MESON Chess Problem Database

Problem Display
PID: 161630 (8/K3pQ2/1B1P4/1p4p1/BRN1k1Pn/2q5/n1P2P2/3N1R2 w - - 0 1)

Kettner, Karl Werner

Welt im Bild (Leipziger NN), 1936

(First published on Sun Aug 23 1936)

8/K3pQ2/1B1P4/1p4p1/BRN1k1Pn/2q5/n1P2P2/3N1R2

#2

12 + 7

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Re1#
    • 1...Qe1
      • 2.Rxe1#
    • 1...Qb2
      • 2.Re1#
    • 1...Qe5
      • 2.Sd2#
      • 2.Re1#
    • 1...Qg7
      • 2.Re1#
    • 1...Qh8
      • 2.Re1#
    • 1...Qxc2
      • 2.Bxc2#
    • 1...Qxc4
      • 2.Re1#
    • 1...Sc1
      • 2.Sxc3#
    • 1...Sxb4
      • 2.Sxc3#
    • 1...Sg2
      • 2.Qf5#
    • 1...Sf3
      • 2.Qf5#
    • 1...Sf5
      • 2.Qxf5#
    • 1...Sg6
      • 2.Qf5#
    • 1...e5
      • 2.Sd2#
  • Tries
    • 1.Re1+?
      • 1...Qe3
        • 2.Rxe3#
      • 1...Qxe1!
    • 1.f3+?
      • 1...Sxf3
        • 2.Sf2#
        • 2.Qf5#
      • 1...Qxf3!
  • Keys
    • 1.f4!
      • threat
        • 2.Sd2#
      • 1...Qxb4
        • 2.Qe6#
      • 1...Qxc2
        • 2.Bxc2#
      • 1...Qxc4
        • 2.Qe6#
      • 1...Sxb4
        • 2.Sxc3#
      • 1...bxc4
        • 2.Bc6#
      • 1...gxf4
        • 2.Rxf4#
      • 1...e6
        • 2.Qb7#
      • 1...Qd2
        • 2.Sxd2#
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 11
  • Sets
    • Q(b);N_GUARD::R(B)
    • Q(b);N_GUARD::R(B),XQ(b)
    • Q(b);OGATE,XP(C)::B(E),XQ(b)
    • Q(b);N_GUARD,P_SPINQ(b),XS(G)::R(B)
    • S(a);N_GUARD::S(A),XQ(b)
    • S(a);N_GUARD,XR(F)::S(A),XQ(b)
    • S(d);N_GUARD::QAB1(L)
    • S(d);N_GUARD::QAB1(L),XS(d)
    • P(g);SBLOCK::R(F)+S(G),DCHECK
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • Q(b);N_GUARD,P_PINB(I),P_SPINQ(b)::R1(B),XQ(b)
      • Refutation
        • Q(b);XR(B)
    • Try
      • P(D);CHECK
      • Refutation
        • Q(b);XP(D)
  • Actual
    • P(D);
    • Threat
      • R(F)+S(G),DCHECK
    • Vars
      • Q(b);N_GUARD,XR(F)::QAR2(L)
      • Q(b);OGATE,XP(C)::B(E),XQ(b)
      • Q(b);N_GUARD,P_SPINQ(b),XS(G)::QAR2(L)
      • S(a);N_GUARD,XR(F)::S(A),XQ(b)
      • P(e);OGATE,P_SPINP(e),XS(G)::B(E)
      • P(f);OGATE,XP(D)::R1(B),XP(f)
      • P(g);OGATE::QAB(L)
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