MESON Chess Problem Database

Problem Display
PID: 11174 (5Q1K/8/1Nn1kp2/6b1/p2Pp3/1q2N2b/B4R2/8 w - - 0 1)

Chapman, CF

Chess, 1937

5Q1K/8/1Nn1kp2/6b1/p2Pp3/1q2N2b/B4R2/8

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Bxc4#
    • 1...Qd5
      • 2.Bxd5#
    • 1...Bxe3
      • 2.Rxf6#
      • 2.Qxf6#
    • 1...Bh6
      • 2.Rxf6#
      • 2.Qxf6#
    • 1...a3
      • 2.Bxb3#
  • Tries
    • 1.Sf5?
      • threat
        • 2.Sg7#
        • 2.Qg8#
      • 1...Sxd4
        • 2.Qe7#
        • 2.Qe8#
      • 1...Bf4
        • 2.Sg7#
      • 1...Bh6
        • 2.Qg8#
      • 1...Se5
        • 2.Sg7#
        • 2.Qe7#
        • 2.Qe8#
      • 1...Se7
        • 2.Qxe7#
      • 1...Sd8
        • 2.Sg7#
        • 2.Qe7#
        • 2.Qe8#
      • 1...Bxf5!
  • Keys
    • 1.Sed5!
      • threat
        • 2.Sc7#
      • 1...Qxd5
        • 2.Bxd5#
      • 1...Qxb6
        • 2.Sxb6#
      • 1...Sxd4
        • 2.Qe7#
      • 1...Qf3
        • 2.Se3#
      • 1...Bf4
        • 2.Qxf6#
      • 1...Se7
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(a);OGATE::B(A),XQ(a)
    • P(c);N_GUARD::B(A),XQ(a)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(e);::S(C)
        • B(e);::QAB(F)
        • S(f);N_GUARD::QAR1(F),XS(f)
      • Refutation
        • B(b);XS(C)
  • Actual
    • S(C);N_PINQ(a)
    • Threat
      • S(C)
    • Vars
      • Q(a);OGATE,P_SPINQ(a),XS(C)::B(A),XQ(a)
      • Q(a);XS(E)::B(A)+S(C),XQ(a)
      • S(f);N_GUARD,XP(D)::QAR1(F)
      • Q(a);::B(A)+S(C)
      • B(e);N_GUARD::QAR1(F),XP(h)
      • S(f);N_GUARD::QAR1(F),XS(f)
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