MESON Chess Problem Database

Problem Display
PID: 147697 (3b1qQ1/4Rp2/Kp6/1Nk3BR/1p6/1P6/2p1r3/5B2 w - - 0 1)

Kettner, Karl Werner

Nordhauser Zeitung, 1933

(First published on Sat Apr 15 1933)

3b1qQ1/4Rp2/Kp6/1Nk3BR/1p6/1P6/2p1r3/5B2

#2

8 + 8

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Qc4#
    • 1...f6
      • 2.Qc4#
  • Tries
    • 1.Bf4+?
      • 1...Kc6
        • 2.Sd4#
        • 2.Sa7#
      • 1...f5
        • 2.Qc4#
      • 1...Re5!
  • Keys
    • 1.Kb7!
      • threat
        • 2.Be3#
      • 1...Qxe7+
        • 2.Bxe7#
      • 1...Rxe7+
        • 2.Bxe7#
      • 1...Kxb5
        • 2.Bf6#
      • 1...Kd5
        • 2.Be3#
      • 1...Re3
        • 2.Bxe3#
      • 1...Re5
        • 2.Rxe5#
      • 1...f5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • P(f);OGATE::QAR1(H)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • P(f);OGATE,P_SPINP(f)::QAR1(H)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • K(F);S_FLIGHT
    • Threat
      • R(E)+B(D),DCHECK
    • Vars
      • Q(h);CHECK,OGATE,XR(G)::R(E)+B(D),DCHECK,XQ(h)
      • R(b);CHECK,OGATE,XR(G)::R(E)+B(D),DCHECK,XR(b)
      • K(d);P-FLIGHT,P_SPINR(b),XS(C)::R(E)+B(D)
      • K(d);P-FLIGHT,P_SPINP(f)::R(E)+B(D)
      • R(b);::R(E)+B(D),DCHECK,XR(b)
      • R(b);N_GUARD::R(G),XR(b)
      • P(f);OGATE::QAR1(H)
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