MESON Chess Problem Database

Problem Display
PID: 66880 (5B2/3B4/1b6/p1qQ1N1K/Pkn1p1R1/2prp3/R1p5/2N5 w - - 0 1)

Heath, AW

Chess, 1947

5B2/3B4/1b6/p1qQ1N1K/Pkn1p1R1/2prp3/R1p5/2N5

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Qb5#
    • 1...Qe7
      • 2.Qb5#
    • 1...Qxf8
      • 2.Qb5#
    • 1...Bc7
      • 2.Bxc5#
      • 2.Qxc5#
    • 1...Bd8
      • 2.Bxc5#
      • 2.Qxc5#
    • 1...Sb2
      • 2.Qb3#
    • 1...Sd2
      • 2.Sxd3#
    • 1...Sa3
      • 2.Sxd3#
      • 2.Qb3#
    • 1...Se5
      • 2.Qb3#
    • 1...Sd6
      • 2.Sxd3#
      • 2.Qb3#
  • Tries
    • 1.Sxd3+?
      • 1...exd3
        • 2.Qxc4#
      • 1...Kb3!
    • 1.Rb2+?
      • 1...Ka3
        • 2.Rb3#
      • 1...Sxb2
        • 2.Qb3#
      • 1...cxb2!
  • Keys
    • 1.Se7!
      • threat
        • 2.Sc6#
      • 1...Qxd5+
        • 2.Sxd5#
      • 1...Rxd5+
        • 2.Sxd5#
      • 1...Qxe7
        • 2.Qb5#
      • 1...Qc6
        • 2.Sxc6#
      • 1...Sa3
        • 2.Sxd3#
      • 1...Se5
        • 2.Qb3#
      • 1...Sd6
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • Q(i);OGATE::QAR1(E)
    • Q(i);N_SPINQ(i),OGATE,XB(I)::QAR1(E)
    • S(f);OGATE,P_SPINP(g)::QAR1(E)
    • S(f);P_SPINP(g)::S(A),XR(c)
  • Tries
    • Try
      • S(A);CHECK,XR(c)
      • Vars
        • P(g);P_SPINS(f),XS(A)::QAR1(E),XS(f)
      • Refutation
        • K(e);N_SPINQ(i),P-FLIGHT,P_SPINS(f)
    • Try
      • R(B);CHECK
      • Vars
        • K(e);S_FLIGHT::R1(B)
        • S(f);OGATE,P_SPINP(g),XR(B)::QAR1(E)
      • Refutation
        • P(b);XR(B)
  • Actual
    • S(F);N_PINQ(i),P_SPINQ(E)
    • Threat
      • S(F)
    • Vars
      • Q(i);CHECK,XQ(E)::B(I)+S(F),DCHECK,XQ(i)
      • R(c);CHECK,XQ(E)::S(F),XR(c)
      • Q(i);N_PINQ(E),P_SPINQ(i),XS(F)::QAR1(E)
      • Q(i);N_PINQ(E)::B(I)+S(F),DCHECK,XQ(i)
      • S(f);P_SPINP(g)::S(A),XR(c)
      • S(f);N_PINQ(E),P_SPINP(g)::QAR1(E)
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Developed and maintained by Brian Stephenson.
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