MESON Chess Problem Database

Problem Display
PID: 198883 (2B5/4p3/1P6/3kP2Q/1R1P1P2/7p/5B1K/6n1 w - - 0 1)

Seilberger, Johann Joseph Petrus Adrianus

Brisbane Courier, 1921

2B5/4p3/1P6/3kP2Q/1R1P1P2/7p/5B1K/6n1

#2

9 + 4

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Qf3#
    • 1...Sf3+
      • 2.Qxf3#
    • 1...e6
      • 2.Bb7#
  • Tries
    • 1.Bxg1?
      • threat
        • 2.Qf3#
      • 1...Kc6
        • 2.Qf3#
      • 1...Ke4!
    • 1.Qe2?
      • 1...Sf3+
        • 2.Qxf3#
      • 1...Kc6
        • 2.Qc4#
        • 2.Qb5#
        • 2.Qe4#
      • 1...e6
        • 2.Bb7#
      • 1...Sxe2!
    • 1.Qg4?
      • threat
        • 2.Bb7#
      • 1...Sf3+
        • 2.Qxf3#
      • 1...Kc6
        • 2.Qe6#
        • 2.Qd7#
      • 1...Ke4!
    • 1.Qf7+?
      • 1...Kc6
        • 2.Qc4#
        • 2.Qe6#
        • 2.d5#
      • 1...e6
        • 2.Bb7#
        • 2.Qb7#
      • 1...Ke4!
    • 1.Qf5?
      • threat
        • 2.Bb7#
      • 1...Kc6
        • 2.Qe4#
        • 2.Qe6#
        • 2.Qd7#
      • 1...Sf3+!
    • 1.e6+?
      • 1...Kc6
        • 2.Qc5#
      • 1...Kd6
        • 2.Qc5#
      • 1...Ke4!
  • Keys
    • 1.Qd1!
      • 1...Sf3+
        • 2.Qxf3#
      • 1...Ke4
        • 2.d5#
      • 1...Kc6
        • 2.d5#
      • 1...e6
        • 2.Bb7#
      • 1...Se2
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB(G)
    • S(a);CHECK,N_GUARD::QAB(G),XS(a)
    • P(d);SBLOCK::B(I)
  • Tries
    • Try
      • B(A);XS(a)
      • Threat
        • QAB(G)
      • Vars
        • K(c);S_FLIGHT::QAB(G)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(G);
      • Vars
        • S(a);CHECK,N_GUARD::QAB(G),XS(a)
        • P(d);SBLOCK::B(I)
      • Refutation
        • S(a);XQ(G)
    • Try
      • Q(G);
      • Threat
        • B(I)
      • Vars
        • S(a);CHECK,N_GUARD::QAB(G),XS(a)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • B(I)
      • Refutation
        • S(a);CHECK
    • Try
      • P(F);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(G)
        • K(c);OGATE,P-FLIGHT::QAB1(G)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(G);
    • Vars
      • S(a);CHECK,N_GUARD::QAB(G),XS(a)
      • K(c);OGATE,S_FLIGHT::R(C)+P(D)
      • K(c);OGATE,S_FLIGHT::P(D)
      • P(d);SBLOCK::B(I)
      • S(a);OGATE::QAB(G)
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