MESON Chess Problem Database

Problem Display
PID: 137406 (2KB4/8/7p/4N2k/5pR1/6bb/4Q3/8 w - - 0 1)

Fegan, Bertram George

Hawes, Frederick Thomas

The Australasian Chess Review, 1929

2KB4/8/7p/4N2k/5pR1/6bb/4Q3/8

#2

5 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Rh4#
    • 1...Bg2
      • 2.Rh4#
    • 1...Bxg4+
      • 2.Qxg4#
  • Tries
    • 1.Kc7?
      • threat
        • 2.Rh4#
      • 1...Bxg4
        • 2.Qxg4#
      • 1...Bh4
        • 2.Rxh4#
        • 2.Rg5#
      • 1...f3!
    • 1.Kb8?
      • threat
        • 2.Rh4#
      • 1...Bxg4
        • 2.Qxg4#
      • 1...Bh4
        • 2.Rxh4#
        • 2.Rg5#
      • 1...f3!
    • 1.Qd3?
      • threat
        • 2.Qf5#
        • 2.Qg6#
      • 1...Bh4
        • 2.Qg6#
      • 1...Bxg4+!
    • 1.Qc2?
      • threat
        • 2.Qf5#
        • 2.Qg6#
      • 1...Bh4
        • 2.Qg6#
      • 1...Bxg4+!
    • 1.Qe4?
      • threat
        • 2.Qf5#
        • 2.Qg6#
      • 1...Bh4
        • 2.Qg6#
      • 1...Bxg4+!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Sf6#
      • 1...Bxg4
        • 2.Qe8#
      • 1...Bh4
        • 2.Rg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • B(b);N_PINR(B)::QAB(A)+R(B),DCHECK
    • B(b);CHECK,OGATE,P_SPINB(b),XR(B)::QAB1(A),XB(b)
  • Tries
    • Try
      • K(D);N_SPINR(B),P-FLIGHT
      • Threat
        • QAB(A)+R(B),DCHECK
      • Vars
        • B(b);OGATE,P_SPINB(b),XR(B)::QAB1(A),XB(b)
      • Refutation
        • P(c);P_PINS(C)
    • Try
      • K(D);N_SPINR(B),P-FLIGHT
      • Threat
        • QAB(A)+R(B),DCHECK
      • Vars
        • B(b);OGATE,P_SPINB(b),XR(B)::QAB1(A),XB(b)
      • Refutation
        • P(c);P_PINS(C)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB1(A)
      • Refutation
        • B(b);CHECK,XR(B)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB1(A)
      • Refutation
        • B(b);CHECK,XR(B)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB1(A)
      • Refutation
        • B(b);CHECK,XR(B)
  • Actual
    • S(C);N_SPINR(B)
    • Threat
      • S(C)
    • Vars
      • B(b);P_PINS(C),P_SPINB(b),SBLOCK,XR(B)::QAB(A)
      • B(a);SBLOCK::QAB(A)+R(B),DCHECK
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