MESON Chess Problem Database

Problem Display
PID: 120077 (krQ5/p7/B1b1R3/8/1n6/8/8/6K1 w - - 0 1)

Stepan, Ludvik

Ruch, 1947

krQ5/p7/B1b1R3/8/1n6/8/8/6K1

#2

4 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ba4
      • 2.Bb7#
    • 1...Bb5
      • 2.Bb7#
    • 1...Bb7
      • 2.Bxb7#
    • 1...Bd7
      • 2.Bb7#
    • 1...Be8
      • 2.Bb7#
  • Tries
    • 1.Rxc6?
      • threat
        • 2.Bb7#
      • 1...Rxc8
        • 2.Rxc8#
      • 1...Sxa6!
    • 1.Qxc6+?
      • 1...Rb7
        • 2.Re8#
        • 2.Qxb7#
      • 1...Sxc6!
  • Keys
    • 1.Re8!
      • threat
        • 2.Qxb8#
      • 1...Rxc8
        • 2.Rxc8#
      • 1...Bxe8
        • 2.Bb7#
      • 1...Sxa6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(b);N_GUARD::B(B)
    • B(b);N_GUARD::B(B),XB(b)
  • Tries
    • Try
      • R(C);XB(b)
      • Threat
        • B(B)
      • Vars
        • R(e);N_SPINR(e),OGATE,XQ(D)::R(C),XR(e)
      • Refutation
        • S(a);XB(B)
    • Try
      • Q(D);CHECK,N_PINR(e),XB(b)
      • Refutation
        • S(a);XQ(D)
  • Actual
    • R(C);
    • Threat
      • QAR1(D),XR(e)
    • Vars
      • R(e);OGATE,XQ(D)::R(C),XR(e)
      • B(b);N_GUARD,XR(C)::B(B)
      • S(a);N_GUARD,XB(B)::QAB(D),XB(b)
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