MESON Chess Problem Database

Problem Display
PID: 122367 (1r2R1b1/b3n3/B1N5/1n3p2/K1PQq3/1p3p2/2PPkp2/1NR3B1 w - - 0 1)

Kettner, Karl Werner

Welt im Bild, 1934

(First published on Sun Nov 4 1934)

1r2R1b1/b3n3/B1N5/1n3p2/K1PQq3/1p3p2/2PPkp2/1NR3B1

#2

11 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Qxd3#
    • 1...Qxc6
      • 2.Qd3#
    • 1...Qf4
      • 2.Qd3#
    • 1...Qg4
      • 2.Qd3#
    • 1...Qh4
      • 2.Qd3#
    • 1...Qe5
      • 2.Qd3#
    • 1...Qe6
      • 2.Qd3#
    • 1...Rb6
      • 2.Qxf2#
    • 1...Sa3
      • 2.Sc3#
    • 1...Sc3+
      • 2.Sxc3#
    • 1...Sd6
      • 2.Sc3#
    • 1...Sc7
      • 2.Sc3#
    • 1...Sd5
      • 2.Qd3#
    • 1...Sxc6
      • 2.Qd3#
    • 1...Sg6
      • 2.Qd3#
    • 1...Sc8
      • 2.Qd3#
  • Tries
    • 1.Qxe4+?
      • 1...Be3
        • 2.Qd3#
        • 2.Qxe3#
      • 1...fxe4!
  • Keys
    • 1.c5!
      • threat
        • 2.Sc3#
      • 1...Qxd4+
        • 2.Sxd4#
      • 1...Qxc2
        • 2.Qe3#
      • 1...Qd3
        • 2.Qxf2#
        • 2.Qxd3#
      • 1...Qe3
        • 2.Qxe3#
      • 1...Bc4
        • 2.Qxf2#
      • 1...Sd5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 15
  • Sets
    • Q(e);N_GUARD,P_SPINS(i)::QAB1(H),XQ(e)
    • Q(e);N_GUARD,P_SPINS(i),XS(J)::QAB1(H)
    • Q(e);N_GUARD,P_SPINS(i)::QAB1(H)
    • Q(e);N_GUARD::QAB1(H)
    • R(j);S_CUTB(h)::QAR1(H),XP(b)
    • S(f);N_GUARD::S(A)
    • S(f);CHECK,N_GUARD::S(A),XS(f)
    • S(i);P_SPINQ(e)::QAB1(H)
    • S(i);P_SPINQ(e),XS(J)::QAB1(H)
  • Tries
    • Try
      • Q(H);CHECK,XQ(e)
      • Refutation
        • P(g);XQ(H)
  • Actual
    • P(G);P_PINS(f),P_SPINQ(H)
    • Threat
      • S(A)
    • Vars
      • Q(e);CHECK,XQ(H)::S(J),XQ(e)
      • Q(e);N_PINQ(H),XP(D)::QAR1(H)
      • Q(e);N_PINQ(H)::QAR1(H),XQ(e)
      • B(k);N_PINQ(H),N_SPINS(f)::QAR1(H),XP(b)
      • S(i);P_SPINQ(e),S_CUTB(k)::QAB(H)
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