MESON Chess Problem Database

Problem Display
PID: 274098 (8/8/3p1P2/3Q4/4nBN1/4Pk2/4R1Rp/K4bbr w - - 0 1)

Johner, Hans

Zurcher Woche, 1963

(First published on Tue Nov 12 1963)

8/8/3p1P2/3Q4/4nBN1/4Pk2/4R1Rp/K4bbr

#2

8 + 7

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe2
      • 2.Rg3#
    • 1...Bf2
      • 2.Rexf2#
  • Tries
    • 1.Sxh2+?
      • 1...Bxh2
        • 2.Ref2#
        • 2.Qh5#
      • 1...Rxh2!
    • 1.Ra2?
      • threat
        • 2.Rg3#
      • 1...Bxg2
        • 2.Qd1#
      • 1...Bf2
        • 2.Raxf2#
      • 1...Bxe3!
    • 1.Rb2?
      • threat
        • 2.Rg3#
      • 1...Bxg2
        • 2.Qd1#
      • 1...Bf2
        • 2.Rbxf2#
      • 1...Bxe3!
    • 1.Rc2?
      • threat
        • 2.Rg3#
      • 1...Bxg2
        • 2.Qd1#
      • 1...Bf2
        • 2.Rcxf2#
      • 1...Bxe3!
  • Keys
    • 1.Sf2!
      • 1...Kxe2
        • 2.Qd1#
      • 1...Kxg2
        • 2.Qxe4#
      • 1...Bxe2
        • 2.Qxe4#
      • 1...Bxg2
        • 2.Qh5#
      • 1...Bxf2
        • 2.Rexf2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK,XR(B)::R1(C)
    • B(b);N_GUARD::R1(B),XB(b)
  • Tries
    • Try
      • S(F);CHECK,XP(d)
      • Refutation
        • R(c);XS(F)
    • Try
      • R(B);
      • Threat
        • R1(C)
      • Vars
        • B(a);N_GUARD,XR(C)::QAB(G)
        • B(b);N_GUARD::R1(B),XB(b)
      • Refutation
        • B(b);XP(D)
    • Try
      • R(B);
      • Threat
        • R1(C)
      • Vars
        • B(a);N_GUARD,XR(C)::QAB(G)
        • B(b);N_GUARD::R1(B),XB(b)
      • Refutation
        • B(b);XP(D)
    • Try
      • R(B);
      • Threat
        • R1(C)
      • Vars
        • B(a);N_GUARD,XR(C)::QAB(G)
        • B(b);N_GUARD::R1(B),XB(b)
      • Refutation
        • B(b);XP(D)
  • Actual
    • S(F);
    • Vars
      • K(e);N_SPINS(f),OGATEB,S_FLIGHT,XR(B)::QAB1(G)
      • K(e);N_GUARD,S_FLIGHT,XR(C)::QAB(G),XS(f)
      • B(a);SBLOCK,XR(B)::QAB1(G),XS(f)
      • B(a);SBLOCK,XR(C)::QAB(G)
      • B(b);OGATE,XS(F)::R1(B),XB(b)
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