MESON Chess Problem Database

Problem Display
PID: 101421 (QK6/B7/1N6/8/PPPP1Pp1/4k1Pp/2b4R/rq1rNB2 w - - 0 1)

Sparke, Arthur M

Good Companions (January), 1917

QK6/B7/1N6/8/PPPP1Pp1/4k1Pp/2b4R/rq1rNB2

#2

13 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb4
      • 2.Sxc2#
    • 1...Rxd4
      • 2.Re2#
  • Tries
    • 1.Qg2?
      • threat
        • 2.Sd5#
      • 1...Kxd4
        • 2.Sd5#
      • 1...Qxb4
        • 2.Sxc2#
      • 1...Be4
        • 2.Qg1#
        • 2.Qf2#
      • 1...hxg2!
    • 1.Qf3+?
      • 1...Kxd4
        • 2.Sd5#
        • 2.Sd7#
        • 2.Sa8#
        • 2.Sc8#
      • 1...gxf3!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Sd5#
      • 1...Kxd4
        • 2.Sd5#
      • 1...Qxb4
        • 2.Sxc2#
      • 1...Be4
        • 2.Qg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(b);N_GUARD,P_PINS(J),XP(F)::S(A),XB(d)
    • R(c);SBLOCK,XP(H)::R1(C)
  • Tries
    • Try
      • Q(L);
      • Threat
        • S(J)
      • Vars
        • K(e);S_FLIGHT,XP(H)::B(K)+S(J)
        • Q(b);N_GUARD,P_PINS(J),XP(F)::S(A),XB(d)
      • Refutation
        • P(f);XQ(L)
    • Try
      • Q(L);CHECK
      • Refutation
        • P(g);XQ(L)
  • Actual
    • Q(L);
    • Threat
      • S(J)
    • Vars
      • K(e);S_FLIGHT,XP(H)::B(K)+S(J)
      • Q(b);N_GUARD,P_PINS(J),XP(F)::S(A),XB(d)
      • B(d);SBLOCK::QAB(L)
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