MESON Chess Problem Database

Problem Display
PID: 253085 (2nNr2R/p1BpkpPn/2B2p1p/2p1p1bq/4b2r/1Q2Np2/K1P5/8 w - - 0 1)

Cooper, EJ

3rd Prize, English Mechanic and World of Science, 1888

(First published on Fri Mar 23 1888)

2nNr2R/p1BpkpPn/2B2p1p/2p1p1bq/4b2r/1Q2Np2/K1P5/8

#2

9 + 16

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qg4
      • 2.Qxf7#
    • 1...Bxc2
      • 2.Sd5#
    • 1...Bd3
      • 2.Sd5#
    • 1...Bd5
      • 2.Sxd5#
      • 2.Sf5#
    • 1...Bf5
      • 2.Sd5#
      • 2.Sxf5#
    • 1...Bxc6
      • 2.Sf5#
    • 1...Bg6
      • 2.Sd5#
    • 1...Sf8
      • 2.g8S#
    • 1...d5
      • 2.Rxe8#
    • 1...d6
      • 2.Rxe8#
  • Tries
    • 1.Qe6+?
      • 1...dxe6
        • 2.Rxe8#
      • 1...fxe6!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qxd7#
      • 1...Bxd5+
        • 2.Sxd5#
      • 1...Rxd8
        • 2.Bxd8#
      • 1...dxc6
        • 2.Sxc6#
      • 1...f5
        • 2.Qxe5#
      • 1...Qg4
        • 2.Qxf7#
      • 1...Bf5
        • 2.Sxf5#
      • 1...Sf8
        • 2.g8S#
      • 1...Sb6
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...d6
        • 2.Rxe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 5
  • Sets
    • Q(g);N_GUARD::QAR1(C),XP(m)
    • B(b);N_GUARD,XP(B)::S(D)
    • B(b);N_GUARD::S(D)
    • B(b);N_GUARD,XB(E)::S(D)
    • S(n);SBLOCK,S_CUTR(p)::P=S
    • P(k);::R1(I),XR(p)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • P(k);XQ(C)::R1(I),XR(p)
      • Refutation
        • P(m);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C),XP(k)
    • Vars
      • B(b);CHECK,XQ(C)::S(D),XB(b)
      • R(p);OGATE,XS(H)::B(F),XR(p)
      • P(k);XB(E)::S(H),XP(k)
      • P(h);N_GUARD::QAR2(C),XP(e)
      • Q(g);N_GUARD::QAR1(C),XP(m)
      • B(b);N_GUARD::S(D),XB(b)
      • S(n);SBLOCK,S_CUTR(p)::P=S
      • S(o);N_GUARD::QAB1(C)
      • S(o);N_GUARD::QAB1(C),XS(o)
      • P(k);::R1(I),XR(p)
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