MESON Chess Problem Database

Problem Display
PID: 260896 (4N3/8/2nr2p1/1nQ5/1p2kBB1/2b2R1K/3rp3/1N2R3 w - - 0 1)

Hoffmann, Martin Wolfgang

Neue Zurcher Zeitung, 1968

4N3/8/2nr2p1/1nQ5/1p2kBB1/2b2R1K/3rp3/1N2R3

#2

8 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Rxe2#
    • 1...R2d4
      • 2.Rxe2#
    • 1...R2d5
      • 2.Rxe2#
      • 2.Qe3#
    • 1...R6d4
      • 2.Sf6#
    • 1...R6d5
      • 2.Qe3#
    • 1...Bd4
      • 2.Sxd2#
    • 1...Sbd4
      • 2.Sxd6#
    • 1...Scd4
      • 2.Qe5#
  • Tries
    • 1.Sxd6+?
      • 1...Rxd6
        • 2.Rxe2#
      • 1...Sxd6!
    • 1.Bf5+?
      • 1...Kxf3
        • 2.Qe3#
      • 1...gxf5!
    • 1.Qc4+?
      • 1...R2d4
        • 2.Rxe2#
      • 1...R6d4
        • 2.Sf6#
      • 1...Bd4
        • 2.Sxd2#
      • 1...Sbd4
        • 2.Sxd6#
      • 1...Scd4!
  • Keys
    • 1.Bg3!
      • threat
        • 2.Re3#
      • 1...R2d3
        • 2.Rf4#
      • 1...R2d4
        • 2.Rxe2#
      • 1...R6d3
        • 2.Rf4#
      • 1...R6d4
        • 2.Sf6#
      • 1...Bd4
        • 2.Sxd2#
      • 1...Sbd4
        • 2.Sxd6#
      • 1...Scd4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(a);N_GUARD::R(B),XP(b)
    • R(h);N_GUARD,S_CUTB(c)::S(H)
    • R(h);SBLOCK::QAR1(G)
    • B(c);N_GUARD,S_CUTR(h)::S(A),XR(a)
    • S(f);N_GUARD,S_CUTR(a)::S(H),XR(h)
    • S(g);N_GUARD,S_CUTB(c)::QAR1(G)
  • Tries
    • Try
      • S(H);CHECK,XR(h)
      • Vars
        • R(a);XS(H)::R(B),XP(b)
      • Refutation
        • S(f);XS(H)
    • Try
      • B(F);CHECK
      • Vars
        • K(e);N_GUARD,N_SPINP(b),S_FLIGHT,XR(C)::QAR1(G)
      • Refutation
        • P(i);XB(F)
    • Try
      • Q(G);CHECK
      • Vars
        • R(a);P_SPINR(a)::R(B),XP(b)
        • R(h);P_SPINR(h)::S(H)
        • B(c);P_SPINB(c)::S(A),XR(a)
        • S(f);P_SPINS(f)::S(H),XR(h)
      • Refutation
        • S(g);P_SPINS(g)
  • Actual
    • B(E);
    • Threat
      • R1(C)
    • Vars
      • R(a);SBLOCK::R1(C)
      • R(a);N_GUARD::R(B),XP(b)
      • R(h);SBLOCK::R1(C)
      • R(h);N_GUARD,S_CUTB(c)::S(H)
      • B(c);N_GUARD,S_CUTR(h)::S(A),XR(a)
      • S(f);N_GUARD,S_CUTR(a)::S(H),XR(h)
      • S(g);N_GUARD,S_CUTB(c)::QAR1(G)
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