MESON Chess Problem Database

Problem Display
PID: 140795 (k7/2Q3P1/1p6/3q3r/Npp5/3n4/3R2r1/1K4bB w - - 0 1)

Kipping, Cyril Stanley

The Problemist, 1938

k7/2Q3P1/1p6/3q3r/Npp5/3n4/3R2r1/1K4bB

#2

6 + 9

3530 Het Half Pin Thema (II) 1947

SOLUTION

  • SOUND
  • Sets
    • 1...Qa5
      • 2.g8Q#
      • 2.g8R#
    • 1...Rxd2
      • 2.g8Q#
      • 2.g8R#
    • 1...Rf2
      • 2.Sxb6#
    • 1...Rgh2
      • 2.g8Q#
      • 2.g8R#
    • 1...Bh2
      • 2.Sxb6#
    • 1...Sf2
      • 2.Sxb6#
    • 1...Sc5
      • 2.Sxb6#
  • Keys
    • 1.Ra2!
      • threat
        • 2.Sxb6#
      • 1...Rb2+
        • 2.Sxb2#
      • 1...Rxa2
        • 2.g8Q#
        • 2.g8R#
      • 1...Qa5
        • 2.g8Q#
        • 2.g8R#
      • 1...b5
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(f);N_GUARD,P_SPINR(b)::P=Q
    • R(b);N_GUARD,P_SPINQ(f),XR(C)::P=Q
    • R(b);P_SPINQ(f),S_CUTB(a)::S(D),XP(h)
    • R(b);N_GUARD,P_SPINQ(f)::P=Q
    • B(a);N_GUARD::S(D),XP(h)
    • S(c);S_CUTB(a)::S(D),XP(h)
  • Actual
    • R(C);
    • Threat
      • R(C)+S(D),DCHECK,XP(h)
    • Vars
      • R(b);CHECK,P_SPINQ(f)::R(C)+S(D),XR(b)
      • R(b);N_GUARD,P_SPINQ(f),XR(C)::P=Q
      • Q(f);N_GUARD,P_SPINR(b)::P=Q
      • P(h);::R(C)+S(D),DCHECK
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Developed and maintained by Brian Stephenson.
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