MESON Chess Problem Database

Problem Display
PID: 138306 (8/6nQ/5p2/pB3N1p/4R1p1/2k1rq1R/PpNpp3/1K1n3b w - - 0 1)

Westbury, Eric Ernest

L'Italia Scacchistica, 1921

8/6nQ/5p2/pB3N1p/4R1p1/2k1rq1R/PpNpp3/1K1n3b

#2

8 + 13

56 The Problemist 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Rc4#
    • 1...Sxf5
      • 2.Qc7#
  • Tries
    • 1.Sfxe3?
      • threat
        • 2.Sd5#
        • 2.Rc4#
      • 1...Qxe4
        • 2.Sxd1#
        • 2.Sd5#
      • 1...Qxe3
        • 2.Rc4#
      • 1...Qf4
        • 2.Sxd1#
        • 2.Sd5#
      • 1...Qf5
        • 2.Sxd1#
        • 2.Sd5#
      • 1...Sf5
        • 2.Sd5#
        • 2.Qc7#
      • 1...f5
        • 2.Sd5#
        • 2.Qxg7#
      • 1...Sxe3!
    • 1.Qg8?
      • threat
        • 2.Qb3#
        • 2.Qc4#
        • 2.Qc8#
      • 1...Qxe4
        • 2.Qb3#
      • 1...Qxf5
        • 2.Qb3#
        • 2.Qc4#
      • 1...Rxe4
        • 2.Qb3#
      • 1...Qg3
        • 2.Qb3#
        • 2.Qc4#
      • 1...Qf4
        • 2.Qb3#
        • 2.Qc4#
      • 1...Se8
        • 2.Qb3#
        • 2.Qc4#
      • 1...a4
        • 2.Qc4#
        • 2.Qc8#
      • 1...Se6!
  • Keys
    • 1.Sg3!
      • threat
        • 2.Rc4#
      • 1...Qxe4
        • 2.Sxe2#
      • 1...Rxe4
        • 2.Sxe4#
      • 1...Qf4
        • 2.Sxe2#
      • 1...Qf5
        • 2.Sxe2#
      • 1...Sf5
        • 2.Qc7#
      • 1...f5
        • 2.Qxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(g);SBLOCK::R1(E)
    • S(m);OGATE,XS(G)::QAR(H)
  • Tries
    • Try
      • S(G);XR(g)
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);P_SPINQ(h),XS(G)::R1(E)
      • Refutation
        • S(a);XS(G)
    • Try
      • Q(H);
      • Threat
        • DUALS(3)
      • Vars
        • Q(h);P_PINS(C),P_SPINR(g),XR(E)::QAR1(H)
        • R(g);P_SPINQ(h),XR(E)::QAR1(H)
      • Refutation
        • S(m);
  • Actual
    • S(G);
    • Threat
      • R1(E)
    • Vars
      • Q(h);N_GUARD,P_PINS(C),S_CUTR(g),XR(E)::S(G),XP(e)
      • R(g);XR(E)::S(G),XR(g)
      • Q(h);N_GUARD,S_CUTR(g)::S(G),XP(e)
      • S(m);OGATE::QAR(H)
      • P(l);OGATEB::QAB(H),XS(m)
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