MESON Chess Problem Database

Problem Display
PID: 163065 (8/3p4/1Qb5/N1P1pp2/R4N2/3PkpB1/4P3/1nK5 w - - 0 1)

Kettner, Karl Werner

Welt im Bild, 1937

(First published on Sun Aug 22 1937)

8/3p4/1Qb5/N1P1pp2/R4N2/3PkpB1/4P3/1nK5

#2

9 + 7

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bxa4
      • 2.c6#
    • 1...Be4
      • 2.c6#
    • 1...Bb5
      • 2.c6#
    • 1...Bd5
      • 2.c6#
    • 1...Bb7
      • 2.c6#
    • 1...Ba8
      • 2.c6#
    • 1...d5
      • 2.cxd5 ep#
    • 1...d6
      • 2.cxd6#
  • Tries
    • 1.Re4+?
      • 1...Bxe4
        • 2.c6#
      • 1...fxe4!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Sc4#
      • 1...fxe2
        • 2.Qxe2#
      • 1...Bb5
        • 2.Sd5#
        • 2.Qxe5#
      • 1...Bd5
        • 2.Sxd5#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Sa3
        • 2.Qd2#
      • 1...Sc3
        • 2.Qd2#
      • 1...d5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • B(f);OGATE,XR(E)::QAB(I)+P(H)
    • B(f);OGATE::QAB(I)+P(H)
    • P(g);OGATE::QAB(I)+P(H),XP(g),EP
    • P(g);OGATE::QAB(I)+P(H),XP(g)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • B(f);OGATE,XR(E)::QAB(I)+P(H)
      • Refutation
        • P(e);XR(E)
  • Actual
    • Q(I);
    • Threat
      • S(G)
    • Vars
      • P(c);OGATE,XP(B)::QAR1(I),XP(c)
      • B(f);N_GUARD::S(F),XB(f)
      • S(a);N_GUARD::QAB1(I),XS(a)
      • S(a);N_GUARD::QAB1(I)
      • P(g);S_CUTB(f)::QAR2(I),XP(d)
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