MESON Chess Problem Database

Problem Display
PID: 233022 (1kN5/1b2K3/1B6/8/Q7/8/8/8 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Kudesnik, 2010

1kN5/1b2K3/1B6/8/Q7/8/8/8

#2

4 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc8
      • 2.Qe8#
    • 1...Bxc8
      • 2.Qa7#
  • Tries
    • 1.Kd8?
      • threat
        • 2.Bc7#
        • 2.Qa7#
      • 1...Bxc8
        • 2.Qa7#
      • 1...Bh1
        • 2.Qa7#
      • 1...Bg2
        • 2.Qa7#
      • 1...Bf3
        • 2.Qa7#
      • 1...Be4
        • 2.Qa7#
      • 1...Bd5
        • 2.Qa7#
      • 1...Bc6
        • 2.Qa7#
      • 1...Ba8
        • 2.Qa7#
      • 1...Ba6!
    • 1.Bc7+?
      • 1...Kxc8
        • 2.Qd7#
      • 1...Kxc7!
    • 1.Qf4+?
      • 1...Kxc8
        • 2.Qc7#
        • 2.Qf8#
      • 1...Ka8!
  • Keys
    • 1.Ba7+!
      • 1...Kc7
        • 2.Qd7#
      • 1...Ka8
        • 2.Sb6#
      • 1...Kxc8
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);OGATEB,P-FLIGHT,XS(D)::QAR2(A)
    • B(a);SBLOCK,XS(D)::QAB1(A)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XS(D)::QAB1(A)
        • B(a);::QAB1(A)
      • Refutation
        • B(a);
    • Try
      • B(B);CHECK
      • Vars
        • K(b);P-FLIGHT,XS(D)::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT,XB(B)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • B(B);CHECK
    • Vars
      • K(b);S_FLIGHT::QAR1(A)
      • K(b);P-FLIGHT::S(D)
      • K(b);P-FLIGHT,XS(D)::QAB1(A)
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