MESON Chess Problem Database

Problem Display
PID: 214882 (2N2r2/7Q/2b5/pR2b3/2k1r1R1/P7/2KPN1p1/5B2 w - - 0 1)

Uhler, Ekkehard

Badische Neueste Nachrichten, 1981

2N2r2/7Q/2b5/pR2b3/2k1r1R1/P7/2KPN1p1/5B2

#2

9 + 7

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Qd3#
    • 1...Ref4
      • 2.Qd3#
    • 1...Rxg4
      • 2.Qd3#
    • 1...Ba1
      • 2.Sd6#
    • 1...Bb2
      • 2.Sd6#
    • 1...Bc3
      • 2.Sd6#
    • 1...Bd4
      • 2.Sd6#
    • 1...Bd6
      • 2.Sxd6#
    • 1...Bf6
      • 2.Sd6#
    • 1...Bg7
      • 2.Sd6#
    • 1...Bh8
      • 2.Sd6#
  • Tries
    • 1.Qxe4+?
      • 1...Kxb5
        • 2.Qc4#
      • 1...Bd4
        • 2.Sd6#
        • 2.Qd3#
        • 2.Qxc6#
      • 1...Bxe4+!
    • 1.a4?
      • threat
        • 2.Sb6#
        • 2.d3#
      • 1...Rxc8
        • 2.d3#
      • 1...g1Q
        • 2.d3#
      • 1...g1B
        • 2.d3#
      • 1...Rf3
        • 2.Sb6#
      • 1...Rd8
        • 2.Sb6#
      • 1...Bd4
        • 2.Sd6#
        • 2.d3#
      • 1...Bc7
        • 2.d3#
      • 1...Bxb5!
  • Keys
    • 1.d4!
      • threat
        • 2.Rc5#
      • 1...Rxe2+
        • 2.Bxe2#
      • 1...Kxb5
        • 2.Sc3#
      • 1...Rxd4
        • 2.Qd3#
      • 1...Bxd4
        • 2.Sd6#
      • 1...Bxb5
        • 2.Sb6#
      • 1...Bd6
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • R(c);OGATE::QAB1(H)
    • R(c);N_SPINR(c),OGATE,XR(F)::QAB1(H)
    • B(e);N_GUARD::S(I)
    • B(e);N_GUARD,N_SPINR(c)::S(I)
    • B(e);N_GUARD::S(I),XB(e)
  • Tries
    • Try
      • Q(H);CHECK,XR(c)
      • Vars
        • K(b);S_FLIGHT,XR(G)::QAB1(H)
      • Refutation
        • B(f);CHECK,P_SPINB(f),XQ(H)
    • Try
      • P(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(g);XS(I)::P(C)
        • P(a);::P(C)
        • R(g);::S(I)
        • B(e);::P(C)
      • Refutation
        • B(f);XR(G)
  • Actual
    • P(C);N_PINR(c)
    • Threat
      • R1(G)
    • Vars
      • R(c);CHECK,OGATE,P_SPINR(c),XS(D)::B(A),XR(c)
      • K(b);S_FLIGHT,XR(G)::B(A)+S(D),DCHECK
      • R(c);OGATE,P_SPINR(c),XP(C)::QAB1(H)
      • B(e);N_GUARD,XP(C)::S(I)
      • B(f);SBLOCK,XR(G)::S(I)
      • B(e);N_GUARD::S(I),XB(e)
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