MESON Chess Problem Database

Problem Display
PID: 188453 (4R3/b7/7K/3P4/4Np2/5pB1/1r3P2/3rkN1R w - - 0 1)

Johner, Hans

Schweizerische Schachzeitung, 1969

4R3/b7/7K/3P4/4Np2/5pB1/1r3P2/3rkN1R

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ke2
      • 2.Sc5#
    • 1...Rb1
      • 2.Sc5#
    • 1...Re2
      • 2.Sfd2#
      • 2.Sh2#
      • 2.Se3#
    • 1...Rxf2
      • 2.Sc5#
    • 1...Rb5
      • 2.Sc5#
    • 1...Rb6+
      • 2.Sd6#
    • 1...Bxf2
      • 2.Sed2#
    • 1...fxg3
      • 2.Sfxg3#
  • Tries
    • 1.Sg5+?
      • 1...Re2
        • 2.Sxf3#
      • 1...Be3!
  • Keys
    • 1.Bh4!
      • threat
        • 2.Sfg3#
      • 1...Rb6+
        • 2.Sd6#
      • 1...Ke2
        • 2.Sc5#
      • 1...Rxf2
        • 2.Sc5#
      • 1...Bxf2
        • 2.Sed2#

This is after

After Gulyaev.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • K(b);P-FLIGHT::R(H)+S(E)
    • R(c);N_GUARD::R(H)+S(E)
    • R(c);N_GUARD,P_SPINR(c),XP(C)::R(H)+S(E)
    • R(c);CHECK,N_GUARD,S_CUTB(f)::R(H)+S(E)
    • B(f);N_GUARD,P_SPINB(f),XP(C)::R(H)+S(E)
    • P(e);XB(D)::R(B)+S(A),XP(e)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • R(c);P_SPINR(c)::S(E),XP(d)
      • Refutation
        • B(f);P_SPINB(f)
  • Actual
    • B(D);
    • Threat
      • R(B)+S(A)
    • Vars
      • R(c);CHECK,N_GUARD,S_CUTB(f)::R(H)+S(E)
      • K(b);P-FLIGHT::R(H)+S(E)
      • R(c);N_GUARD,P_SPINR(c),XP(C)::R(H)+S(E)
      • B(f);N_GUARD,P_SPINB(f),XP(C)::R(H)+S(E)
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