MESON Chess Problem Database

Problem Display
PID: 85768 (3k1B2/7r/3N4/8/B7/2Q4b/8/K7 w - - 0 1)

Speckmann, Werner

Stella Polaris, 1966

3k1B2/7r/3N4/8/B7/2Q4b/8/K7

#2

5 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rh4
      • 2.Sb7#
      • 2.Sf7#
      • 2.Qa5#
    • 1...Rh5
      • 2.Sb7#
      • 2.Sf7#
    • 1...Rh6
      • 2.Sb7#
      • 2.Sf7#
      • 2.Qa5#
    • 1...Rb7
      • 2.Sxb7#
    • 1...Rd7
      • 2.Qc8#
    • 1...Rf7
      • 2.Sxf7#
    • 1...Rh8
      • 2.Sb7#
      • 2.Sf7#
      • 2.Qa5#
    • 1...Bf1
      • 2.Qc8#
    • 1...Bg2
      • 2.Qc8#
    • 1...Bd7
      • 2.Qa5#
    • 1...Bc8
      • 2.Qxc8#
  • Tries
    • 1.Qf6+?
      • 1...Re7
        • 2.Qxe7#
      • 1...Kc7!
  • Keys
    • 1.Bd7!
      • threat
        • 2.Qc8#
      • 1...Kxd7
        • 2.Qc8#
      • 1...Bxd7
        • 2.Qa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::S(D),XR(b)
    • R(b);S_CUTB(a)::QAR1(B)
    • B(a);N_GUARD::QAR1(B)
    • B(a);S_CUTR(b)::QAB(B)
    • B(a);N_GUARD::QAR1(B),XB(a)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(B),XR(b)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • B(C);
    • Threat
      • QAR1(B)
    • Vars
      • K(c);P-FLIGHT,XB(C)::QAB1(B)
      • B(a);SBLOCK,XB(C)::QAB(B)
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