MESON Chess Problem Database

Problem Display
PID: 150418 (8/4Kppq/1B2b3/4k1Np/1p2Pp2/1n6/8/7Q w - - 0 1)

Bennett, Frederick

Chess, 1955

8/4Kppq/1B2b3/4k1Np/1p2Pp2/1n6/8/7Q

#2

5 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Qxe4#
    • 1...Bh3
      • 2.Sxf7#
    • 1...Bg4
      • 2.Sxf7#
    • 1...Bf5
      • 2.Sxf7#
    • 1...Bd7
      • 2.Sxf7#
    • 1...Bc8
      • 2.Sxf7#
    • 1...Sa1
      • 2.Qxa1#
    • 1...Sd2
      • 2.Qa1#
    • 1...Sd4
      • 2.Bc7#
    • 1...Sa5
      • 2.Qa1#
    • 1...Sc5
      • 2.Qa1#
    • 1...f3
      • 2.Qh2#
  • Tries
    • 1.Qa1+?
      • 1...Sd4
        • 2.Bxd4#
        • 2.Bc7#
        • 2.Qxd4#
      • 1...Sxa1!
    • 1.Qb1?
      • threat
        • 2.Sf3#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...Bg4
        • 2.Sxf7#
      • 1...Sd2
        • 2.Qa1#
        • 2.Qb2#
      • 1...Sd4
        • 2.Bc7#
      • 1...f3!
    • 1.Qd1?
      • threat
        • 2.Bc7#
        • 2.Qd6#
      • 1...Bd5
        • 2.Bc7#
        • 2.Qxd5#
      • 1...Sd2
        • 2.Qa1#
      • 1...Sd4
        • 2.Bxd4#
        • 2.Bc7#
        • 2.Qxd4#
      • 1...Qxe4!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Sf3#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...f3
        • 2.Qg3#
      • 1...Bg4
        • 2.Sxf7#
      • 1...Sd2
        • 2.Qa1#
      • 1...Sd4
        • 2.Bc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • Q(i);OGATE,XP(B)::QAR1(A),XQ(i)
    • B(f);N_GUARD::S(C),XP(g)
    • S(a);N_GUARD::QAB(A),XS(a)
    • S(a);N_GUARD::QAB(A)
    • S(a);SBLOCK::B(D)
    • P(c);OGATEB::QAB(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • S(C)
      • Vars
        • Q(i);OGATE,XP(B)::QAR1(A),XQ(i)
        • B(f);N_GUARD::S(C),XP(g)
        • S(a);SBLOCK::B(D)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::QAB(A)
      • Refutation
        • Q(i);XP(B)
  • Actual
    • Q(A);
    • Threat
      • S(C)
    • Vars
      • Q(i);OGATE,P_SPINQ(i),XP(B)::QAR1(A),XQ(i)
      • P(c);OGATEB::QAB(A)
      • B(f);N_GUARD::S(C),XP(g)
      • S(a);N_GUARD::QAB(A)
      • S(a);SBLOCK::B(D)
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