MESON Chess Problem Database

Problem Display
PID: 282726 (1BNQ4/2pp3p/K1k3bR/1p1rb3/1p1p1p2/1P1N1P2/8/8 w - - 0 1)

Hoffmann, Martin Wolfgang

Zurcher Woche, 1968

(First published on Fri Aug 9 1968)

1BNQ4/2pp3p/K1k3bR/1p1rb3/1p1p1p2/1P1N1P2/8/8

#2

8 + 11

15601 Albrecht-Leiss-Degener Collection 2025

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Sxb4#
    • 1...Rd6
      • 2.Se7#
    • 1...Bd6
      • 2.Sa7#
    • 1...Bf6
      • 2.Qxc7#
    • 1...Bg7
      • 2.Qxc7#
    • 1...Bh8
      • 2.Qxc7#
    • 1...d6
      • 2.Sa7#
      • 2.Se7#
      • 2.Qxc7#
  • Tries
    • 1.Ka7?
      • 1...Rc5
        • 2.Sxb4#
      • 1...Rd6
        • 2.Se7#
      • 1...Bf6
        • 2.Qxc7#
      • 1...Bg7
        • 2.Qxc7#
      • 1...Bh8
        • 2.Qxc7#
      • 1...d6
        • 2.Se7#
        • 2.Qxc7#
      • 1...Bd6!
    • 1.Sxe5+?
      • 1...Kc5
        • 2.Ba7#
        • 2.Qxc7#
      • 1...Rxe5!
    • 1.Bxc7?
      • threat
        • 2.Sa7#
        • 2.Se7#
      • 1...Rc5
        • 2.Sxb4#
        • 2.Se7#
      • 1...Rd6
        • 2.Se7#
      • 1...Bd6
        • 2.Sa7#
      • 1...Bf6
        • 2.Sa7#
      • 1...Bxc7!
    • 1.Rxg6+?
      • 1...Rd6
        • 2.Se7#
      • 1...Bd6
        • 2.Sa7#
        • 2.Se7#
        • 2.Qxc7#
      • 1...Bf6
        • 2.Qxc7#
      • 1...d6
        • 2.Sa7#
        • 2.Se7#
        • 2.Qxc7#
        • 2.Qe8#
      • 1...hxg6!
    • 1.Qe7?
      • threat
        • 2.Sxb4#
        • 2.Sa7#
      • 1...Rc5
        • 2.Sxb4#
        • 2.Qxc5#
      • 1...Bd6
        • 2.Sa7#
      • 1...d6
        • 2.Sa7#
        • 2.Qxc7#
      • 1...Rd6!
    • 1.Qf8?
      • threat
        • 2.Sxb4#
        • 2.Sa7#
      • 1...Rc5
        • 2.Sxb4#
        • 2.Qxc5#
      • 1...Rd6
        • 2.Se7#
      • 1...Bd6
        • 2.Sa7#
      • 1...d6!
  • Keys
    • 1.Sb6!
      • 1...Kd6
        • 2.Qxd7#
      • 1...cxb6
        • 2.Qxb6#
      • 1...Rc5
        • 2.Qxd7#
      • 1...Rd6
        • 2.Qxc7#
      • 1...Bd6
        • 2.Qxd7#
      • 1...Bf6
        • 2.Qxc7#
      • 1...Bg7
        • 2.Qxc7#
      • 1...Bh8
        • 2.Qxc7#
      • 1...d6
        • 2.Qxc7#
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(e);SBLOCK::S(B),XP(a)
    • R(e);N_SPINB(h),SBLOCK::S(G)
    • B(f);N_SPINB(h),SBLOCK::S(G)
    • B(f);N_GUARD,N_SPINB(h)::QAR1(H),XP(i)
    • B(f);N_GUARD::QAR1(H),XP(i)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • R(e);SBLOCK::S(B),XP(a)
        • R(e);N_SPINB(h),SBLOCK::S(G)
        • B(f);N_GUARD,N_SPINB(h)::QAR1(H),XP(i)
        • B(f);N_GUARD::QAR1(H),XP(i)
      • Refutation
        • B(f);N_SPINB(h)
    • Try
      • S(B);CHECK,XB(f)
      • Refutation
        • R(e);XS(B)
    • Try
      • B(F);XP(i)
      • Threat
        • DUALS(2)
      • Vars
        • R(e);N_SPINB(h)::S(G)
        • B(f);N_SPINB(h)::S(G)
      • Refutation
        • B(f);XB(F)
    • Try
      • R(E);CHECK,XB(h)
      • Vars
        • R(e);P_SPINR(e)::S(G)
        • B(f);P_SPINB(f)::QAR1(H),XP(i)
      • Refutation
        • P(k);XR(E)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • B(f);N_SPINB(h)::S(G)
      • Refutation
        • R(e);N_SPINB(h)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);N_SPINB(h),SBLOCK::S(G)
        • B(f);N_SPINB(h)::S(G)
      • Refutation
        • P(j);N_SPINB(h)
  • Actual
    • S(G);
    • Vars
      • K(g);P-FLIGHT,P_SPINP(i),S_CUTR(e)::QAR1(H),XP(j)
      • P(i);OGATE,XS(G)::QAR1(H),XP(i)
      • R(e);N_GUARD::QAB1(H),XP(j)
      • R(e);N_SPINB(h),S_CUTB(f)::QAR1(H),XP(i)
      • B(f);N_SPINB(h),S_CUTR(e)::QAB1(H),XP(j)
      • B(f);N_GUARD,N_SPINB(h)::QAR1(H),XP(i)
      • B(f);N_GUARD::QAR1(H),XP(i)
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