MESON Chess Problem Database

Problem Display
PID: 129710 (8/8/4rp2/8/4N1QK/7N/4p1Pp/3n1n1k w - - 0 1)

Cumpe, Josef

Lada, 1922

8/8/4rp2/8/4N1QK/7N/4p1Pp/3n1n1k

#2

5 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Sef2#
    • 1...Sf2
      • 2.Sexf2#
    • 1...Sc3
      • 2.Sef2#
    • 1...Sde3
      • 2.Sef2#
  • Keys
    • 1.Qf3!
      • threat
        • 2.g3#
        • 2.g4#
      • 1...Rxe4+
        • 2.g4#
      • 1...e1Q+
        • 2.g3#
      • 1...e1B+
        • 2.g3#
      • 1...e1S
        • 2.Qxf1#
      • 1...Sde3
        • 2.Sef2#
      • 1...Sd2
        • 2.Sg3#
      • 1...Sfe3
        • 2.Sg3#
      • 1...Sg3
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::S(C)
    • S(a);N_GUARD::S(C),XS(a)
  • Actual
    • Q(D);
    • Threat
      • DUALS(2)
    • Vars
      • R(f);CHECK,XS(C)::QAB(D)+P(A)
      • P(d);CHECK::QAB(D)+P(A)
      • P(d);N_GUARD::QAR2(D),XS(b)
      • S(a);N_GUARD::S(C)
      • S(b);N_GUARD::S(C)
      • S(b);N_GUARD::S(C),XS(b)
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