MESON Chess Problem Database

Problem Display
PID: 170946 (BK3R2/3pb3/2P3rr/7p/R4B2/Q1N1Nk1P/4ppp1/5bq1 w - - 0 1)

Hartong, Jan

Comm., Problemisten, 1958

BK3R2/3pb3/2P3rr/7p/R4B2/Q1N1Nk1P/4ppp1/5bq1

#2

10 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bd6+
      • 2.c7#
    • 1...Bf6
      • 2.cxd7#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Sd2#
        • 2.Se5#
      • 1...Bd6+
        • 2.c7#
      • 1...Bf6
        • 2.Sd2#
      • 1...e1B
        • 2.Se5#
      • 1...e1R
        • 2.Sd2#
      • 1...Rg5
        • 2.Sd2#
      • 1...Rd6
        • 2.Se5#
      • 1...Re6
        • 2.Sd2#
      • 1...d6
        • 2.Sd2#
      • 1...e1Q!
    • 1.c7+?
      • 1...d5
        • 2.Bxd5#
      • 1...Rc6!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sd4#
      • 1...Bd6+
        • 2.c7#
      • 1...Bxf8
        • 2.Sh4#
      • 1...Rd6
        • 2.Sd5#
      • 1...Rf6
        • 2.Sh4#
      • 1...Bc5
        • 2.Sh4#
      • 1...Bf6
        • 2.cxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(k);CHECK,S_CUTP(j),S_CUTR(h)::B(H)+P(G)
    • B(k);S_CUTR(h)::B(H)+P(G),XP(j)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(k);CHECK,S_CUTP(j),S_CUTR(h)::B(H)+P(G)
        • B(k);::S(C)
        • P(c);::S(C)
        • R(h);::S(C)
        • P(j);::S(C)
      • Refutation
        • P(c);
    • Try
      • P(G);CHECK
      • Vars
        • P(j);P_SPINP(j)::B(H),XP(j)
      • Refutation
        • R(h);P_SPINR(h)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • B(k);CHECK,S_CUTP(j),S_CUTR(h)::B(H)+P(G)
      • B(k);N_GUARD,XR(J)::S(C)
      • R(h);S_CUTB(k)::QAR(A)+S(B)
      • R(h);S_CUTB(k)::S(C)
      • B(k);N_GUARD::S(C)
      • B(k);S_CUTR(h)::B(H)+P(G),XP(j)
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