MESON Chess Problem Database

Problem Display
PID: 5015 (3K4/2NR4/4N2p/2P5/n1p1k1B1/4B3/1n1P4/1q2R1b1 w - - 0 1)

Blake, Percy Francis

1st Prize, Bradford Observer Budget, 1896-1897

3K4/2NR4/4N2p/2P5/n1p1k1B1/4B3/1n1P4/1q2R1b1

#2

9 + 7

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Bd4#
    • 1...Qa2
      • 2.Bxg1#
      • 2.Bf2#
    • 1...Qc2
      • 2.Bxg1#
      • 2.Bf2#
    • 1...Bxe3
      • 2.Rxe3#
  • Tries
    • 1.Bf4+?
      • 1...Be3
        • 2.Rxe3#
        • 2.Rd4#
      • 1...Qxe1!
    • 1.Bg5+?
      • 1...Be3
        • 2.Rxe3#
      • 1...Qxe1!
    • 1.Bxh6+?
      • 1...Be3
        • 2.Rxe3#
      • 1...Qxe1!
  • Keys
    • 1.Re7!
      • threat
        • 2.Sf4#
      • 1...Qd3+
        • 2.Sd4#
      • 1...Kd3
        • 2.Bf5#
      • 1...Ke5
        • 2.Bd4#
      • 1...Bxe3
        • 2.Rxe3#
      • 1...Sxc5
        • 2.Sxc5#
      • 1...Sd3
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(f);P-FLIGHT::R(A)+B(C),DCHECK
    • B(b);OGATE,P_SPINB(b),XB(C)::R1(A),XB(b)
  • Tries
    • Try
      • B(C);CHECK
      • Refutation
        • Q(a);XR(A)
    • Try
      • B(C);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::R1(A),XB(b)
      • Refutation
        • Q(a);XR(A)
    • Try
      • B(C);CHECK,XP(g)
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::R1(A),XB(b)
      • Refutation
        • Q(a);XR(A)
  • Actual
    • R(H);
    • Threat
      • R(H)+S(F)
    • Vars
      • Q(a);CHECK,SBLOCK::R(H)+S(F)
      • K(f);S_FLIGHT::B(D)
      • K(f);P-FLIGHT::R(A)+B(C),DCHECK
      • B(b);OGATE,P_SPINB(b),XB(C)::R1(A),XB(b)
      • S(d);XP(E)::R(H)+S(F),DCHECK,XS(d)
      • S(c);SBLOCK::R(H)+S(F),DCHECK
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