON Chess Problem Database

Problem Display
PID: 250054 (6b1/B2Q2nr/7n/3p3P/2PPkpp1/K2Nq3/3PP3/1B2R3 w - - 0 1)

Cristoffanini, Guido

Chemnitzer Tageblatt, 1927

(First published on Sun Jan 30 1927)

6b1/B2Q2nr/7n/3p3P/2PPkpp1/K2Nq3/3PP3/1B2R3

#2

11 + 9

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Sc1#
      • 2.Sb2#
      • 2.Sf2#
      • 2.Sb4#
      • 2.Se5#
    • 1...Qf2
      • 2.Sc1#
      • 2.Sb2#
      • 2.Sxf2#
      • 2.Sb4#
      • 2.Se5#
    • 1...Qxe2
      • 2.Se5#
    • 1...Qxd3+
      • 2.Bxd3#
    • 1...Sf7
      • 2.Qxd5#
    • 1...Se6
      • 2.Qxd5#
  • Tries
    • 1.Qxg7?
      • threat
        • 2.Qe5#
      • 1...Qxd3+
        • 2.Bxd3#
      • 1...Kf5
        • 2.Qg6#
      • 1...Qxd4
        • 2.Sf2#
        • 2.Sc5#
      • 1...Qxe2
        • 2.Se5#
      • 1...Sf7
        • 2.Qg6#
      • 1...Rxg7!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qe5#
      • 1...Qxd3+
        • 2.Bxd3#
      • 1...Kf5
        • 2.Qg6#
      • 1...Qxd4
        • 2.Sf2#
        • 2.Sc5#
        • 2.Qxf4#
      • 1...Qxe2
        • 2.Se5#
        • 2.Qxf4#
      • 1...Sf7
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(a);N_PINS(F),P_SPINQ(a),XP(D)::B(A)+S(F)
    • Q(a);CHECK,OGATE,P_SPINQ(a),XS(F)::B(A),XQ(a)
    • S(f);S_CUTB(i)::QAB1(K),XP(e)
    • S(g);S_CUTB(i)::QAB1(K),XP(e)
  • Tries
    • Try
      • Q(K);XS(g)
      • Threat
        • QAR1(K)
      • Vars
        • Q(a);CHECK,OGATE,P_SPINQ(a),XS(F)::B(A),XQ(a)
        • K(b);S_CUTS(f),S_FLIGHT::QAB1(K)
        • Q(a);N_PINS(F),P_SPINQ(a),XP(D)::B(A)+S(F)
        • S(f);N_GUARD::QAB(K)
      • Refutation
        • R(h);XQ(K)
  • Actual
    • Q(K);
    • Threat
      • QAR1(K)
    • Vars
      • Q(a);CHECK,OGATE,P_SPINQ(a),XS(F)::B(A),XQ(a)
      • K(b);S_CUTS(f),S_CUTS(g),S_FLIGHT::QAB1(K)
      • S(f);S_CUTB(i)::QAB1(K),XP(e)
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