MESON Chess Problem Database

Problem Display
PID: 121507 (8/8/8/kPR5/bn1Q3b/4pp2/8/1qn1B2K w - - 0 1)

Koloc, Jan

Ruch, 1948

8/8/8/kPR5/bn1Q3b/4pp2/8/1qn1B2K

#2

5 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe1
      • 2.Qd8#
    • 1...Bf2
      • 2.Qd8#
    • 1...Bd8
      • 2.Qxd8#
  • Tries
    • 1.Rd5?
      • threat
        • 2.Qa7#
      • 1...Qg6
        • 2.Bxb4#
      • 1...Qh7
        • 2.Bxb4#
      • 1...Bxe1!
    • 1.Rf5?
      • threat
        • 2.Qa7#
      • 1...Bxe1
        • 2.Qd8#
      • 1...Qxf5!
  • Keys
    • 1.Re5!
      • threat
        • 2.Qa7#
      • 1...Bxe1
        • 2.Qd8#
      • 1...Qg6
        • 2.Bxb4#
      • 1...Qh7
        • 2.Bxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(g);N_GUARD,N_SPINS(f),XB(A)::QAB(C)
    • B(g);N_GUARD::QAB(C)
    • B(g);N_GUARD::QAB(C),XB(g)
  • Tries
    • Try
      • R(E);
      • Threat
        • QAR2(C)
      • Vars
        • Q(a);N_GUARD::B(A),XS(f)
      • Refutation
        • B(g);N_SPINS(f),XB(A)
    • Try
      • R(E);
      • Threat
        • QAR2(C)
      • Vars
        • B(g);N_GUARD,N_SPINS(f),XB(A)::QAB(C)
      • Refutation
        • Q(a);XR(E)
  • Actual
    • R(E);
    • Threat
      • QAR2(C)
    • Vars
      • B(g);N_GUARD,N_SPINS(f),XB(A)::QAB(C)
      • Q(a);N_GUARD::B(A),XS(f)
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