MESON Chess Problem Database

Problem Display
PID: 221356 (1Qr5/B1R1N3/rq1p2p1/n2p2N1/3k4/P4R2/6K1/5B2 w - - 0 1)

Henning, Hans

Funkschach, 1926

1Qr5/B1R1N3/rq1p2p1/n2p2N1/3k4/P4R2/6K1/5B2

#2

9 + 8

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Qb2#
    • 1...Qxa7
      • 2.Qb2#
    • 1...Rh8
      • 2.Qxh8#
  • Tries
    • 1.Sc6+?
      • 1...Kc5
        • 2.Se6#
      • 1...Sxc6!
    • 1.Bxb6+?
      • 1...Ke5
        • 2.Sxg6#
      • 1...Rxb6!
    • 1.Rf4+?
      • 1...Ke5
        • 2.Sxg6#
      • 1...Ke3!
    • 1.Qxb6+?
      • 1...Ke5
        • 2.Sxg6#
        • 2.Qe3#
        • 2.Qd4#
      • 1...Rxb6!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Rxd5#
      • 1...Qb2+
        • 2.Qxb2#
      • 1...Kxc5
        • 2.Se6#
      • 1...Ke5
        • 2.Rxd5#
      • 1...Qxc5
        • 2.Qb2#
      • 1...Rxc5
        • 2.Qh8#
      • 1...dxc5
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(e);OGATE::QAB(I)
    • Q(e);N_SPINQ(e),OGATE,XB(F)::QAB(I)
    • R(h);OGATE::QAB(I),XR(h)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(a);S_FLIGHT::S(E)
      • Refutation
        • S(b);XS(H)
    • Try
      • B(F);CHECK,XQ(e)
      • Vars
        • K(a);S_FLIGHT::S(H),XP(g)
      • Refutation
        • R(d);XB(F)
    • Try
      • R(D);CHECK
      • Vars
        • K(a);N_SPINQ(e),S_FLIGHT::S(H),XP(g)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(I);CHECK,XQ(e)
      • Refutation
        • R(d);P_SPINR(d),XQ(I)
  • Actual
    • R(G);N_PINQ(e)
    • Threat
      • R1(G),XP(c)
    • Vars
      • Q(e);CHECK,OGATE::QAB(I),XQ(e)
      • K(a);P_SPINQ(e),S_FLIGHT,XR(G)::S(E)
      • K(a);P_SPINP(c),S_FLIGHT::R1(G),XP(c)
      • Q(e);OGATE,P_SPINQ(e),XR(G)::QAB(I)
      • R(h);OGATE,SBLOCK,XR(G)::QAB(I)
      • P(f);OGATE,SBLOCK,XR(G)::QAR2(I)
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