MESON Chess Problem Database

Problem Display
PID: 260084 (8/2Q1nN1R/1nRP1k2/5p1K/3q1pp1/8/B7/4r2b w - - 0 1)

Kupper, Josef

Schweizerische Schachzeitung, 2005

8/2Q1nN1R/1nRP1k2/5p1K/3q1pp1/8/B7/4r2b

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qxe7#
    • 1...Rb1
      • 2.Qxe7#
    • 1...Rc1
      • 2.Qxe7#
    • 1...Rd1
      • 2.Qxe7#
    • 1...Rf1
      • 2.Qxe7#
    • 1...Rg1
      • 2.Qxe7#
    • 1...Be4
      • 2.Qxe7#
  • Tries
    • 1.Rh6+?
      • 1...Sg6
        • 2.Rxg6#
      • 1...Kg7!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qxe7#
      • 1...Kxe5
        • 2.Qxe7#
      • 1...Qxe5
        • 2.Rf7#
      • 1...Rxe5
        • 2.Rf7#
      • 1...Sxc6
        • 2.Qg7#
      • 1...Sbd5
        • 2.dxe7#
      • 1...Sed5
        • 2.d7#
      • 1...Sd7
        • 2.Sxd7#
      • 1...Sbc8
        • 2.Sd7#
      • 1...Sg6
        • 2.Qg7#
      • 1...Sec8
        • 2.Qg7#
      • 1...Sg8
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 7
  • Sets
    • R(a);N_GUARD::QAB1(E),XS(i)
    • B(b);S_CUTR(a)::QAB1(E),XS(i)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::R1(G),XS(i)
      • Refutation
        • K(h);S_FLIGHT
  • Actual
    • S(F);
    • Threat
      • QAB1(E),XS(i)
    • Vars
      • K(h);S_FLIGHT,XS(F)::QAR2(E),XS(i)
      • Q(c);SBLOCK,XS(F)::R1(G)
      • R(a);SBLOCK,XS(F)::R1(G)
      • S(i);OGATE,XR(C)::QAB1(E)
      • S(g);S_CUTB(b),S_CUTQ(c)::R(C)+P(D),XS(i)
      • S(i);N_GUARD,S_CUTB(b),S_CUTQ(c)::R(C)+P(D)
      • S(g);N_GUARD::S(F),XS(g)
      • S(g);N_GUARD::S(F)
      • S(i);OGATE::QAB1(E)
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