MESON Chess Problem Database

Problem Display
PID: 9472 (4R3/5pp1/2N2kbp/KQ6/1P2p3/2b3R1/pB3r2/q7 w - - 0 1)

Pirnie, Duncan

Birmingham Post, 1904

(First published on Fri Jul 8 1904)

4R3/5pp1/2N2kbp/KQ6/1P2p3/2b3R1/pB3r2/q7

#2

7 + 10

3979 Systematic Terminology 1984
3207 A R Gooderson An English Progressive 1996
14868 Pirnie Collection 2012
56 The Problemist 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Bxc3#
    • 1...Qf1
      • 2.Bxc3#
    • 1...Qg1
      • 2.Bxc3#
    • 1...Qh1
      • 2.Bxc3#
    • 1...Be5
      • 2.Qxe5#
    • 1...h5
      • 2.Qg5#
  • Keys
    • 1.Qb6!
      • threat
        • 2.Sd4#
      • 1...Rf5+
        • 2.Se5#
      • 1...Kf5
        • 2.Qxf2#
      • 1...Bd4
        • 2.Sxd4#
      • 1...Be5
        • 2.Se7#
      • 1...Bf5
        • 2.Qd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::B(A),XB(d)
    • B(d);N_GUARD,N_PINP(C)::QAB1(E),XB(d)
    • P(h);N_GUARD::QAB1(E)
  • Actual
    • Q(E);
    • Threat
      • QAR(E)+S(F)
    • Vars
      • R(c);CHECK,SBLOCK::QAR(E)+S(F)
      • K(f);N_SPINB(d),P-FLIGHT::QAR(E),XR(c)
      • B(d);N_PINP(C)::QAR(E)+S(F),XB(d)
      • B(d);N_PINP(C)::QAR(E)+S(F)
      • B(g);SBLOCK::QAB(E)
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