MESON Chess Problem Database

Problem Display
PID: 53065 (Q7/3N4/2p1np2/3p2p1/2n1k1P1/1NR5/3pB3/5RK1 w - - 0 1)

Beale, John Lindsay

Chess Life, 1953

Q7/3N4/2p1np2/3p2p1/2n1k1P1/1NR5/3pB3/5RK1

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Bd3#
    • 1...Se5
      • 2.Sxf6#
    • 1...Sd4
      • 2.Sbc5#
    • 1...Sf4
      • 2.Bf3#
    • 1...d4
      • 2.Qxc6#
  • Tries
    • 1.Sxd2+?
      • 1...Kd4
        • 2.Rd3#
      • 1...Sxd2!
    • 1.Sbc5+?
      • 1...Kd4
        • 2.Rd3#
      • 1...Sxc5!
    • 1.Rf4+?
      • 1...Sxf4
        • 2.Bf3#
      • 1...gxf4
        • 2.Bf3#
      • 1...Kxf4!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qh1#
      • 1...Se3
        • 2.Bd3#
      • 1...Se5
        • 2.Sxf6#
      • 1...Sd4
        • 2.Sbc5#
      • 1...Sf4
        • 2.Bf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • S(b);SBLOCK::B(C)
    • S(b);SBLOCK::S(G),XP(h)
    • S(g);N_GUARD,SBLOCK::S(D)
    • S(g);SBLOCK::B(C)
    • P(d);OGATEB,P_SPINP(f)::QAB(H),XP(f)
  • Tries
    • Try
      • S(D);CHECK,XP(a)
      • Vars
        • K(c);P-FLIGHT::R1(E)
      • Refutation
        • S(b);XS(D)
    • Try
      • S(D);CHECK
      • Vars
        • K(c);P-FLIGHT::R1(E)
      • Refutation
        • S(g);XS(D)
    • Try
      • R(A);CHECK
      • Vars
        • S(g);SBLOCK,XR(A)::B(C)
        • P(e);SBLOCK,XR(A)::B(C)
      • Refutation
        • K(c);P-FLIGHT,XR(A)
  • Actual
    • Q(H);
    • Threat
      • QAB(H)
    • Vars
      • S(b);SBLOCK::B(C)
      • S(b);SBLOCK::S(G),XP(h)
      • S(g);N_GUARD,SBLOCK::S(D)
      • S(g);SBLOCK::B(C)
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