MESON Chess Problem Database

Problem Display
PID: 227132 (8/2BPp2B/K2p4/6R1/3N1k1p/2n2N1q/8/4RnQ1 w - - 0 1)

Willmott, Arthur

The Problemist, 1989

8/2BPp2B/K2p4/6R1/3N1k1p/2n2N1q/8/4RnQ1

#2

9 + 7

15601 Albrecht-Leiss-Degener Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qg4
      • 2.Rxg4#
      • 2.Qxg4#
    • 1...Qf5
      • 2.Rxf5#
    • 1...Qh1
      • 2.Rg4#
      • 2.Rf5#
      • 2.Qg4#
    • 1...Qh2
      • 2.Rg4#
      • 2.Rf5#
      • 2.Qg4#
    • 1...Qxf3
      • 2.Se6#
      • 2.Rf5#
    • 1...Sd2
      • 2.Qe3#
    • 1...Sh2
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sg3
      • 2.Qe3#
    • 1...Sb1
      • 2.Re4#
    • 1...Sd1
      • 2.Re4#
    • 1...Sa2
      • 2.Re4#
    • 1...Sa4
      • 2.Re4#
    • 1...Se4
      • 2.Rxe4#
    • 1...Sb5
      • 2.Re4#
    • 1...Sd5
      • 2.Re4#
  • Tries
    • 1.Bxd6+?
      • 1...e5
        • 2.Bxe5#
      • 1...exd6!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sg6#
      • 1...Qd3+
        • 2.Sxd3#
      • 1...dxe5
        • 2.Bxe5#
      • 1...Qg2
        • 2.Se6#
      • 1...Qg4
        • 2.Rxg4#
        • 2.Qxg4#
      • 1...Qg3
        • 2.Se6#
        • 2.Rf5#
      • 1...Sg3
        • 2.Qe3#
      • 1...Qf5
        • 2.Rxf5#
      • 1...Qe6
        • 2.Sxe6#
        • 2.Sd3#
        • 2.Rxf1#
      • 1...Qe3
        • 2.Se6#
        • 2.Qg4#
      • 1...Se3
        • 2.Sd3#
      • 1...Se2
        • 2.Sxe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(c);N_GUARD::R1(E),XQ(c)
    • S(a);N_GUARD::QAB1(B)
    • S(a);N_GUARD::QAB1(B),XS(a)
    • S(b);N_GUARD::R1(A)
    • S(b);N_GUARD::R1(A),XS(b)
  • Tries
    • Try
      • B(G);CHECK,XP(f)
      • Vars
        • P(g);P_SPINP(g)::B(G),XP(g)
      • Refutation
        • P(g);XB(G)
  • Actual
    • S(C);N_PINP(f)
    • Threat
      • S(C)
    • Vars
      • Q(c);CHECK,N_GUARD::S(C),XQ(c)
      • P(f);OGATE,P_SPINP(f),XS(C)::B(G),XP(f)
      • Q(c);N_GUARD::S(D)
      • S(a);N_GUARD,S_CUTQ(c)::QAB1(B)
      • Q(c);N_GUARD::R1(E),XQ(c)
      • S(a);S_CUTQ(c)::S(C)
      • S(b);N_GUARD::S(D),XS(b)
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