MESON Chess Problem Database

Problem Display
PID: 143037 (2N3qb/1r6/br1pp1p1/3RnkP1/7P/1Q1pRP2/7B/K7 w - - 0 1)

Busack, Otto

1st Prize, Die Schwalbe TT, 1941

2N3qb/1r6/br1pp1p1/3RnkP1/7P/1Q1pRP2/7B/K7

#2

9 + 11

274 diagrammes 1973
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb3
      • 2.Sxd6#
    • 1...Rb4
      • 2.Sxd6#
    • 1...Rb5
      • 2.Sxd6#
      • 2.Qxd3#
    • 1...Re7
      • 2.Sxe7#
    • 1...Rb8
      • 2.Se7#
  • Tries
    • 1.Re4?
      • threat
        • 2.Rf4#
      • 1...Rb4
        • 2.Sxd6#
      • 1...exd5!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Rf4#
      • 1...Sxf3
        • 2.Rxf3#
      • 1...Rb4
        • 2.Sxd6#
      • 1...Sc4
        • 2.Qxd3#
      • 1...Sg4
        • 2.fxg4#
      • 1...Sc6
        • 2.Sxd6#
      • 1...Sd7
        • 2.Se7#
      • 1...Sf7
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • R(e);N_GUARD,XQ(C)::S(I),XP(f)
    • R(e);N_GUARD::S(I),XP(f)
    • R(i);N_GUARD::S(I),XR(i)
    • R(i);N_GUARD::S(I)
  • Tries
    • Try
      • R(D);
      • Threat
        • R1(D)
      • Vars
        • R(e);N_GUARD::S(I),XP(f)
      • Refutation
        • P(g);N_SPINS(b),XR(G)
  • Actual
    • R(G);N_PINS(b)
    • Threat
      • R1(G)
    • Vars
      • S(b);OGATE,P_PINR(G),XP(E)::R(D),XS(b)
      • R(e);N_GUARD::S(I),XP(f)
      • S(b);N_GUARD,P_PINR(G),S_CUTB(d)::QAB(C),XP(a)
      • S(b);OGATE,P_PINR(G)::P(E),XS(b)
      • S(b);P_PINR(G),S_CUTR(e)::S(I),XP(f)
      • S(b);P_PINR(G),S_CUTR(i)::S(I)
      • S(b);P_PINR(G),S_CUTQ(j)::QAB1(C),XP(g)
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