MESON Chess Problem Database

Problem Display
PID: 146131 (3N4/2p1n2B/Rq3k1P/7p/3R1P2/3p3r/5Qp1/6Kb w - - 0 1)

Kettner, Karl Werner

Brisbane Courier, 1931

(First published on Sat May 30 1931)

3N4/2p1n2B/Rq3k1P/7p/3R1P2/3p3r/5Qp1/6Kb

#2

8 + 9

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Rxe6#
    • 1...Re3
      • 2.Qh4#
    • 1...Rf3
      • 2.Qh4#
    • 1...Rh4
      • 2.Qxh4#
    • 1...c6
      • 2.Rd6#
  • Tries
    • 1.Rd6+?
      • 1...Qxd6
        • 2.Qd4#
        • 2.Qb2#
      • 1...cxd6!
    • 1.Rxb6+?
      • 1...cxb6
        • 2.Rd6#
      • 1...c6
        • 2.Rd6#
      • 1...Sc6!
    • 1.Qe1?
      • threat
        • 2.Qe5#
      • 1...Re3
        • 2.Qh4#
      • 1...Sc6
        • 2.Qe6#
      • 1...Sg6!
    • 1.Qg3?
      • threat
        • 2.Qg5#
        • 2.Qg7#
      • 1...Sf5
        • 2.Qg5#
      • 1...Sg6
        • 2.Qg5#
      • 1...Rxg3!
    • 1.Qa2?
      • threat
        • 2.Qf7#
      • 1...Qe6
        • 2.Rxe6#
        • 2.Qxe6#
      • 1...Sd5!
  • Keys
    • 1.Rd7!
      • threat
        • 2.Qd4#
      • 1...Sg6
        • 2.Rf7#
      • 1...Re3
        • 2.Qh4#
      • 1...Sf5
        • 2.Rf7#
      • 1...Sc6
        • 2.Rf7#
      • 1...c5
        • 2.Qb2#
      • 1...c6
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(f);OGATE::R1(E),XQ(f)
    • R(d);N_GUARD::QAB(B)
    • R(d);N_GUARD::QAB(B),XR(d)
    • P(h);N_GUARD,N_SPINQ(f),S_CUTQ(f)::R(C)
  • Tries
    • Try
      • R(C);CHECK,N_PINQ(f),P_SPINQ(B)
      • Refutation
        • P(h);XR(C)
    • Try
      • R(E);CHECK,XQ(f)
      • Vars
        • P(h);N_GUARD,XR(E)::R(C)
        • P(h);N_GUARD,P_SPINP(h)::R(C)
      • Refutation
        • S(i);P_SPINS(i)
    • Try
      • Q(B);P_SPINR(C)
      • Threat
        • QAB1(B)
      • Vars
        • R(d);N_GUARD,N_PINR(C)::QAB(B)
        • S(i);N_SPINQ(f),S_CUTQ(f)::QAR1(B)
      • Refutation
        • S(i);
    • Try
      • Q(B);P_SPINR(C)
      • Threat
        • DUALS(2)
      • Vars
        • S(i);::QAB1(B)
      • Refutation
        • R(d);XQ(B)
    • Try
      • Q(B);P_SPINR(C)
      • Threat
        • QAR1(B)
      • Refutation
        • S(i);
  • Actual
    • R(C);P_SPINQ(B)
    • Threat
      • QAB(B)
    • Vars
      • S(i);OGATE::R1(C)
      • R(d);N_PINQ(B)::QAB(B)
      • S(i);N_SPINQ(f),OGATE::R1(C)
      • P(h);N_PINQ(B)::QAB(B)
      • P(h);N_GUARD,N_SPINQ(f),S_CUTQ(f)::R(C)
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