MESON Chess Problem Database

Problem Display
PID: 59929 (5b2/2N5/p2p4/2kBnN2/8/2pp2pK/5q1n/1Q4B1 w - - 0 1)

Keirans, Peteris

6th Prize, Brisbane Courier, 1925

5b2/2N5/p2p4/2kBnN2/8/2pp2pK/5q1n/1Q4B1

#2

6 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Bxe3#
    • 1...Qd4
      • 2.Bxd4#
    • 1...g2
      • 2.Bxf2#
    • 1...a5
      • 2.Qb5#
  • Tries
    • 1.Se7?
      • threat
        • 2.Se6#
      • 1...Kd4
        • 2.Qb6#
      • 1...Bxe7!
    • 1.Sg7?
      • threat
        • 2.Sge6#
      • 1...Kd4
        • 2.Qb6#
      • 1...Bxg7!
    • 1.Qb3?
      • threat
        • 2.Sxa6#
        • 2.Se6#
      • 1...a5
        • 2.Sa6#
        • 2.Se6#
        • 2.Qb5#
      • 1...Sc4!
    • 1.Qb7?
      • threat
        • 2.Sxa6#
        • 2.Se6#
      • 1...a5
        • 2.Sa6#
        • 2.Se6#
        • 2.Qb5#
      • 1...Sc6!
  • Keys
    • 1.Se3!
      • threat
        • 2.Se6#
      • 1...Qf1+
        • 2.Sxf1#
      • 1...Qg2+
        • 2.Sxg2#
      • 1...Qf5+
        • 2.Sxf5#
      • 1...Kd4
        • 2.Qb6#
      • 1...Qxe3
        • 2.Bxe3#
      • 1...Qb2
        • 2.Sc2#
      • 1...Qf6
        • 2.Sf5#
      • 1...Qf7
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • Q(a);OGATE::B(B),XQ(a)
    • P(e);N_GUARD::B(B),XQ(a)
    • P(h);N_GUARD::QAR1(A)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(F)
      • Vars
        • K(f);S_FLIGHT::QAB(A)
      • Refutation
        • B(j);XS(E)
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • K(f);S_FLIGHT::QAB(A)
      • Refutation
        • B(j);XS(E)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • S(g);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • S(g);
  • Actual
    • S(E);N_PINQ(a)
    • Threat
      • S(F)
    • Vars
      • Q(a);CHECK::B(B)+S(E),XQ(a)
      • K(f);S_FLIGHT::QAB(A)
      • Q(a);OGATE,P_SPINQ(a),XS(E)::B(B),XQ(a)
      • Q(a);::B(B)+S(E)
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