MESON Chess Problem Database

Problem Display
PID: 50898 (1B6/4pn2/1KN3pr/4p2p/5k2/1b1Bpp2/5N1P/Q7 w - - 0 1)

Stubbs, Arthur Goodwin

Chess Amateur (The), 1907

1B6/4pn2/1KN3pr/4p2p/5k2/1b1Bpp2/5N1P/Q7

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sg5
      • 2.Bxe5#
      • 2.Qxe5#
    • 1...Sd6
      • 2.Qxe5#
    • 1...Sd8
      • 2.Qxe5#
    • 1...Sh8
      • 2.Qxe5#
    • 1...e2
      • 2.Qc1#
    • 1...g5
      • 2.Qd4#
  • Tries
    • 1.Bxe5+?
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Kg5!
    • 1.Qg1?
      • threat
        • 2.Sh3#
        • 2.Qg3#
      • 1...e2
        • 2.Sh3#
        • 2.Qc1#
      • 1...Be6
        • 2.Qg3#
      • 1...Sg5
        • 2.Bxe5#
        • 2.Qg3#
      • 1...h4
        • 2.Sh3#
        • 2.Qg4#
      • 1...exf2!
  • Keys
    • 1.Sxe5!
      • threat
        • 2.Sh3#
      • 1...g5+
        • 2.Sg6#
      • 1...Kg5
        • 2.Sxf3#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...exf2
        • 2.Qc1#
      • 1...e2
        • 2.Qc1#
      • 1...Be6
        • 2.Sxf7#
      • 1...Sg5
        • 2.Sxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • S(j);N_GUARD,N_SPINP(e)::QAB1(A),XP(e)
    • S(j);N_GUARD::QAB1(A),XP(e)
    • P(b);OGATEB::QAB(A)
    • P(g);P_PINS(F),SBLOCK::QAR2(A)
  • Tries
    • Try
      • B(G);CHECK,XP(e)
      • Vars
        • S(j);OGATE,XB(G)::QAB1(A),XS(j)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB1(A)
      • Refutation
        • P(b);XS(B)
  • Actual
    • S(F);XP(e)
    • Threat
      • S(B)
    • Vars
      • P(g);CHECK,SBLOCK::B(G)+S(F),DCHECK
      • K(d);S_FLIGHT::S(F),XP(c)
      • S(j);OGATE,P_SPINS(j),XS(F)::QAB1(A),XS(j)
      • P(b);OGATEB,XS(B)::QAB(A)
      • P(b);OGATEB::QAB(A)
      • B(a);S_CUTP(i)::B(G)+S(F),XS(j)
      • S(j);SBLOCK::B(G)+S(F),DCHECK,XP(g)
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