MESON Chess Problem Database

Problem Display
PID: 87890 (3b4/Qp3R2/1nB5/K1nr4/2pk1BR1/1p2p1N1/1P2P3/8 w - - 0 1)

Westbury, Eric Ernest

The Problemist, 1937

3b4/Qp3R2/1nB5/K1nr4/2pk1BR1/1p2p1N1/1P2P3/8

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Sxf5#
    • 1...Rd6
      • 2.Sf5#
    • 1...Rd7
      • 2.Sf5#
    • 1...Sa4+
      • 2.Bc7#
    • 1...Sd7+
      • 2.Bc7#
    • 1...Sa8+
      • 2.Bc7#
    • 1...Sc8+
      • 2.Bc7#
  • Tries
    • 1.Sf5+?
      • 1...Ke4
        • 2.Bh2#
        • 2.Bg3#
        • 2.Bd6#
        • 2.Bc7#
        • 2.Bb8#
      • 1...Rxf5!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Be5#
      • 1...Sd3+
        • 2.Rxd5#
      • 1...Sca4+
        • 2.Rxd5#
      • 1...Se4+
        • 2.Rxd5#
      • 1...Sa6+
        • 2.Rxd5#
      • 1...Se6+
        • 2.Rxd5#
      • 1...Scd7+
        • 2.Rxd5#
      • 1...Sba4+
        • 2.Bc7#
      • 1...Sbd7+
        • 2.Bc7#
      • 1...Sa8+
        • 2.Bc7#
      • 1...Sc8+
        • 2.Bc7#
      • 1...Rxf5
        • 2.Sxf5#
      • 1...Re5
        • 2.Bxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • R(f);N_GUARD::S(C),XR(f)
    • R(f);N_GUARD::S(C)
    • S(g);CHECK,P_SPINS(e)::R(E)+B(D)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • R(f);XS(C)
  • Actual
    • R(I);
    • Threat
      • R(E)+B(D),DCHECK
    • Vars
      • S(e);CHECK,P_SPINS(g)::R1(I),XR(f)
      • S(g);CHECK,P_SPINS(e)::R(E)+B(D)
      • R(f);XR(I)::S(C),XR(f)
      • R(f);::R(E)+B(D),DCHECK,XR(f)
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