MESON Chess Problem Database

Problem Display
PID: 2405 (1K3N2/5p2/3PnR2/4k3/2Qr4/8/4P3/B5R1 w - - 0 1)

Henderson, John

Source?, 0000

1K3N2/5p2/3PnR2/4k3/2Qr4/8/4P3/B5R1

#2

8 + 4

4774 Canadian Chess Problems 1890

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Qxd4#
    • 1...Sc5
      • 2.Qxd4#
    • 1...Sg5
      • 2.Qxd4#
    • 1...Sc7
      • 2.Qxd4#
    • 1...Sg7
      • 2.Qxd4#
    • 1...Sd8
      • 2.Qxd4#
    • 1...Sxf8
      • 2.Qxd4#
  • Tries
    • 1.Rg5+?
      • 1...Kxd6
        • 2.Qc5#
        • 2.Qc7#
      • 1...Kxf6
        • 2.Sh7#
      • 1...Sxg5
        • 2.Qxd4#
      • 1...Ke4!
    • 1.Qd5+?
      • 1...Kxf6
        • 2.Sd7#
        • 2.Sh7#
      • 1...Kxd5!
  • Keys
    • 1.e4!
      • 1...Kxe4
        • 2.Re1#
      • 1...Kxd6
        • 2.Qc7#
      • 1...Kxf6
        • 2.Sd7#
      • 1...Sxf8
        • 2.Qxd4#
      • 1...Sf4
        • 2.Qxd4#
      • 1...Sc5
        • 2.Qxd4#
      • 1...Sg5
        • 2.Qxd4#
      • 1...Sc7
        • 2.Qxd4#
      • 1...Sg7
        • 2.Qxd4#
      • 1...Sd8
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::QAB1(D),XR(a)
    • S(c);N_GUARD,XS(H)::QAB1(D),XR(a)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(F)::S(H)
        • S(c);XR(B)::QAB1(D),XR(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Refutation
        • K(b);N_SPINR(a),P-FLIGHT,XQ(D)
  • Actual
    • P(C);
    • Vars
      • K(b);OGATEB,P-FLIGHT,XP(C)::R(B)
      • K(b);N_SPINR(a),OGATEB,P_SPINS(c),S_FLIGHT,XP(E)::QAB1(D)
      • K(b);S_FLIGHT,XR(F)::S(H)
      • S(c);N_GUARD,XS(H)::QAB1(D),XR(a)
      • S(c);N_GUARD::QAB1(D),XR(a)
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