MESON Chess Problem Database

Problem Display
PID: 232959 (8/5Bq1/7R/6k1/7r/5QK1/8/8 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Kudesnik, 1992

8/5Bq1/7R/6k1/7r/5QK1/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Rg6#
    • 1...Qb2
      • 2.Rg6#
    • 1...Qc3
      • 2.Rg6#
    • 1...Qd4
      • 2.Rg6#
    • 1...Qf6
      • 2.Qxf6#
    • 1...Qf8
      • 2.Rg6#
      • 2.Qf6#
    • 1...Qh8
      • 2.Rg6#
    • 1...Qg6
      • 2.Rxg6#
    • 1...Qh7
      • 2.Qf6#
    • 1...Qg8
      • 2.Qf6#
    • 1...Rh1
      • 2.Qf4#
    • 1...Rh2
      • 2.Qf4#
    • 1...Ra4
      • 2.Rh5#
      • 2.Qh5#
    • 1...Rb4
      • 2.Rh5#
      • 2.Qh5#
    • 1...Rc4
      • 2.Rh5#
      • 2.Qh5#
    • 1...Rd4
      • 2.Rh5#
      • 2.Qh5#
    • 1...Re4
      • 2.Rh5#
      • 2.Qh5#
    • 1...Rf4
      • 2.Qh5#
      • 2.Qxf4#
    • 1...Rh5
      • 2.Rxh5#
      • 2.Qxh5#
      • 2.Qf4#
    • 1...Rxh6
      • 2.Qf4#
  • Tries
    • 1.Qe3+?
      • 1...Rf4
        • 2.Qxf4#
      • 1...Kf5+!
  • Keys
    • 1.Rh5+!
      • 1...Rxh5
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 12
  • Sets
    • Q(c);N_GUARD::R1(C)
    • Q(c);N_GUARD,P_PINQ(A)::R1(C)
    • Q(c);N_GUARD::QAB1(A),XQ(c)
    • Q(c);N_GUARD::R1(C),XQ(c)
    • Q(c);N_GUARD::QAB1(A)
    • R(a);N_GUARD::QAB1(A)
    • R(a);N_GUARD,SBLOCK,XR(C)::QAB1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAB1(A),XR(a)
      • Refutation
        • K(b);CHECK,P-FLIGHT
  • Actual
    • R(C);CHECK
    • Vars
      • R(a);XR(C)::QAB1(A)
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