MESON Chess Problem Database

Problem Display
PID: 109374 (5N2/8/2B5/2P1k1nn/6P1/1Kp1B3/Q7/8 w - - 0 1)

Silvera, Arthur P

St. John Globe, 1888

5N2/8/2B5/2P1k1nn/6P1/1Kp1B3/Q7/8

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Se6
      • 2.Sd7#
    • 1...Sf6
      • 2.Qh2#
    • 1...c2
      • 2.Qa1#
      • 2.Qb2#
  • Tries
    • 1.Kc2?
      • threat
        • 2.Sd7#
      • 1...Sf6
        • 2.Sg6#
      • 1...Kf6!
    • 1.Ka3?
      • threat
        • 2.Sd7#
      • 1...Sf6
        • 2.Sg6#
        • 2.Qh2#
      • 1...Kf6!
    • 1.Ka4?
      • threat
        • 2.Sd7#
      • 1...Sf6
        • 2.Sg6#
        • 2.Qh2#
      • 1...Kf6!
    • 1.Kb4?
      • threat
        • 2.Sd7#
      • 1...Sf6
        • 2.Sg6#
        • 2.Qh2#
      • 1...Kf6!
    • 1.Qf2?
      • threat
        • 2.Bd4#
        • 2.Qf5#
      • 1...Sf4
        • 2.Bd4#
        • 2.Qxf4#
      • 1...Se6
        • 2.Sg6#
        • 2.Sd7#
        • 2.Qf5#
      • 1...Sg3
        • 2.Bd4#
        • 2.Qf4#
      • 1...Sg7
        • 2.Bd4#
        • 2.Qf4#
      • 1...Sf3!
    • 1.Qh2+?
      • 1...Sg3
        • 2.Qh8#
      • 1...Sf4
        • 2.Qxf4#
        • 2.Qh8#
      • 1...Kf6!
  • Keys
    • 1.Qa7!
      • 1...Kf6
        • 2.Bd4#
      • 1...Sf3
        • 2.Qe7#
      • 1...Sh3
        • 2.Qe7#
      • 1...Se4
        • 2.Qe7#
      • 1...Se6
        • 2.Sd7#
      • 1...Sf7
        • 2.Qe7#
      • 1...Sh7
        • 2.Qe7#
      • 1...Sg3
        • 2.Qg7#
      • 1...Sf4
        • 2.Qg7#
      • 1...Sf6
        • 2.Qb8#
        • 2.Qc7#
      • 1...Sg7
        • 2.Qxg7#
      • 1...c2
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 1
  • Sets
    • S(c);SBLOCK::S(G)
    • S(d);N_GUARD,SBLOCK::QAB(A)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • S(G)
      • Vars
        • S(d);SBLOCK::S(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(B);P-FLIGHT
      • Threat
        • S(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(B);S_FLIGHT
      • Threat
        • S(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(B);P-FLIGHT
      • Threat
        • S(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • S(c);
    • Try
      • Q(A);CHECK
      • Vars
        • S(d);OGATE,P_SPINS(d)::QAB(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);S_FLIGHT::B(C)
      • S(c);N_GUARD::QAR2(A)
      • S(c);SBLOCK::S(G)
      • S(d);N_GUARD::QAB(A)
      • S(d);N_GUARD::QAB(A),XS(d)
      • P(a);OGATEB::QAB(A)
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