MESON Chess Problem Database

Problem Display
PID: 19049 (2R3bb/rpN5/p7/BP6/2k2N1R/8/K2p4/6Q1 w - - 0 1)

Blake, Percy Francis

3rd Prize, Sydney Morning Herald, 1910-1911

2R3bb/rpN5/p7/BP6/2k2N1R/8/K2p4/6Q1

#2

8 + 7

56 The Problemist 2009

SOLUTION

  • SOUND
  • Sets
    • 1...axb5
      • 2.Scd5#
      • 2.Sa6#
      • 2.Sce6#
      • 2.Sa8#
      • 2.Se8#
  • Tries
    • 1.Se2+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kd3+!
    • 1.Sg2+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kd3+!
    • 1.Sd3+?
      • 1...Bd4
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Kxd3+!
    • 1.Sh3+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kd3+!
    • 1.Sfd5+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kd3!
    • 1.Sh5+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kd3+!
    • 1.Sfe6+?
      • 1...Bd4
        • 2.Rxd4#
        • 2.Qxd4#
        • 2.Qf1#
      • 1...Kd3!
    • 1.Sg6+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kd3+!
    • 1.Qxg8+?
      • 1...Kc5
        • 2.Qd5#
      • 1...Kd4!
  • Keys
    • 1.Bb6!
      • threat
        • 2.Qc5#
      • 1...Kc3+
        • 2.Scd5#
      • 1...Kb4+
        • 2.Sfd5#
      • 1...axb5+
        • 2.Sa6#
      • 1...Bd4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAR1(A),XB(g)
      • Refutation
        • K(b);CHECK,S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAR1(A),XB(g)
      • Refutation
        • K(b);CHECK,S_FLIGHT
    • Try
      • S(C);CHECK
      • Refutation
        • K(b);CHECK,S_FLIGHT,XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAR1(A),XB(g)
      • Refutation
        • K(b);CHECK,S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAR1(A),XB(g)
      • Refutation
        • K(b);P_PINS(C),S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAR1(A),XB(g)
      • Refutation
        • K(b);CHECK,S_FLIGHT
    • Try
      • S(C);CHECK
      • Refutation
        • K(b);P_PINS(C),S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAR1(A),XB(g)
      • Refutation
        • K(b);CHECK,S_FLIGHT
    • Try
      • Q(A);CHECK,XB(f)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • B(E);
    • Threat
      • QAR1(A)
    • Vars
      • K(b);CHECK,P-FLIGHT::R(H)+S(G),DCHECK
      • K(b);CHECK,P-FLIGHT::R(D)+S(C),DCHECK
      • P(c);CHECK,SBLOCK,XP(F)::R(H)+S(G)
      • B(g);N_GUARD::QAR1(A),XB(g)
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