MESON Chess Problem Database

Problem Display
PID: 69199 (6r1/3PBkp1/2p3q1/8/2RQ4/1B1p1P2/8/3KR3 w - - 0 1)

Pierce, William Timbrell

The Chess Player's Chronicle (Sampson), 1874

6r1/3PBkp1/2p3q1/8/2RQ4/1B1p1P2/8/3KR3

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qh7
      • 2.Rxc6#
    • 1...Qg1
      • 2.Rxc6#
    • 1...Qg2
      • 2.Rxc6#
    • 1...Qg3
      • 2.Rxc6#
  • Tries
    • 1.Qxg7+?
      • 1...Qxg7
        • 2.Rg4#
        • 2.Rxc6#
      • 1...Rxg7
        • 2.Rf4#
      • 1...Kxg7!
    • 1.Qf4+?
      • 1...Qf5
        • 2.Rxc6#
        • 2.Qxf5#
      • 1...Qf6!
    • 1.Qd5+?
      • 1...Qe6
        • 2.Qxe6#
      • 1...cxd5!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Rf4#
      • 1...Qxg4
        • 2.Rxg4#
      • 1...Qe4
        • 2.Rcxe4#
      • 1...Qg5
        • 2.Qe6#
      • 1...Qe6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD::B(C)+R(E),XP(b)
    • Q(c);N_GUARD,P_PINR(B)::B(C)+R(E),XP(b)
  • Tries
    • Try
      • Q(F);CHECK,XP(e)
      • Vars
        • R(f);SBLOCK,XQ(F)::B(C)+R(E),DCHECK
      • Refutation
        • K(d);P-FLIGHT,XQ(F)
    • Try
      • Q(F);CHECK
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • Q(F);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAB1(F),XQ(c)
      • Refutation
        • P(b);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • B(C)+R(E),DCHECK
    • Vars
      • Q(c);OGATE,P_PINP(D),XQ(F)::B(C)+R(E),XQ(c)
      • Q(c);N_GUARD::B(C)+R(E),XQ(c)
      • Q(c);N_GUARD::QAB1(F)
      • Q(c);N_GUARD::QAB1(F),XQ(c)
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Developed and maintained by Brian Stephenson.
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