MESON Chess Problem Database

Problem Display
PID: 18332 (B7/2rp1r2/8/4n3/pQ1pN3/2Nkn3/8/1K2R3 w - - 0 1)

Sonnenfeld, Felix Alexander

1st HM., BCF, 1955-1956

B7/2rp1r2/8/4n3/pQ1pN3/2Nkn3/8/1K2R3

#2

6 + 8

3976 FIDE Album (1956-1958) 1961

SOLUTION

  • SOUND
  • Tries
    • 1.Sf2+?
      • 1...Kd2
        • 2.Sce4#
        • 2.Re2#
      • 1...Rxf2!
    • 1.Sc5+?
      • 1...Kd2
        • 2.Sd1#
        • 2.Sa2#
        • 2.Se2#
        • 2.S3xa4#
        • 2.S3e4#
        • 2.Sb5#
        • 2.Sd5#
        • 2.Re2#
      • 1...Rxc5!
  • Keys
    • 1.Se2!
      • threat
        • 2.Qxd4#
      • 1...Rc1+
        • 2.Sxc1#
      • 1...Rb7
        • 2.Sc5#
      • 1...Sc2
        • 2.Sc1#
      • 1...S3c4
        • 2.Sc1#
      • 1...Sf5
        • 2.Sf4#
      • 1...Sc6
        • 2.Sc5#
      • 1...Rc4
        • 2.Qd2#
      • 1...Sf3
        • 2.Sf2#
      • 1...S5c4
        • 2.Sc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • R(h);XS(E)
    • Try
      • S(E);CHECK
      • Refutation
        • R(f);XS(E)
  • Actual
    • S(C);
    • Threat
      • QAR1(D),XP(d)
    • Vars
      • R(f);CHECK,N_GUARD::S(C),XR(f)
      • R(f);N_GUARD,P_PINQ(D)::S(E)
      • S(b);S_CUTR(f)::S(C)
      • S(b);S_CUTR(h)::S(C)
      • S(e);S_CUTR(f)::S(E)
      • R(f);SBLOCK::QAR1(D)
      • S(e);S_CUTR(h)::S(E)
      • S(e);S_CUTR(f)::S(C)
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