MESON Chess Problem Database

Problem Display
PID: 137156 (8/1q6/3r4/pN6/k2p1N1R/8/1Q2P3/3K1B2 w - - 0 1)

Fontana, Don A

Australasian Chess Magazine, 1919

8/1q6/3r4/pN6/k2p1N1R/8/1Q2P3/3K1B2

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Sd5#
      • 2.Sc3#
  • Tries
    • 1.Rh3?
      • threat
        • 2.Ra3#
        • 2.Qb3#
      • 1...Qxb5
        • 2.Ra3#
        • 2.Qa3#
      • 1...Qd5
        • 2.Ra3#
      • 1...Qf7
        • 2.Ra3#
      • 1...d3
        • 2.Sc3#
      • 1...Qf3!
    • 1.e3?
      • threat
        • 2.Qa3#
      • 1...dxe3+
        • 2.Sd5#
      • 1...Qxb5
        • 2.Bxb5#
      • 1...d3
        • 2.Sd5#
        • 2.Sc3#
      • 1...Qf3+!
  • Keys
    • 1.e4!
      • threat
        • 2.Qa3#
      • 1...dxe4 ep+
        • 2.Sd5#
      • 1...Qxb5
        • 2.Bxb5#
      • 1...d3
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);::R1(F)
        • P(b);N_GUARD::S(G)
      • Refutation
        • Q(e);P_PINP(D)
    • Try
      • P(D);
      • Threat
        • QAR1(C)
      • Vars
        • P(b);CHECK,XP(D)::R(F)+S(E)
        • Q(e);OGATE,XS(G)::B(B),XQ(e)
      • Refutation
        • Q(e);CHECK
  • Actual
    • P(D);
    • Threat
      • QAR1(C)
    • Vars
      • P(b);CHECK,EP,XP(D)::R(F)+S(E)
      • Q(e);OGATE,XS(G)::B(B),XQ(e)
      • P(b);N_GUARD::S(G)
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