MESON Chess Problem Database

Problem Display
PID: 11568 (1bBN1B2/p7/1k5p/7r/PP6/8/2QNP3/3K3b w - - 0 1)

Nanning, Frederik Willem

1st Prize, Nederlandse Bond van Probleemvrienden 011. TT, 1939

1bBN1B2/p7/1k5p/7r/PP6/8/2QNP3/3K3b

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rh2
      • 2.Qc5#
    • 1...Rh3
      • 2.Qc5#
    • 1...Rh4
      • 2.Qc5#
    • 1...Rc5
      • 2.Qxc5#
    • 1...Rd5
      • 2.Qc6#
    • 1...Bd5
      • 2.Qc5#
    • 1...Bc6
      • 2.Qxc6#
    • 1...Be5
      • 2.Qc5#
    • 1...Bc7
      • 2.Sc4#
  • Tries
    • 1.Bc5+?
      • 1...Rxc5
        • 2.Qxc5#
      • 1...Kc7!
    • 1.Qc7+?
      • 1...Bxc7
        • 2.Sc4#
      • 1...Kxc7!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Sc4#
      • 1...Bb7
        • 2.Qxb7#
      • 1...Rh4
        • 2.Bc5#
      • 1...Rc5
        • 2.Bxc5#
      • 1...Rd5
        • 2.Qb7#
      • 1...Bd5
        • 2.Bc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(b);N_GUARD::QAB1(B)
    • R(b);N_GUARD::QAB1(B),XR(b)
    • R(b);P_PINS(C),S_CUTB(a)::QAR1(B)
    • B(a);S_CUTR(b)::QAB1(B)
    • B(a);N_GUARD::QAR1(B),XB(a)
    • B(f);S_CUTR(b)::QAB1(B)
    • B(f);SBLOCK::S(C)
  • Tries
    • Try
      • B(I);CHECK
      • Vars
        • R(b);OGATE,XB(I)::QAB1(B),XR(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • B(f);SBLOCK,XQ(B)::S(C)
      • Refutation
        • K(c);S_FLIGHT,XQ(B)
  • Actual
    • Q(B);
    • Threat
      • S(C)
    • Vars
      • B(a);N_GUARD::QAR1(B),XB(a)
      • R(b);N_GUARD::B(I)
      • R(b);N_GUARD::B(I),XR(b)
      • R(b);P_PINS(C),S_CUTB(a)::QAR1(B)
      • B(a);S_CUTR(b)::B(I)
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Developed and maintained by Brian Stephenson.
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