MESON Chess Problem Database

Problem Display
PID: 159802 (4K3/6bB/R1N2kr1/1p2n3/2PNp1pP/2Q2p2/q4R2/8 w - - 0 1)

Sydenham, Colin Peter

Probleemblad, 1982

4K3/6bB/R1N2kr1/1p2n3/2PNp1pP/2Q2p2/q4R2/8

#2

9 + 9

15513 Selected Chess Problems of Colin Sydenham 2015

SOLUTION

  • SOUND
  • Tries
    • 1.Se2?
      • threat
        • 2.Qxe5#
      • 1...Kf5
        • 2.Scd4#
        • 2.Se7#
      • 1...Ke6
        • 2.Scd4#
      • 1...Qb2
        • 2.Se7#
      • 1...Rg5
        • 2.Sa5#
      • 1...Qa1!
    • 1.Sb4+?
      • 1...Qxa6
        • 2.Sd5#
      • 1...Sc6!
    • 1.Sxe5+?
      • 1...Qxa6
        • 2.Sd7#
      • 1...Kxe5!
    • 1.Se7+?
      • 1...Qxa6
        • 2.Sd5#
        • 2.Sg8#
      • 1...Sc6!
    • 1.Sb8+?
      • 1...Sc6
        • 2.Sd7#
      • 1...Qxa6!
  • Keys
    • 1.Sxf3!
      • threat
        • 2.Qxe5#
      • 1...Kf5
        • 2.Sfd4#
      • 1...Ke6
        • 2.Scd4#
      • 1...Qa1
        • 2.Sg5#
      • 1...Qb2
        • 2.Se7#
      • 1...Rg5
        • 2.Sa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);P_PINS(f)
      • Threat
        • QAB1(B),XS(f)
      • Vars
        • K(g);N_SPINP(b),N_SPINS(f),P-FLIGHT::R(F)+S(G),DCHECK
        • Q(a);N_GUARD::R(F)+S(G)
        • R(h);::R(F)+S(G)
      • Refutation
        • Q(a);
    • Try
      • S(G);CHECK
      • Vars
        • Q(a);XR(F)::S(G)
      • Refutation
        • S(f);P_SPINS(f)
    • Try
      • S(G);CHECK,XS(f)
      • Vars
        • Q(a);XR(F)::S(G)
      • Refutation
        • K(g);N_SPINP(b),S_FLIGHT,XS(G)
    • Try
      • S(G);CHECK
      • Refutation
        • S(f);P_SPINS(f)
    • Try
      • S(G);CHECK
      • Vars
        • S(f);P_SPINS(f)::S(G)
      • Refutation
        • Q(a);XR(F)
  • Actual
    • S(D);P_PINS(f),XP(b)
    • Threat
      • QAB1(B),XS(f)
    • Vars
      • K(g);N_SPINS(f),P-FLIGHT,P_SPINR(h)::R(A)+S(D),DCHECK
      • K(g);N_SPINS(f),P-FLIGHT::R(F)+S(G),DCHECK
      • Q(a);N_GUARD::R(A)+S(D)
      • Q(a);N_GUARD::R(F)+S(G)
      • R(h);::R(F)+S(G)
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