MESON Chess Problem Database

Problem Display
PID: 118582 (8/4nR2/8/2K1kP2/3N1b1R/2P1q3/4Q3/B7 w - - 0 1)

Sheppard, Charles William

Chess Correspondent, 1945

8/4nR2/8/2K1kP2/3N1b1R/2P1q3/4Q3/B7

#2

8 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Rxe7#
    • 1...Qe4
      • 2.Sf3#
    • 1...Bh2
      • 2.Qxe3#
    • 1...Bg3
      • 2.Qxe3#
  • Tries
    • 1.Rf6?
      • threat
        • 2.Re6#
      • 1...Ke4
        • 2.Re6#
      • 1...Kxf6!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qe6#
      • 1...Qxd4+
        • 2.Qxd4#
      • 1...Ke4
        • 2.Rxe7#
      • 1...Qxc3
        • 2.Sf3#
      • 1...Sd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • K(c);P-FLIGHT,P_SPINB(b)::R(H),XS(d)
    • Q(a);N_PINS(D)::S(D)
    • B(b);N_GUARD::QAR2(B),XQ(a)
  • Tries
    • Try
      • R(H);
      • Threat
        • R1(H)
      • Vars
        • K(c);P-FLIGHT,P_SPINB(b)::R(H)
      • Refutation
        • K(c);N_SPINQ(a),S_FLIGHT,XR(H)
  • Actual
    • Q(B);N_PINQ(a)
    • Threat
      • QAR1(B)
    • Vars
      • Q(a);CHECK,OGATE,XS(D)::QAB1(B),XQ(a)
      • K(c);P-FLIGHT,P_SPINB(b)::R(H),XS(d)
      • Q(a);N_PINS(D),P_PINQ(B),XP(C)::S(D)
      • S(d);N_GUARD::QAR1(B),XS(d)
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