MESON Chess Problem Database

Problem Display
PID: 2256 (5n2/1K1PR1Rn/1N3k2/3p1r1p/5p2/4PQ2/5N2/8 w - - 0 1)

Cook, Eugene Beauharnais

Source?, 0000

5n2/1K1PR1Rn/1N3k2/3p1r1p/5p2/4PQ2/5N2/8

#2

8 + 7

1679 American Chess Nuts 1868

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd7
      • 2.Sxd7#
    • 1...fxe3
      • 2.Sxd5#
    • 1...d4
      • 2.Se4#
    • 1...h4
      • 2.Sg4#
  • Tries
    • 1.Ref7+?
      • 1...Ke5
        • 2.Qxd5#
      • 1...Ke6!
    • 1.Qxh5?
      • threat
        • 2.Sg4#
        • 2.Rgf7#
        • 2.Qf7#
      • 1...Rg5
        • 2.Rgf7#
        • 2.Qf7#
      • 1...Se6
        • 2.Sg4#
      • 1...Sg5
        • 2.Sg4#
      • 1...Sg6
        • 2.Sg4#
        • 2.Rgf7#
        • 2.Qxg6#
      • 1...Rxh5!
    • 1.Qxf4?
      • threat
        • 2.Sxd5#
      • 1...d4
        • 2.Se4#
        • 2.Sd5#
      • 1...Rxf4!
  • Keys
    • 1.exf4!
      • 1...Rxf4
        • 2.Qxf4#
      • 1...Sxd7
        • 2.Sxd7#
      • 1...Re5
        • 2.fxe5#
      • 1...Rg5
        • 2.fxg5#
      • 1...Sg5
        • 2.fxg5#
      • 1...Se6
        • 2.Ref7#
      • 1...Sg6
        • 2.Rgf7#
      • 1...d4
        • 2.Se4#
      • 1...h4
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • S(g);XP(F)::S(D),XS(g)
    • P(a);P_SPINR(c),XP(B)::S(D),XP(b)
    • P(b);N_GUARD::S(A)
    • P(d);N_GUARD::S(A)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • K(e);S_FLIGHT::QAR1(C),XP(b)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(C);XP(d)
      • Threat
        • DUALS(3)
      • Vars
        • S(g);::S(A)
        • S(f);::S(A)
      • Refutation
        • R(c);XQ(C)
    • Try
      • Q(C);P_PINR(c),XP(a)
      • Threat
        • S(D),XP(b)
      • Refutation
        • R(c);N_SPINR(c),XQ(C)
  • Actual
    • P(B);XP(a)
    • Vars
      • R(c);OGATE,P_SPINR(c),XP(B)::QAR2(C),XR(c)
      • S(g);XP(F)::S(D),XS(g)
      • R(c);OGATE::QAR(C)+P(B)DCHECK,XR(c)
      • S(f);OGATE::P(B),XS(f)
      • S(g);SBLOCK::R1(G)
      • S(g);SBLOCK::R1(H)
      • P(b);N_GUARD::S(A)
      • P(d);N_GUARD::S(A)
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