MESON Chess Problem Database

Problem Display
PID: 143181 (8/3p1p2/2rnbp2/2pq2n1/2B1kP1p/4NNQp/1p1R1P1B/1K6 w - - 0 1)

Holroyd, GC

Social Chess Quarterly (The), 1934

8/3p1p2/2rnbp2/2pq2n1/2B1kP1p/4NNQp/1p1R1P1B/1K6

#2

9 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3+
      • 2.Bxd3#
    • 1...Qe5
      • 2.Bd3#
    • 1...Qf5
      • 2.Bd3#
    • 1...Bg4
      • 2.Bxd5#
    • 1...Bf5
      • 2.Bxd5#
    • 1...f5
      • 2.Sxg5#
  • Tries
    • 1.Rd4+?
      • 1...cxd4
        • 2.Sd2#
      • 1...Qxd4!
    • 1.f5?
      • threat
        • 2.Qf4#
        • 2.Qg4#
      • 1...Qd3+
        • 2.Bxd3#
      • 1...Qxf5
        • 2.Bd3#
      • 1...Bxf5
        • 2.Bxd5#
        • 2.Qf4#
      • 1...Qe5
        • 2.Bd3#
      • 1...hxg3!
  • Keys
    • 1.Qg4!
      • threat
        • 2.f5#
      • 1...Qd3+
        • 2.Bxd3#
      • 1...Bxg4
        • 2.Bxd5#
      • 1...Qe5
        • 2.Bd3#
      • 1...Qf5
        • 2.Bd3#
      • 1...Bf5
        • 2.Bxd5#
      • 1...Sf5
        • 2.fxg5#
      • 1...f5
        • 2.Sxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(f);CHECK,N_GUARD::B(H),XQ(f)
    • Q(f);N_GUARD::B(H)
    • B(j);N_GUARD::B(H),XQ(f)
    • P(k);N_GUARD,S_CUTQ(f)::S(F),XS(g)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • P(e);SBLOCK,XR(B)::S(F)
      • Refutation
        • Q(f);XR(B)
    • Try
      • P(I);
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);CHECK,N_GUARD::B(H),XQ(f)
        • Q(f);N_GUARD,XP(I)::B(H)
        • Q(f);N_GUARD::B(H)
      • Refutation
        • P(d);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAR(G)+P(I)
    • Vars
      • Q(f);CHECK,N_GUARD::B(H),XQ(f)
      • B(j);N_GUARD,XQ(G)::B(H),XQ(f)
      • Q(f);N_GUARD::B(H)
      • B(j);N_GUARD::B(H),XQ(f)
      • S(i);S_CUTB(j)::QAR(G)+P(I),XS(g)
      • P(k);N_GUARD,S_CUTQ(f)::S(F),XS(g)
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