MESON Chess Problem Database

Problem Display
PID: 254555 (8/1Kn5/2Q2bbq/2P3rp/2k3p1/PN6/P2PPN2/8 w - - 0 1)

Willmott, Arthur

Probleemblad, 1983

8/1Kn5/2Q2bbq/2P3rp/2k3p1/PN6/P2PPN2/8

#2

9 + 8

3713 Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5
      • 2.Qxc5#
    • 1...Rd5
      • 2.Qa4#
    • 1...Bd4
      • 2.Sa5#
    • 1...Bd3
      • 2.exd3#
    • 1...Sd5
      • 2.Qa6#
  • Tries
    • 1.Se4?
      • threat
        • 2.Sd6#
        • 2.d3#
      • 1...Qf8
        • 2.d3#
      • 1...Rd5
        • 2.Qa4#
      • 1...Be5
        • 2.d3#
      • 1...Be7
        • 2.d3#
      • 1...Sb5
        • 2.d3#
      • 1...Se8
        • 2.d3#
      • 1...Bxe4!
  • Keys
    • 1.Sd1!
      • threat
        • 2.Se3#
      • 1...Rxc5
        • 2.Qxc5#
      • 1...Rd5
        • 2.Qa4#
      • 1...Re5
        • 2.Sb2#
      • 1...Rf5
        • 2.d3#
      • 1...Bd4
        • 2.Sa5#
      • 1...Sd5
        • 2.Qa6#

Anticipated by 200786(1983)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(c);OGATE,P_SPINR(c),XP(G)::QAR1(H),XR(c)
    • R(c);SBLOCK::QAR2(H)
    • B(e);SBLOCK::S(F)
    • B(f);OGATE::P(C),XB(f)
    • S(h);N_GUARD,SBLOCK::QAB(H)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);::P(B)
        • R(c);SBLOCK::QAR2(H)
        • B(e);::P(B)
        • S(h);::P(B)
      • Refutation
        • B(f);P_PINQ(H),XS(D)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • R(c);OGATE,P_SPINR(c),XP(G)::QAR1(H),XR(c)
      • R(c);SBLOCK::QAR2(H)
      • R(c);S_CUTB(e)::S(D)
      • R(c);S_CUTB(f)::P(B)
      • B(e);SBLOCK::S(F)
      • S(h);N_GUARD,SBLOCK::QAB(H)
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