MESON Chess Problem Database

Problem Display
PID: 134841 (2n1QB2/b7/6p1/3BR2q/2Nk1n2/1R1pp3/4p3/1K2N3 w - - 0 1)

Bruch, Wieland

Die Schwalbe, 2009

2n1QB2/b7/6p1/3BR2q/2Nk1n2/1R1pp3/4p3/1K2N3

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Sxf3#
    • 1...Qh2
      • 2.Sf3#
    • 1...Qh4
      • 2.Sf3#
    • 1...Qxe5
      • 2.Qxe5#
    • 1...Qf5
      • 2.Sf3#
    • 1...Qg5
      • 2.Sf3#
    • 1...Qh6
      • 2.Sf3#
    • 1...Qh7
      • 2.Sf3#
    • 1...Qh8
      • 2.Sf3#
    • 1...Sg2
      • 2.Rxd3#
    • 1...Sh3
      • 2.Rxd3#
    • 1...Sxd5
      • 2.Re4#
    • 1...Se6
      • 2.Rxd3#
    • 1...d2
      • 2.Sc2#
  • Tries
    • 1.Qd7?
      • threat
        • 2.Re4#
      • 1...Qxe5
        • 2.Sf3#
      • 1...Sxd5
        • 2.Qxd5#
      • 1...Sd6
        • 2.Qxa7#
      • 1...Se7
        • 2.Qxa7#
      • 1...Qf3
        • 2.Sxf3#
      • 1...Qf5
        • 2.Sf3#
      • 1...Qh1!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qa1#
      • 1...Qxe5
        • 2.Sb6#
      • 1...Sxd5
        • 2.Rxd3#
      • 1...Sd6
        • 2.Qxa7#
      • 1...Se7
        • 2.Qxa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 12
  • Sets
    • Q(f);N_GUARD::S(B),XQ(f)
    • Q(f);N_GUARD::S(B)
    • Q(f);OGATE,XR(F)::QAB1(G),XQ(f)
    • S(e);N_GUARD::R1(C),XP(b)
    • S(e);SBLOCK,XB(E)::R1(F)
    • P(b);N_GUARD::S(B)
  • Tries
    • Try
      • Q(G);
      • Threat
        • R1(F)
      • Vars
        • Q(f);N_GUARD,XR(F)::S(B)
        • S(e);OGATE,P_SPINS(e),XB(E)::QAR1(G),XS(e)
        • S(i);N_GUARD::QAB(G),XB(h)
        • Q(f);N_GUARD::S(B),XQ(f)
        • Q(f);N_GUARD::S(B)
      • Refutation
        • Q(f);P_PINS(B)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)
    • Vars
      • Q(f);SBLOCK,XR(F)::QAR(G)+S(D)
      • S(e);N_GUARD,XB(E)::R1(C),XP(b)
      • S(i);N_GUARD::QAB(G),XB(h)
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