MESON Chess Problem Database

Problem Display
PID: 144164 (1n5K/1b6/5N1Q/RN2kP2/6p1/1p1P4/8/q4rB1 w - - 0 1)

Piper, GH

Western Morning News, 1938

(First published on Sat Oct 15 1938)

1n5K/1b6/5N1Q/RN2kP2/6p1/1p1P4/8/q4rB1

#2

8 + 7

14868 Pirnie Collection 2012
3713 Snap 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf5
      • 2.Sd4#
  • Tries
    • 1.Sa3+?
      • 1...Bd5
        • 2.Rxd5#
      • 1...Kd6!
    • 1.Sxg4+?
      • 1...Kd5+
        • 2.Sc3#
      • 1...Kxf5+!
    • 1.Sd7+?
      • 1...Kd5+
        • 2.Sc3#
      • 1...Kxf5+
        • 2.Sd4#
      • 1...Sxd7!
  • Keys
    • 1.Sh5!
      • threat
        • 2.Qe6#
      • 1...Kd5+
        • 2.Sc3#
      • 1...Kxf5+
        • 2.Sd4#
      • 1...Rxf5
        • 2.Qd6#
      • 1...Bd5
        • 2.Qf6#
      • 1...Bc8
        • 2.Sa3#

Anticipated by 9670(1907)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(e);P-FLIGHT,P_PINS(F),XP(E)::R(C)+S(D),DCHECK
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::R1(C),XB(f)
      • Refutation
        • K(e);P_PINS(F),S_FLIGHT
    • Try
      • S(F);CHECK,XP(d)
      • Vars
        • K(e);CHECK,P-FLIGHT::R(C)+S(D),DCHECK
      • Refutation
        • K(e);CHECK,P-FLIGHT,XP(E)
    • Try
      • S(F);CHECK
      • Vars
        • K(e);CHECK,P-FLIGHT::R(C)+S(D),DCHECK
        • K(e);CHECK,P-FLIGHT,XP(E)::R(C)+S(D),DCHECK
      • Refutation
        • S(g);XS(F)
  • Actual
    • S(F);
    • Threat
      • QAR1(G)
    • Vars
      • K(e);CHECK,P-FLIGHT::R(C)+S(D),DCHECK
      • K(e);CHECK,P-FLIGHT,XP(E)::R(C)+S(D),DCHECK
      • R(b);SBLOCK,XP(E)::QAB1(G)
      • B(f);SBLOCK::QAB1(G)
      • B(f);N_GUARD::R(C)+S(D)
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