MESON Chess Problem Database

Problem Display
PID: 916 (4Nr2/1n6/2p3N1/5P2/4k3/6R1/1K4p1/1b1Q4 w - - 0 1)

Shire, David J

The Problemist Supplement, 1992

4Nr2/1n6/2p3N1/5P2/4k3/6R1/1K4p1/1b1Q4

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf5
      • 2.Qg4#
    • 1...Ba2
      • 2.Qd3#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Sa5
      • 2.Sd6#
    • 1...Sc5
      • 2.Sd6#
    • 1...Sd6
      • 2.Sxd6#
    • 1...Sd8
      • 2.Sd6#
  • Tries
    • 1.Kc3?
      • threat
        • 2.Qf3#
      • 1...Kxf5
        • 2.Qg4#
      • 1...Rxf5
        • 2.Qd4#
      • 1...g1S!
    • 1.Re3+?
      • 1...Kxf5
        • 2.Qh5#
      • 1...Kxe3!
    • 1.Rg4+?
      • 1...Kxf5
        • 2.Qd7#
      • 1...Ke3!
    • 1.Qa4+?
      • 1...Kxf5
        • 2.Qg4#
      • 1...Kd5!
    • 1.Qd4+?
      • 1...Kxf5
        • 2.Sg7#
        • 2.Qe5#
        • 2.Qg4#
      • 1...Kxd4!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Qg4#
      • 1...Kxf5
        • 2.Qf3#
      • 1...Rxf5
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • K(c);S_FLIGHT,XP(D)::QAB1(A)
    • B(a);N_GUARD::QAB1(A)
    • B(a);N_GUARD::QAB1(A),XB(a)
    • S(e);N_GUARD::S(F)
    • S(e);N_GUARD::S(F),XS(e)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • QAB1(A)
      • Vars
        • K(c);S_FLIGHT,XP(D)::QAB1(A)
        • R(f);SBLOCK,XP(D)::QAR1(A)
      • Refutation
        • P(b);
    • Try
      • R(C);CHECK
      • Vars
        • K(c);S_FLIGHT,XP(D)::QAR2(A)
      • Refutation
        • K(c);P-FLIGHT,XR(C)
    • Try
      • R(C);CHECK
      • Vars
        • K(c);S_FLIGHT,XP(D)::QAB(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT,XP(D)::QAB1(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(c);P-FLIGHT,XQ(A)
  • Actual
    • S(F);
    • Threat
      • QAR2(A)
    • Vars
      • K(c);S_FLIGHT,XP(D)::QAR2(A)
      • R(f);SBLOCK,XP(D)::QAR(A)
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