MESON Chess Problem Database

Problem Display
PID: 248143 (2B1Nn2/p7/q1k4K/8/3P4/NQ6/8/8 w - - 0 1)

Kashdan, Isaac

Pittsburgh Sunday Post, 1924

(First published on Sun Nov 23 1924)

2B1Nn2/p7/q1k4K/8/3P4/NQ6/8/8

#2

6 + 4

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Qb7#
    • 1...Qe2
      • 2.Qb7#
    • 1...Qd3
      • 2.Qb7#
    • 1...Qc4
      • 2.Qb7#
    • 1...Qb5
      • 2.Qxb5#
    • 1...Qb7
      • 2.Qxb7#
    • 1...Qxc8
      • 2.Qb5#
    • 1...Qxa3
      • 2.Qb7#
    • 1...Qa4
      • 2.Qb7#
    • 1...Qa5
      • 2.Qb7#
    • 1...Qb6
      • 2.Qf3#
    • 1...Se6
      • 2.Qxe6#
    • 1...Sg6
      • 2.Qe6#
    • 1...Sd7
      • 2.Qe6#
    • 1...Sh7
      • 2.Qe6#
  • Tries
    • 1.Qc4+?
      • 1...Kb6
        • 2.Qxa6#
        • 2.Qc5#
        • 2.Qc7#
      • 1...Qxc4!
    • 1.Qd5+?
      • 1...Kb6
        • 2.Qc5#
      • 1...Kxd5+!
    • 1.Qb4?
      • threat
        • 2.Qc5#
        • 2.Qd6#
      • 1...Qxc8
        • 2.Qb5#
      • 1...Qxa3
        • 2.Qb7#
      • 1...Qb5
        • 2.Qd6#
        • 2.Qxb5#
      • 1...Qc4
        • 2.Qd6#
        • 2.Qb7#
      • 1...Qa5
        • 2.Qd6#
        • 2.Qb7#
      • 1...Qb6
        • 2.Qd6#
      • 1...Se6
        • 2.Qd6#
      • 1...Sd7
        • 2.Qd6#
      • 1...Kd5+!
    • 1.Qb8?
      • threat
        • 2.Qd6#
      • 1...Qxc8
        • 2.Qb5#
      • 1...Qxa3
        • 2.Qb7#
      • 1...Kd5+!
  • Keys
    • 1.Kg7!
      • 1...Qb7+
        • 2.Qxb7#
      • 1...Se6+
        • 2.Qxe6#
      • 1...Qxc8
        • 2.Qb5#
      • 1...Qxa3
        • 2.Qb7#
      • 1...Qc4
        • 2.Qb7#
      • 1...Qb5
        • 2.Qxb5#
      • 1...Qf1
        • 2.Qb7#
      • 1...Qe2
        • 2.Qb7#
      • 1...Qd3
        • 2.Qb7#
      • 1...Qa4
        • 2.Qb7#
      • 1...Qa5
        • 2.Qb7#
      • 1...Qb6
        • 2.Qf3#
      • 1...Sg6
        • 2.Qe6#
      • 1...Sd7
        • 2.Qe6#
      • 1...Sh7
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(a);N_GUARD::QAB1(B)
    • Q(a);N_GUARD::QAB1(B),XQ(a)
    • Q(a);N_GUARD,XB(E)::QAB1(B)
    • Q(a);N_GUARD,XS(A)::QAB1(B)
    • Q(a);SBLOCK::QAB(B)
    • S(d);N_GUARD::QAR2(B),XS(d)
    • S(d);N_GUARD::QAR2(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Refutation
        • Q(a);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(B)
      • Refutation
        • K(b);CHECK,S_FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);N_GUARD,XB(E)::QAB1(B)
        • Q(a);N_GUARD,XS(A)::QAB1(B)
        • Q(a);SBLOCK::QAR1(B)
        • S(d);::QAR1(B)
      • Refutation
        • K(b);CHECK,S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • Q(a);N_GUARD,XB(E)::QAB1(B)
        • Q(a);N_GUARD,XS(A)::QAB1(B)
      • Refutation
        • K(b);CHECK,S_FLIGHT
  • Actual
    • K(D);S_FLIGHT
    • Vars
      • Q(a);CHECK,N_GUARD::QAB1(B),XQ(a)
      • S(d);CHECK,N_GUARD::QAR2(B),XS(d)
      • Q(a);N_GUARD,XB(E)::QAB1(B)
      • Q(a);N_GUARD,XS(A)::QAB1(B)
      • Q(a);N_GUARD::QAB1(B)
      • Q(a);N_GUARD::QAB1(B),XQ(a)
      • Q(a);SBLOCK::QAB(B)
      • S(d);N_GUARD::QAR2(B)
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