MESON Chess Problem Database

Problem Display
PID: 108678 (1B4kr/5qp1/6Pn/8/R1Q5/8/8/6K1 w - - 0 1)

Kopac, Lubos

Zpravodaj Kotva, 1967

1B4kr/5qp1/6Pn/8/R1Q5/8/8/6K1

#2

5 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sg4
      • 2.Qxf7#
    • 1...Sf5
      • 2.Qxf7#
  • Tries
    • 1.Qc8+?
      • 1...Qe8
        • 2.Qxe8#
      • 1...Qf8!
  • Keys
    • 1.Ra8!
      • threat
        • 2.Bh2#
        • 2.Bg3#
        • 2.Bf4#
        • 2.Be5#
        • 2.Bd6#
        • 2.Ba7#
        • 2.Bc7#
      • 1...Kf8
        • 2.Bd6#
      • 1...Qxc4
        • 2.Bc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::QAB1(C),XQ(b)
  • Tries
    • Try
      • Q(C);CHECK,N_PINQ(b)
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAR2(C),XQ(b)
      • Refutation
        • Q(b);P_SPINQ(b)
  • Actual
    • R(B);
    • Threat
      • DUALS(7)
    • Vars
      • K(d);N_SPINQ(b),P-FLIGHT::R(B)+B(E),DCHECK
      • Q(b);N_SPINQ(b),XQ(C)::R(B)+B(E)
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Developed and maintained by Brian Stephenson.
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