MESON Chess Problem Database

Problem Display
PID: 567 (3K4/2ppp3/n2q2n1/3Q4/1p3p2/3B4/2PkP3/R2N2R1 w - - 0 1)

King-Farlow, Charles P

The Observer, 1965

3K4/2ppp3/n2q2n1/3Q4/1p3p2/3B4/2PkP3/R2N2R1

#2

8 + 9

SOLUTION

  • SOUND
  • Tries
    • 1.Bc4+?
      • 1...Kxc2
        • 2.Bb3#
      • 1...Qxd5!
    • 1.Be4+?
      • 1...Kxe2
        • 2.Bf3#
      • 1...Qxd5!
    • 1.Bb5+?
      • 1...Kxc2
        • 2.Qa2#
      • 1...Qxd5!
    • 1.Bf5+?
      • 1...Kxe2
        • 2.Qg2#
      • 1...Qxd5!
    • 1.Bxa6+?
      • 1...Kxc2
        • 2.Qa2#
      • 1...Qxd5!
    • 1.Bxg6+?
      • 1...Kxe2
        • 2.Qg2#
      • 1...Qxd5!
    • 1.Qg2?
      • threat
        • 2.e3#
        • 2.e4#
      • 1...Qxd3
        • 2.exd3#
      • 1...Qc5
        • 2.e3#
      • 1...Qd4
        • 2.e3#
      • 1...Qd5
        • 2.e4#
      • 1...Qb6
        • 2.e3#
      • 1...Qc6
        • 2.e4#
      • 1...f3
        • 2.exf3#
      • 1...Sh4!
  • Keys
    • 1.Qa2!
      • threat
        • 2.c3#
        • 2.c4#
      • 1...Qxd3
        • 2.cxd3#
      • 1...Qe5
        • 2.c3#
      • 1...Qd4
        • 2.c3#
      • 1...Qd5
        • 2.c4#
      • 1...Qe6
        • 2.c4#
      • 1...Qf6
        • 2.c3#
      • 1...b3
        • 2.cxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(D)::B(F)
      • Refutation
        • Q(e);XQ(G)
    • Try
      • B(F);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(E)::B(F)
      • Refutation
        • Q(e);XQ(G)
    • Try
      • B(F);CHECK
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(D)::QAR2(G)
      • Refutation
        • Q(e);XQ(G)
    • Try
      • B(F);CHECK
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(E)::QAR2(G)
      • Refutation
        • Q(e);XQ(G)
    • Try
      • B(F);CHECK,XS(d)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(D)::QAR2(G)
      • Refutation
        • Q(e);XQ(G)
    • Try
      • B(F);CHECK,XS(f)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(E)::QAR2(G)
      • Refutation
        • Q(e);XQ(G)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);OGATE,XB(F)::QAR(G)+P(E),XQ(e)
        • Q(e);::QAR(G)+P(E)
        • P(c);OGATE::QAR(G)+P(E),XP(c)
      • Refutation
        • S(f);
  • Actual
    • Q(G);
    • Threat
      • DUALS(2)
    • Vars
      • Q(e);OGATE,XB(F)::QAR(G)+P(D),XQ(e)
      • Q(e);::QAR(G)+P(D)
      • P(b);OGATE::QAR(G)+P(D),XP(b)
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